All posts; Tags Include "High Energy Astrophysical Phenomena"
- October 14, 2016
- 06:20 AM
- 295 views
Forgetting Earth, forgetting Mars: Dementia, pollution, and space travel
by gdw in FictionalFieldwork
Forgetting Earth Dementia. Few words inspire greater fear in those of us who value (quasi-?) independent thought. The term ‘dementia’ encompasses various brain disorders that all share some scary traits: general decline in cognitive function, decreased ability to speak, and in later stages, being unable to take care of oneself. Unfortunately, as human lifespan increases […]... Read more »
Killin LO, Starr JM, Shiue IJ, & Russ TC. (2016) Environmental risk factors for dementia: a systematic review. BMC geriatrics, 16(1), 175. PMID: 27729011
Parihar VK, Allen BD, Caressi C, Kwok S, Chu E, Tran KK, Chmielewski NN, Giedzinski E, Acharya MM, Britten RA.... (2016) Cosmic radiation exposure and persistent cognitive dysfunction. Scientific reports, 34774. PMID: 27721383
- August 9, 2016
- 09:24 AM
- 248 views
Particle Acceleration and heating by turbulent reconnection by L. Vlahos, T. Pisokas, H. Isliker, V. Tsiolis and A. Anastasiadis
by CESRA in Solar Radio Science
Fermi (1949) introduced a fundamental stochastic process to solve the problem of particle energization (heating and/or acceleration) in space and astrophysical plasmas. The initial idea of Fermi with randomly moving scatterers (magnetic clouds), was soon replaced with a spectrum of low amplitude (δΒ/Β... Read more »
by L. Vlahos, T. Pisokas, H. Isliker, V. Tsiolis and A. Anastasiadis. (2016) Particle Acceleration and heating by turbulent reconnection. ApJ. info:/
- April 23, 2015
- 10:35 AM
- 1,246 views
of microwave noodles and extragalactic signals
by Greg Fish in weird things
FRBs just can’t seem to catch a break this month. First, they were an alien signal. Then just as quickly as they were attributed to aliens because the Daily Fail decided to get creative with two out of context words and no one seemed to bother to fact check them, the bursts were called a false signal caused by microwave interference. Not just any microwave interference mind you, but the kind in which you warm up leftovers [...]... Read more »
E. Petroff, E. F. Keane, E. D. Barr, J. E. Reynolds, J. Sarkissian, P. G. Edwards, J. Stevens, C. Brem, A. Jameson, S. Burke-Spolaor.... (2015) Identifying the source of perytons at the Parkes radio telescope. n/a. arXiv: 1504.02165v1
- April 13, 2014
- 01:56 PM
- 1,493 views
Intro to External Pulsed Plasma Propulsion (EPPP)
by Jason Carr in Wired Cosmos
External Pulsed Plasma Propulsion (EPPP) is something that’s been discussed for some time. In fact, it was originally proposed by Stanislaw Ulam way back in 1947. Unfortunately the public perception of atomic technology as well as pieces of otherwise well meaning legislation have called into question the feasibility of spacecraft that operate using this advanced … Read More →... Read more »
J.A. Bonometti, & P. Jeff Morton. (2012) External pulsed plasma propulsion (EPPP) analysis maturation. 36th AIAA Joint Propulsion Conference. DOI: 10.2514/6.2000-3610
- February 5, 2014
- 11:43 AM
- 1,259 views
Solving a 30-Year-Old Problem in High Mass Star Formation
by Jason Carr in Wired Cosmos
Some 30 years ago, astronomers found that regions of ionized gas around young high mass stars remain small (under a third of a light-year) for ten times longer than they should if they were to expand as expected in simple models. Recent supercomputer simulations predicted that these regions actually flicker in brightness over this period … Read More →... Read more »
C. G. De Pree, T. Peters, M.-M. Mac Low, D. J. Wilner, W. M. Goss, R. Galván-Madrid, E. R. Keto, R. S. Klessen, & A. Monsrud. (2014) Flickering of 1.3 cm Sources in Sgr B2: Toward a Solution to the Ultracompact H II Region Lifetime Problem. The Astrophysical Journal Letters, 781(L36). DOI: 10.1088/2041-8205/781/2/L36
- November 5, 2013
- 07:43 AM
- 1,287 views
What White Dwarfs Can Tell Us About the Universe
by Jason Carr in Wired Cosmos
Researchers from Europe and the U.S. have ruled out a multitude of possible parameters for dark photons - a type of dark matter and energy - with the help of white dwarfs. In some aspects, the shining of these dying stars gives more information on dark forces than is provided by earth-based laboratories. The journal … Read More →... Read more »
