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Permanent student of mathematics, physics, and sometimes, the philosophy of their intersection.
The Language of Bad Physics
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- April 11, 2011
- 03:08 PM
- 826 views
What’s been going on in the universe
by S.C. Kavassalis in The Language of Bad Physics
So my readers probably noticed the fact that this blog just stopped mid-February, without any explanation. Life in our local part of the universe was substantially more chaotic than usual. World wide protests, devastating natural disasters, nuclear fears, war, and us just trying to go about our day to day lives, buying a home, securing funding, getting sick, planning a wedding, all the while not looking at what was sitting just out of the corner of our eyes.
When the world is in crisis, phys........ Read more »
Stacy S. McGaugh. (2011) A Novel Test of the Modified Newtonian Dynamics with Gas Rich Galaxies. Phys.Rev.Lett.106:121303,2011. arXiv: 1102.3913v1
EDELWEISS Collaboration. (2011) Final results of the EDELWEISS-II WIMP search using a 4-kg array of cryogenic germanium detectors with interleaved electrodes. arXiv. arXiv: 1103.4070v2
V. Dzhunushaliev, V. Folomeev, B. Kleihaus, & J. Kunz. (2011) A Star Harbouring a Wormhole at its Center. arXiv. arXiv: 1102.4454v1
B. Knispel, P. Lazarus, B. Allen, D. Anderson, C. Aulbert, N. D. R. Bhat, O. Bock, S. Bogdanov, A. Brazier, F. Camilo.... (2011) Arecibo PALFA Survey and Einstein@Home: Binary Pulsar Discovery by Volunteer Computing. The Astrophysical Journal Letters, 732, L1 (2011). arXiv: 1102.5340v2
K. S. Cheng, D. O. Chernyshov, V. A. Dogiel, C. -M. Ko, & W. -H. Ip. (2011) Origin of the Fermi Bubble. arXiv. arXiv: 1103.1002v1
Riess, A., Macri, L., Casertano, S., Lampeitl, H., Ferguson, H., Filippenko, A., Jha, S., Li, W., & Chornock, R. (2011) A 3% SOLUTION: DETERMINATION OF THE HUBBLE CONSTANT WITH THE AND WIDE FIELD CAMERA 3 . The Astrophysical Journal, 730(2), 119. DOI: 10.1088/0004-637X/730/2/119
F. Francisco, O. Bertolami, P. J. S. Gil, & J. Páramos. (2011) Modelling the reflective thermal contribution to the acceleration of the Pioneer spacecraft. arXiv. arXiv: 1103.5222v1
Philip Bechtle, Klaus Desch, Herbi K. Dreiner, Michael Krämer, Ben O'Leary, Carsten Robens, Björn Sarrazin, & Peter Wienemann. (2011) What if the LHC does not find supersymmetry in the sqrt(s). arXiv. arXiv: 1102.4693v1
O. Buchmueller, & et al. (2011) Implications of Initial LHC Searches for Supersymmetry. arXiv. arXiv: 1102.4585v1
ATLAS Collaboration. (2011) Search for Supersymmetry Using Final States with One Lepton, Jets, and Missing Transverse Momentum with the ATLAS Detector in sqrt[s]. Physical Review Letters, 106(13). DOI: 10.1103/PhysRevLett.106.131802
Dine, M., & Mason, J. (2011) Supersymmetry and its dynamical breaking. Reports on Progress in Physics, 74(5), 56201. DOI: 10.1088/0034-4885/74/5/056201
CMS Collaboration. (2011) Measurement of WW Production and Search for the Higgs Boson in pp Collisions at sqrt(s) . arXiv. arXiv: 1102.5429v2
CDF Collaboration, & T. Aaltonen. (2011) Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) . arXiv. arXiv: 1104.0699v1
Trenkwalder, A., & et al. (2011) Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture. Physical Review Letters, 106(11). DOI: 10.1103/PhysRevLett.106.115304
Tudor Dimofte. (2011) Quantum Riemann Surfaces in Chern-Simons Theory. arXiv. arXiv: 1102.4847v1
Mureika, J., & Stojkovic, D. (2011) Detecting Vanishing Dimensions via Primordial Gravitational Wave Astronomy. Physical Review Letters, 106(10). DOI: 10.1103/PhysRevLett.106.101101
Patrizia Vitale. (2011) A field-theoretic approach to Spin Foam models in Quantum Gravity. arXiv. arXiv: 1103.4172v1
Matt Visser. (2011) Status of Horava gravity: A personal perspective. arXiv. arXiv: 1103.5587v2
Vyacheslav I. Dokuchaev. (2011) Is there life inside black holes?. arXiv. arXiv: 1103.6140v1
- February 22, 2011
- 11:06 AM
- 1,144 views
This “Week” in the Universe: February 1st – February 21st
by S.C. Kavassalis in The Language of Bad Physics
So I’ve been remiss in my reading lately, but here are my picks from the past few weeks. We have Outstanding Problems in Galaxy Formation, Herschel on Dark Matter, Dark Matter Detection Discussed, “Symmetry Breaking” in Graphene?, Closed Timelike Curves and Postselection, Frame-Like Geometry of Double Field Theory, and Loop Lectures with Carlo Rovelli.