Herbert K. Dreiner, Jean-François Fortin, Jordi Isern, & Lorenzo Ubaldi. (2013) White Dwarfs constrain Dark Forces. Phys. Rev. D, 88(4). DOI: 10.1103/PhysRevD.88.043517
- October 25, 2013
- 11:40 AM
- 2,011 views
What Aliens From Another World Will Look Like
by Jason Carr in Wired Cosmos
Invading aliens from outer space won’t look like a Lady Gaga zombie or creatures with serious nasal drip problems. Top planetary scientists have now come up with different sketches of how aliens might appear. Here, then, are what real aliens will most likely look like if they drop on your house. First, the alien won’t … Read More →... Read more »
Ricardo Cavicchioli. (2004) Extremophiles and the Search for Extraterrestrial Life. Astrobiology, 2(3), 281-292. DOI: 10.1089/153110702762027862
Cosmovici, C., Pluchino, S., Salerno, E., Montebugnoli, S., Zoni, L., & Bartolini, M. (2007) Radio Search for Water in Exo-Planetary Systems. Extreme Solar Systems, 33. info:/
Ziurys LM. (2006) The chemistry in circumstellar envelopes of evolved stars: following the origin of the elements to the origin of life. Proceedings of the National Academy of Sciences of the United States of America, 103(33), 12274-9. PMID: 16894164
- October 16, 2013
- 10:45 AM
- 1,331 views
How the Largest Known Star is Tearing Itself Apart
by Jason Carr in Wired Cosmos
An international team of astronomers has observed part of the final death throes of the largest known star in the Universe as it throws off its outer layers. The discovery, by a collaboration of scientists from the UK, Chile, Germany and the USA, is a vital step in understanding how massive stars return enriched material … Read More →... Read more »
Nicholas J. Wright, Roger Wesson, Janet E. Drew, Geert Barentsen, Michael J. Barlow, Jeremy R. Walsh, Albert Zijlstra, Jeremy J. Drake, Jochen Eisloffel, & Hywel J. Farnhill. (2013) The Ionized Nebula surrounding the Red Supergiant W26 in Westerlund 1. Monthly Notices of the Royal Astronomical Society. arXiv: 1309.4086v1
- May 2, 2013
- 09:50 AM
- 1,370 views
Meteorites May Reveal Mars’ Secrets of Life
by Jason Carr in Wired Cosmos
In an effort to determine if conditions were ever right on Mars to sustain life, a team of scientists, including a Michigan State University professor, has examined a meteorite that formed on the red planet more than a billion years ago. And although this team’s work is not specifically solving the mystery, it is laying … Read More →... Read more »
Stopar, J., Taylor, G., Velbel, M., Norman, M., Vicenzi, E., & Hallis, L. (2013) Element abundances, patterns, and mobility in Nakhlite Miller Range 03346 and implications for aqueous alteration. Geochimica et Cosmochimica Acta, 208-225. DOI: 10.1016/j.gca.2013.02.024
- September 26, 2012
- 06:00 PM
- 1,257 views
Supernova 1006 lived fast and left no companion behind
by Kelly Oakes in Basic Space
A supernova that lit up the skies in the year 1006 lived and died fast, leaving no companion star behind, astronomers have found. The result is the latest clue in a puzzle that has been troubling astronomers for some time – how does this type of stellar explosion happen?... Read more »
Jonay I. González Hernández, Pilar Ruiz-Lapuente, Hugo M. Tabernero, David Montes, Ramon Canal, Javier Méndez, & Luigi R. Bedin. (2012) No surviving evolved companions of the progenitor of SN 1006. Nature. DOI: 10.1038/nature11447
- September 17, 2012
- 01:27 AM
- 1,477 views
What Microfossils Found in Meteorites Can Tell Us
by Jason Carr in Wired Cosmos
While most people associate the term microfossil with the strange ALH 84001 object, there are plenty of other more concrete examples of tiny fossilized organisms. Research conducted with scanning electron microscope equipment has created a wide array of scientific literature regarding these small remains of living organisms. While marine objects don’t necessary have anything to [...]... Read more »
Emmanuelle J. Javaux, Craig P. Marshall, & Andrey Bekker. (2010) Organic-walled microfossils in 3.2-billion-year-old shallow-marine siliciclastic deposits . Nature, 934-938. DOI: 10.1038/nature08793
- June 28, 2012
- 05:45 AM
- 1,091 views
Cosmic Mystery Solved?
by GDW in The Beast, the Bard and the Bot
Remember that mysterious cosmic event, hinted at in tree rings? Brief recap: Upon studying the tree rings in Japanese cedar trees, researchers found evidence for a sudden increase in 14C in the atmosphere. What, oh what, could have caused this? … Continue reading →... Read more »
Allen, J. (2012) Astronomy: Clue to an ancient cosmic-ray event?. Nature. DOI: 10.1038/486473e
Lovett, R.A. (2012) Ancient text gives clue to mysterious radiation spike. Nature. DOI: 10.1038/nature.2012.10898
- June 4, 2012
- 10:25 AM
- 1,203 views
Tree Rings and A Cosmic Mystery
by GDW in The Beast, the Bard and the Bot
Between AD 774 and 775 something weird happened. And that something weird resulted in a 12% increase of 14C (a radioactive form of carbon) in the atmosphere. How do we even know this? Tree rings. Earlier work had enabled the … Continue reading →... Read more »
Miyake, F., Nagaya, K., Masuda, K., & Nakamura, T. (2012) A signature of cosmic-ray increase in ad 774–775 from tree rings in Japan. Nature. DOI: 10.1038/nature11123
- May 8, 2012
- 01:03 PM
- 1,445 views
Looking for Earths by Looking for Jupiters
by Jason Carr in Wired Cosmos
In the search for Earth-like planets, it is helpful to look for clues and patterns that can help scientist narrow down the types of systems where potentially habitable planets are likely to be discovered. New research from a team including Carnegie’s Alan Boss narrows down the search for Earth-like planets near Jupiter-like planets. Their work [...]... Read more »
Steffen, J., Ragozzine, D., Fabrycky, D., Carter, J., Ford, E., Holman, M., Rowe, J., Welsh, W., Borucki, W., Boss, A.... (2012) Kepler constraints on planets near hot Jupiters. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1120970109
- April 23, 2012
- 07:27 AM
- 2,029 views
Robotic Telesurgery in Space
by Jason Carr in Wired Cosmos
Telemedicine is a field that uses telecommunications technology to provide healthcare at a distance. Certain computer systems can be linked to a physician’s office for diagnostic purposes. Different clinics and hospitals can be linked together. In the future, telemedicine could be used to perform robotic surgeries in space. Some forms of telemedicine have been in [...]... Read more »
Himpens J. (2012) Surgery in space: the future of robotic telesurgery (Haidegger T, Szandor J, Benyo Z. Surg Endosc 2011; 25(3):681-690). Surgical Endoscopy, 26(1), 286. PMID: 21858579
- April 20, 2012
- 01:41 PM
- 1,385 views
"Fireballs" Snuffed
by nuclear.kelly in Miss Atomic Bomb
So the story begins thusly: somewhere out there in the universe, something is producing really high energy cosmic rays. I mean, really high energy. Energies above 10^18 electronvolts (that's a one followed by eighteen zeros). That's nearly a million times more energetic than the LHC upgrade. Boggles-the-mind high energy.... Read more »
Abbasi, R., Abdou, Y., Abu-Zayyad, T., Ackermann, M., Adams, J., Aguilar, J., Ahlers, M., Altmann, D., Andeen, K., Auffenberg, J.... (2012) An absence of neutrinos associated with cosmic-ray acceleration in γ-ray bursts. Nature, 484(7394), 351-354. DOI: 10.1038/nature11068
- April 19, 2012
- 12:10 PM
- 1,405 views
The Merging of Biology and Electronics [Research]
by Jason Carr in Wired Cosmos