Astrophysics and Gravitation:
Outstanding Problems in Galaxy Formation
Joseph Silk (2011). Feedback in Galaxy Formation arXiv arXiv:........ Read more »
Joseph Silk. (2011) Feedback in Galaxy Formation. arXiv. arXiv: 1102.0283v1
Alexandre Amblard, & et al. (2011) Sub-millimetre galaxies reside in dark matter halos with masses greater than 3x10^11 solar masses. Nature. arXiv: 1101.1080v1
San-Jose, P., González, J., & Guinea, F. (2011) Electron-Induced Rippling in Graphene. Physical Review Letters, 106(4). DOI: 10.1103/PhysRevLett.106.045502
Lloyd, S., Maccone, L., Garcia-Patron, R., Giovannetti, V., Shikano, Y., Pirandola, S., Rozema, L., Darabi, A., Soudagar, Y., Shalm, L.... (2011) Closed Timelike Curves via Postselection: Theory and Experimental Test of Consistency. Physical Review Letters, 106(4). DOI: 10.1103/PhysRevLett.106.040403
Hohm, O., & Kwak, S. (2011) Frame-like geometry of double field theory. Journal of Physics A: Mathematical and Theoretical, 44(8), 85404. DOI: 10.1088/1751-8113/44/8/085404
Carlo Rovelli. (2011) Lectures on loop gravity. arXiv. arXiv: 1102.3660v2
- January 25, 2011
- 04:38 PM
- 967 views
This Week in the Universe: January 18th – January 24th
by S.C. Kavassalis in The Language of Bad Physics
Phenomenally beautiful math was the main highlight of this week, I’d say, although none of it for the very faint of heart.
The CMS on SUSY, Bill Unruh on simulated Hawking radiation, Ed Witten on knots, and Schenkel and Van Oystaeyen on noncommutative space(times):
High Energy Physics and Particles:
The LHC Doesn’t Need Data-Collecting Mode To Have Fun
CMS Collaboration (2011). Search for Supersymmetry in pp Collisions at 7 TeV in Events with Jets and Missing Transverse Energy arXi........ Read more »
CMS Collaboration. (2011) Search for Supersymmetry in pp Collisions at 7 TeV in Events with Jets and Missing Transverse Energy. arXiv. arXiv: 1101.1628v1
Silke Weinfurtner, Edmund W. Tedford, Matthew C. J. Penrice, William G. Unruh, & Gregory A. Lawrence. (2010) Measurement of stimulated Hawking emission in an analogue system. Phys. Rev. Lett., 106(2), 1302-1306. arXiv: 1008.1911v2
Edward Witten. (2011) Fivebranes and Knots. arXiv. arXiv: 1101.3216v1
Alexander Schenkel. (2011) Quantum Field Theory on Curved Noncommutative Spacetimes. arXiv. arXiv: 1101.3492v2
- January 20, 2011
- 03:22 PM
- 648 views
Finite formula found for partition numbers
by S.C. Kavassalis in The Language of Bad Physics
Credit: Emory and Ken Ono
So this isn’t physics*, but if you squint hard enough, you can probably make a connection. The hot topic today is Ken Ono‘s latest work on the partition function:
Ken Ono, Amanda Folsom, & Zach Kent (2011). l-adic properties of the partition function American Institute of Mathematics.