The boundary between electronics and biology is blurring with the first detection by researchers at Department of Energy’s Oak Ridge National Laboratory of ferroelectric properties in an amino acid called glycine. A multi-institutional research team led by Andrei Kholkin of the University of Aveiro, Portugal, used a combination of experiments and modeling to identify and [...]... Read more »
Heredia, A., Meunier, V., Bdikin, I., Gracio, J., Balke, N., Jesse, S., Tselev, A., Agarwal, P., Sumpter, B., Kalinin, S.... (2012) Nanoscale Ferroelectricity in Crystalline γ-Glycine. Advanced Functional Materials. DOI: 10.1002/adfm.201103011
- April 17, 2012
- 09:59 AM
- 1,545 views
Magnetic Fields Can Send Particles to Infinity
by Jason Carr in Wired Cosmos
I’ve always thought that if we’re ever to achieve long-range intersteller space travel, magnetics will play a fairly large role in the process. This is especially true if we’re going to get away from the dependence of currently used rocket fuel in the process. I’m not quite certain of the physics/mechanics involved (yet) but surely [...]... Read more »
Díaz-Cano, A., & González-Gascón, F. (2012) Escape to infinity in the presence of magnetic fields. Quarterly of Applied Mathematics, 70(1), 45-51. DOI: 10.1090/S0033-569X-2011-01248-4
- April 13, 2012
- 12:39 PM
- 1,527 views
A New First – Uranus Auroras Glimpsed from Earth
by Jason Carr in Wired Cosmos
For the first time, scientists have captured images of auroras above the giant ice planet Uranus, finding further evidence of just how peculiar a world that distant planet is. Detected by means of carefully scheduled observations from the Hubble Space Telescope, the newly witnessed Uranian light show consisted of short-lived, faint, glowing dots – a [...]... Read more »
Lamy, L., Gladstone, G., Barthelemy, M., Achilleos, N., Guio, P., Dougherty, M., Melin, H., Cowley, S., Stallard, T., Nichols, J.... (2012) Earth-based detection of Uranus' aurorae. Geophysical Research Letters. DOI: 10.1029/2012GL051312
- April 12, 2012
- 09:49 PM
- 2,459 views
Disassociate Galaxy Clusters
by The Astronomist in The Astronomist.
A dissociative galaxy cluster is a cluster of galaxies that just can't keep it together any longer. This may sound like an unnecessary anthropomorphication of galaxies, but it is actually a description of galaxy clusters which have collided and experienced stratification of their constituent parts. In the standard and successful model of cosmology the largest scale structures in the universe, like super clusters of thousands of galaxies, form via the merger of filamentary structures compose........ Read more »
Dawson, W., Wittman, D., Jee, M., Gee, P., Hughes, J., Tyson, J., Schmidt, S., Thorman, P., Bradač, M., Miyazaki, S.... (2012) DISCOVERY OF A DISSOCIATIVE GALAXY CLUSTER MERGER WITH LARGE PHYSICAL SEPARATION. The Astrophysical Journal, 747(2). DOI: 10.1088/2041-8205/747/2/L42
Jee, M., Mahdavi, A., Hoekstra, H., Babul, A., Dalcanton, J., Carroll, P., & Capak, P. (2012) A STUDY OF THE DARK CORE IN A520 WITH THE : THE MYSTERY DEEPENS . The Astrophysical Journal, 747(2), 96. DOI: 10.1088/0004-637X/747/2/96
Markevitch, M., Gonzalez, A., Clowe, D., Vikhlinin, A., Forman, W., Jones, C., Murray, S., & Tucker, W. (2004) Direct Constraints on the Dark Matter Self‐Interaction Cross Section from the Merging Galaxy Cluster 1E 0657−56. The Astrophysical Journal, 606(2), 819-824. DOI: 10.1086/383178
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