Ken Ono & Jan Bruinier (2011). AN ALGEBRAIC FORMULA FOR THE PARTITION FUNCTION American Institute of Mathematics.
A EurekAlert press release appeared today, entitled........ Read more »
Ken Ono, Amanda Folsom, & Zach Kent. (2011) l-adic properties of the partition function. American Institute of Mathematics. info:/
Folsom A, & Ono K. (2008) The spt-function of Andrews. Proceedings of the National Academy of Sciences of the United States of America, 105(51), 20152-6. PMID: 19091951
- January 18, 2011
- 10:09 AM
- 1,486 views
This Week in the Universe: January 11th – January 17th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Planck’s Early Results
Planck Collaboration (2011). Planck Early Results: The Planck mission arXiv arXiv: 1101.2022v1
The Early Results Papers from the Planck Collaboration are based on the data acquired by the Planck satellite between August 13th, 2009 to June 6th, 2010. This work is “an overview of the history of Planck in its first year of operations” and was released along side Planck’s Early Release Compact Source Catalogue, “the........ Read more »
Planck Collaboration. (2011) Planck Early Results: The Planck mission. arXiv. arXiv: 1101.2022v1
Sukanya Chakrabarti, Frank Bigiel, Philip Chang, & Leo Blitz. (2011) Finding Dark Galaxies From Their Tidal Imprints. arXiv. arXiv: 1101.0815v1
Baldi, M., & Pettorino, V. (2011) High-z massive clusters as a test for dynamical coupled dark energy. Monthly Notices of the Royal Astronomical Society: Letters. DOI: 10.1111/j.1745-3933.2010.00975.x
Turok, N. (2011) Particle physics: Beyond Feynman's diagrams. Nature, 469(7329), 165-166. DOI: 10.1038/469165a
- January 10, 2011
- 01:23 PM
- 1,114 views
This Week in the Universe: January 4th – January 10th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Supermassive Black Hole Surprise?
CREDIT: Reines, et al., David Nidever, NRAO/AUI/NSF, NASA
The dwarf galaxy Henize 2-10, seen in visible light by the Hubble Space Telescope. The central, light-pink region shows an area of radio emission, seen with the Very Large Array. This area indicates the presence of a supermassive black hole drawing in material from its surroundings. This also is indicated by strong X-ray emission from this region detected by the Chandra X-Ray........ Read more »
Andreyev, A., Elseviers, J., Huyse, M., Van Duppen, P., Antalic, S., Barzakh, A., Bree, N., Cocolios, T., Comas, V., Diriken, J.... (2010) New Type of Asymmetric Fission in Proton-Rich Nuclei. Physical Review Letters, 105(25). DOI: 10.1103/PhysRevLett.105.252502
Siye Wu. (2010) Projective flatness in the quantisation of bosons and fermions. arXiv. arXiv: 1008.5333v2
- December 26, 2010
- 09:25 PM
- 1,094 views
This Week in the Universe: December 20th – December 27th
by S.C. Kavassalis in The Language of Bad Physics
Since I’m in the Rockies soaking up my last few days of vacation, I haven’t actually looked at much this week, but there were two papers I thought were worth noting.
Astrophysics and Gravitation:
Reconstructing Histories with Good Statistics
Tracy Holsclaw, Ujjaini Alam, Bruno Sanso, Herbert Lee, Katrin Heitmann, Salman Habib, & David Higdon (2010). Nonparametric Dark Energy Reconstruction from Supernova Data Phys. Rev. Lett. arXiv: 1011.3079v1
The abstract:
Understanding the ori........ Read more »
Tracy Holsclaw, Ujjaini Alam, Bruno Sanso, Herbert Lee, Katrin Heitmann, Salman Habib, & David Higdon. (2010) Nonparametric Dark Energy Reconstruction from Supernova Data. Phys. Rev. Lett. arXiv: 1011.3079v1
Valeri P. Frolov, & Shinji Mukohyama. (2010) Brane Holes. arXiv. arXiv: 1012.4541v1
- December 20, 2010
- 12:59 PM
- 916 views
This Week in the Universe: December 14th – December 20th
by S.C. Kavassalis in The Language of Bad Physics
This will be an especially short one, as I’m sitting in a hotel room in Idaho right now and didn’t pre-write anything, but check out 10 Delicious Papers from 2010 for more fun!
Astrophysics and Gravitation:
Hints of a Multiverse?
Stephen M. Feeney, Matthew C. Johnson, Daniel J. Mortlock, & Hiranya V. Peiris (2010). First Observational Tests of Eternal Inflation arXiv DOI: 1012.1995
The abstract:
The eternal inflation scenario predicts that our observable universe resides inside........ Read more »
Stephen M. Feeney, Matthew C. Johnson, Daniel J. Mortlock, & Hiranya V. Peiris. (2010) First Observational Tests of Eternal Inflation. arXiv. DOI: 1012.1995
CMS Collaboration. (2010) Search for Microscopic Black Hole Signatures at the Large Hadron Collider. arXiv. arXiv: 1012.3375v1
Marcin Domagala,, Kristina Giesel,, & Wojciech Kaminski, Jerzy Lewandowski. (2010) Gravity quantized. arXiv. DOI: 1009.2445
Slava G. Turyshev, & Viktor T. Toth. (2010) The Pioneer Anomaly. arXiv. DOI: 1001.3686
- December 13, 2010
- 11:14 AM
- 1,050 views
This “Week” in the Universe: November 30th – December 13th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
The Milky Way Project
The Milky Way Project aims to sort and measure our galaxy, the Milky Way. Initially we’re asking you to help us find and draw bubbles in beautiful infrared data from the Spitzer Space Telescope.
Understanding the cold, dusty material that we see in these images, helps scientists to learn how stars form and how our galaxy changes and evolves with time.
The GalaxyZoo project expands! Help astronomers out when you’re feeling in the........ Read more »
Abhay Ashtekar, Frans Pretorius, & Fethi M. Ramazanoğlu. (2010) Surprises in the Evaporation of 2-Dimensional Black Holes. arXiv. arXiv: 1011.6442v1
V. G. Gurzadyan, & R. Penrose. (2010) Concentric circles in WMAP data may provide evidence of violent pre-Big-Bang activity. arXiv. arXiv: 1011.3706v1
I. K. Wehus, & H. K. Eriksen. (2010) A search for concentric circles in the 7-year WMAP temperature sky maps. arXiv. arXiv: 1012.1268v1
Adam Moss, Douglas Scott, & James P. Zibin. (2010) No evidence for anomalously low variance circles on the sky. arXiv. arXiv: 1012.1305v1
V. G. Gurzadyan, & R. Penrose. (2010) More on the low variance circles in CMB sky. arXiv. arXiv: 1012.1486v1
- November 29, 2010
- 08:25 PM
- 2,179 views
This Week in the Universe: November 23rd – November 29th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Lensing of Black Holes Can Determine the Metric Around Them?
Bin-Nun, A. (2010). Gravitational lensing of stars orbiting Sgr A* as a probe of the black hole metric in the Galactic center Physical Review D, 82 (6) DOI: 10.1103/PhysRevD.82.064009
From the abstract:
We show that a possible astrophysical experiment, detection of lensed images of stars orbiting close to Sgr A*, can provide insight into the form of the metric around a black hole. We model Sgr A* as a bl........ Read more »
Bin-Nun, A. (2010) Gravitational lensing of stars orbiting Sgr A* as a probe of the black hole metric in the Galactic center. Physical Review D, 82(6). DOI: 10.1103/PhysRevD.82.064009
Marinoni, C., & Buzzi, A. (2010) A geometric measure of dark energy with pairs of galaxies. Nature, 468(7323), 539-541. DOI: 10.1038/nature09577
Davoudiasl, H., Morrissey, D., Sigurdson, K., & Tulin, S. (2010) Unified Origin for Baryonic Visible Matter and Antibaryonic Dark Matter. Physical Review Letters, 105(21). DOI: 10.1103/PhysRevLett.105.211304
Lucchesi, D., & Peron, R. (2010) Accurate Measurement in the Field of the Earth of the General-Relativistic Precession of the LAGEOS II Pericenter and New Constraints on Non-Newtonian Gravity. Physical Review Letters, 105(23). DOI: 10.1103/PhysRevLett.105.231103
Eugenio Bianchi. (2010) Black Hole Entropy, Loop Gravity, and Polymer Physics. arXiv. arXiv: 1011.5628v1
- November 24, 2010
- 10:56 AM
- 1,646 views
This “Week” in the Universe: November 9th – November 22nd
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Fundamental constants: Big G revisited
Davis, R. (2010). Fundamental constants: Big G revisited Nature, 468 (7321), 181-183 DOI: 10.1038/468181b
Credit: Nature. a, A spherical 'source mass' (ms) is brought near a pendulum's spherical bob (the 'test mass', mt) and causes the bob to move a small distance z from its usual resting position (grey). The gravitational force between the two masses (left side of equation), which depends on Newton's........ Read more »
Davis, R. (2010) Fundamental constants: Big G revisited. Nature, 468(7321), 181-183. DOI: 10.1038/468181b
Galaxy Zoo. (2010) Galaxy Zoo Supernovae. arXiv. arXiv: 1011.2199v2
Andresen, G., & et al. (2010) Trapped antihydrogen. Nature. DOI: 10.1038/nature09610
V. G. Gurzadyan, & R. Penrose. (2010) Concentric circles in WMAP data may provide evidence of violent pre-Big-Bang activity. arXiv. arXiv: 1011.3706v1
Belgiorno, F., Cacciatori, S., Clerici, M., Gorini, V., Ortenzi, G., Rizzi, L., Rubino, E., Sala, V., & Faccio, D. (2010) Hawking Radiation from Ultrashort Laser Pulse Filaments. Physical Review Letters, 105(20). DOI: 10.1103/PhysRevLett.105.203901
Alberto S. Cattaneo, & Florian Schaetz. (2010) Introduction to supergeometry. arXiv. arXiv: 1011.3401v1
Benjamin Bahr, Bianca Dittrich, & Song He. (2010) Coarse graining theories with gauge symmetries. arXiv. arXiv: 1011.3667v1
Veronika E. Hubeny. (2010) The Fluid/Gravity Correspondence: a new perspective on the Membrane Paradigm. arXiv. arXiv: 1011.4948v1
- November 10, 2010
- 10:30 AM
- 1,276 views
This Week in the Universe: November 2nd – November 8th
by S.C. Kavassalis in The Language of Bad Physics
Hot topics in astrophysics, gravitation, high energy, and quantum gravity for the week.... Read more »
Negrello, M., & et al. (2010) The Detection of a Population of Submillimeter-Bright, Strongly Lensed Galaxies. Science, 330(6005), 800-804. DOI: 10.1126/science.1193420
Aguilar-Arevalo, A., & et al. (2010) Event Excess in the MiniBooNE Search for ν[over ¯]_{μ}→ν[over ¯]_{e} Oscillations. Physical Review Letters, 105(18). DOI: 10.1103/PhysRevLett.105.181801
David J. Toms. (2010) Quantum gravitational contributions to quantum electrodynamics. Nature 468:56-59,2010. arXiv: 1010.0793v1
- November 2, 2010
- 11:38 AM
- 1,308 views
This Week in the Universe: October 26th – November 1st
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Hubble Tries to See into the Future
Illustration Credit: NASA, ESA, and G. Bacon (STScI), Science Credit: NASA, ESA, and J. Anderson and R. van der Marel (STScI)
From NASA, ESA, and J. Anderson and R. van der Marel (STScI):
The multicolor snapshot, at top, taken with Wide Field Camera 3 aboard NASA’s Hubble Space Telescope, captures the central region of the giant globular cluster Omega Centauri. All the stars in the image are moving in random direction........ Read more »
Hoover, S., & et al. (2010) Observation of Ultrahigh-Energy Cosmic Rays with the ANITA Balloon-Borne Radio Interferometer. Physical Review Letters, 105(15). DOI: 10.1103/PhysRevLett.105.151101
CMS Collaboration. (2010) First Measurement of the Cross Section for Top-Quark Pair Production in Proton-Proton Collisions at sqrt(s). arXiv. arXiv: 1010.5994v1
Andrew Randono. (2010) Gauge Gravity: a forward-looking introduction. arXiv. arXiv: 1010.5822v1
- October 26, 2010
- 11:24 AM
- 1,120 views
This “Week” in the Universe: October 12th – October 25th
by S.C. Kavassalis in The Language of Bad Physics
Two weeks of news in one!
Astrophysics and Gravitation:
Did We Already Have the Data to Show Dark Matter Annihilation?
Dan Hooper, & Lisa Goodenough (2010). Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope arXiv arXiv: 1010.2752v1
Analyzing old data from the Fermi Gamma Ray Space Telescope, the authors have noticed gamma ray emissions consistent with predictions for a certain type of dark matter. Unfortunately, these things are never nice, clea........ Read more »
Dan Hooper, & Lisa Goodenough. (2010) Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope. arXiv. arXiv: 1010.2752v1
Champion, D., Hobbs, G., Manchester, R., Edwards, R., Backer, D., Bailes, M., Bhat, N., Burke-Spolaor, S., Coles, W., Demorest, P.... (2010) MEASURING THE MASS OF SOLAR SYSTEM PLANETS USING PULSAR TIMING. The Astrophysical Journal, 720(2). DOI: 10.1088/2041-8205/720/2/L201
Poznanski, D., Nugent, P., & Filippenko, A. (2010) TYPE II-P SUPERNOVAE AS STANDARD CANDLES: THE SDSS-II SAMPLE REVISITED. The Astrophysical Journal, 721(2), 956-959. DOI: 10.1088/0004-637X/721/2/956
Lopes, I., & Silk, J. (2010) Neutrino Spectroscopy Can Probe the Dark Matter Content in the Sun. Science, 330(6003), 462-462. DOI: 10.1126/science.1196564
Lehnert, M., Nesvadba, N., Cuby, J., Swinbank, A., Morris, S., Clément, B., Evans, C., Bremer, M., & Basa, S. (2010) Spectroscopic confirmation of a galaxy at redshift z . Nature, 467(7318), 940-942. DOI: 10.1038/nature09462
Raphael Bousso, Ben Freivogel, Stefan Leichenauer, & Vladimir Rosenhaus. (2010) Eternal inflation predicts that time will end. arXiv. arXiv: 1009.4698v1
Sabine Hossenfelder. (2010) Experimental Search for Quantum Gravity. arXiv. arXiv: 1010.3420v1
Major, S. (2010) Shape in an atom of space: exploring quantum geometry phenomenology. Classical and Quantum Gravity, 27(22), 225012. DOI: 10.1088/0264-9381/27/22/225012
Sachdev, S. (2010) Holographic Metals and the Fractionalized Fermi Liquid. Physical Review Letters, 105(15). DOI: 10.1103/PhysRevLett.105.151602
Henrique Gomes, Sean Gryb, & Tim Koslowski. (2010) Einstein gravity as a 3D conformally invariant theory. arXiv. arXiv: 1010.2481v1
- October 18, 2010
- 12:00 PM
- 1,108 views
Guest Post: The fine-structure constant is probably constant by Sean Carroll
by S.C. Kavassalis in The Language of Bad Physics
This is the first guest post on The Language of Bad Physics by Cosmic Variance‘s Sean Carroll. This post is cross-posted on Cosmic Variance.
A few weeks ago there was a bit of media excitement about a somewhat surprising experimental result. Observations of quasar spectra indicated that the fine structure constant, the parameter in physics that describes the strength of electromagnetism, seems to be slightly different on one side of the universe than on the other. The preprint is here......... Read more »
J. K. Webb, J. A. King, M. T. Murphy, V. V. Flambaum, R. F. Carswell, & M. B. Bainbridge. (2010) Evidence for spatial varia. arXiv. arXiv: 1008.3907v1
- October 11, 2010
- 06:59 PM
- 1,149 views
This Week in the Universe: October 5th – October 11th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Early Universe was Overheated, says NASA
Michael Shull, Kevin France, Charles Danforth, Britton Smith, & Jason Tumlinson (2010). Hubble/COS Observations of the Quasar HE 2347-4342: Probing the Epoch of He II Patchy Reionization at Redshifts z = 2.4-2.9 arXiv arXiv: 1008.2957v1
Credit: NASA/Michael Shull, University of Colorado
From the Press Release:
During a period of universal warming 11 billion years ago, quasars — the brilliant core of active galaxies ........ Read more »
Michael Shull, Kevin France, Charles Danforth, Britton Smith, & Jason Tumlinson. (2010) Hubble/COS Observations of the Quasar HE 2347-4342: Probing the Epoch of He II Patchy Reionization at Redshifts z . arXiv. arXiv: 1008.2957v1
Perez-Garcia, M., Silk, J., & Stone, J. (2010) Dark Matter, Neutron Stars, and Strange Quark Matter. Physical Review Letters, 105(14). DOI: 10.1103/PhysRevLett.105.141101
SuperB Collaboration, E. Grauges et al., Francesco Forti, Blair N. Ratcliff, & David Aston. (2010) SuperB Progress Reports -- Detector. arXiv. arXiv: 1007.4241v1
Gary Felder, & Stephanie Erickson. (2010) CurvedLand: An Applet for Illustrating Curved Geometry without Embedding. arXiv. arXiv: 1010.1426v1
Poltis, R., & Stojkovic, D. (2010) Can Primordial Magnetic Fields Seeded by Electroweak Strings Cause an Alignment of Quasar Axes on Cosmological Scales?. Physical Review Letters, 105(16). DOI: 10.1103/PhysRevLett.105.161301
- October 4, 2010
- 09:41 PM
- 597 views
This Week in the Universe: September 28th – October 4th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Vacuum-Driven Evolution in Astrophysics
William C. C. Lima, George E. A. Matsas, & Daniel A. T. Vanzella (2010). Awaking the vacuum in relativistic stars Physical Review Letters arXiv: 1009.1771v1
In a very cool paper that will be appearing in the Physical Review Letters at the end of the week, Lima et al. have shown an interesting (and surprising) relationship between neutron star formation and the vacuum energy density of our universe. Using some semi-classica........ Read more »
William C. C. Lima, George E. A. Matsas, & Daniel A. T. Vanzella. (2010) Awaking the vacuum in relativistic stars. Physical Review Letters. arXiv: 1009.1771v1
P. H. Damgaard, K. Splittorff, & J. J. M. Verbaarschot. (2010) Microscopic Spectrum of the Wilson Dirac Operator. arXiv. arXiv: 1001.2937v3
F. Belgiorno, S. L. Cacciatori, M. Clerici, V. Gorini, G. Ortenzi, L. Rizzi, E. Rubino, V. G. Sala, & D. Faccio. (2010) Hawking radiation from ultrashort laser pulse filaments. arXiv. arXiv: 1009.4634v1
- September 27, 2010
- 11:27 AM
- 883 views
This (Long) Week in the Universe: September 16th – September 27th
by S.C. Kavassalis in The Language of Bad Physics
I know, I know, I switched back to writing these on Mondays again without telling anyone. It turns out, Wednesdays were a terrible choice of day for me. I swear I asked someone to fill in for me last week…
...but I guess she wasn't all that interested in the job.
Astrophysics and Gravitation:
Taking a Swim in the Lagoon Nebula
Credit: NASA/ESA Hubble Space Telescope
NASA and the ESA Hubble Space Telescope, via the Advanced Camera for Surveys, have provided us with a gorgeous pictur........ Read more »
Marisaldi, M., Argan, A., Trois, A., Giuliani, A., Tavani, M., Labanti, C., Fuschino, F., Bulgarelli, A., Longo, F., Barbiellini, G.... (2010) Gamma-Ray Localization of Terrestrial Gamma-Ray Flashes. Physical Review Letters, 105(12). DOI: 10.1103/PhysRevLett.105.128501
S. Hoover, & et al. (2010) Observation of Ultra-high-energy Cosmic Rays with the ANITA Balloon-borne Radio Interferometer. Physical Review Letters. arXiv: 1005.0035v2
A. J. Gallagher, S. G. Ryan, A. E. García Pérez, & W. Aoki. (2010) The barium isotopic mixture for the metal-poor subgiant star HD140283. Astronomy and Astrophysics. arXiv: 1008.3541v1
CMS Collaboration. (2010) Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC. JHEP. arXiv: 1009.4122v1
Lehner, L., & Pretorius, F. (2010) Black Strings, Low Viscosity Fluids, and Violation of Cosmic Censorship. Physical Review Letters, 105(10). DOI: 10.1103/PhysRevLett.105.101102
Chou, C., Hume, D., Rosenband, T., & Wineland, D. (2010) Optical Clocks and Relativity. Science, 329(5999), 1630-1633. DOI: 10.1126/science.1192720
- September 15, 2010
- 10:16 AM
- 1,006 views
This Week in the Universe: September 9th – September 15th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
Astrophysics, by General Mills
Vella, D., & Mahadevan, L. (2005). The “Cheerios effect” American Journal of Physics, 73 (9) DOI: 10.1119/1.1898523
FOX News and a few other news agencies have discovered the Cheerios Effect this week (unfortunately, MSNBC beat them to this scope by about five years). Back in 2005, Vella and Mehadevan described the “Cheerios Effect”, the tendency for small, wet, objects to attract each other.
From the abstract:
Ob........ Read more »
Vella, D., & Mahadevan, L. (2005) The “Cheerios effect”. American Journal of Physics, 73(9), 817. DOI: 10.1119/1.1898523
O. Adriani, & et al. (2010) PAMELA Results on the Cosmic-Ray Antiproton Flux from 60 MeV to 180 GeV in Kinetic Energy. Phys. Rev. Lett., 105(12), 1101-1106. info:/10.1103/PhysRevLett.105.121101
Lopes, I., & Silk, J. (2010) Neutrino Spectroscopy Can Probe the Dark Matter Content in the Sun. Science. DOI: 10.1126/science.1196564
Lehner, L., & Pretorius, F. (2010) Black Strings, Low Viscosity Fluids, and Violation of Cosmic Censorship. Physical Review Letters, 105(10). DOI: 10.1103/PhysRevLett.105.101102
- September 9, 2010
- 11:11 AM
- 660 views
This Week in the Universe: September 2nd – September 8th
by S.C. Kavassalis in The Language of Bad Physics
Astrophysics and Gravitation:
What Supernova 1987A Left Behind
France, K., McCray, R., Heng, K., Kirshner, R., Challis, P., Bouchet, P., Crotts, A., Dwek, E., Fransson, C., Garnavich, P., Larsson, J., Lawrence, S., Lundqvist, P., Panagia, N., Pun, C., Smith, N., Sollerman, J., Sonneborn, G., Stocke, J., Wang, L., & Wheeler, J. (2010). Observing Supernova 1987A with the Refurbished Hubble Space Telescope Science DOI: 10.1126/science.1192134
Hubble Video: Supernova 1987A Observed by Hubble fro........ Read more »
France, K., McCray, R., Heng, K., Kirshner, R., Challis, P., Bouchet, P., Crotts, A., Dwek, E., Fransson, C., Garnavich, P.... (2010) Observing Supernova 1987A with the Refurbished Hubble Space Telescope. Science. DOI: 10.1126/science.1192134
Mahajan, S., & Yoshida, Z. (2010) Twisting Space-Time: Relativistic Origin of Seed Magnetic Field and Vorticity. Physical Review Letters, 105(9). DOI: 10.1103/PhysRevLett.105.095005
David F. Crawford. (2010) Observational evidence favours a static universe. arXiv. info:/1009.0953
Katrin Gelfert, & Adilson E. Motter. (2010) (Non)Invariance of Dynamical Quantities for Orbit Equivalent Flows . Communications in Mathematical Physics. info:/10.1007/s00220-010-1120-x
Steven Carlip. (2010) The Small Scale Structure of Spacetime. arXiv. arXiv: 1009.1136v1
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