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  • November 29, 2013
  • 07:34 PM
  • 838 views

What is the age of Mars crust?

by Usman Paracha in SayPeople

Main Point:

Scientists have estimated the age of Mars crust by studying zircons found within the Martian meteorite NWA 7533. Age of crust of red plant is found to be about 4.43 million years.



Published in:

Nature

Study Further:

The meteorite NWA (North West Africa) 7533 was discovered by Bedouin tribesmen in the Sahara desert. It is chemically similar to Martian soil analyzed by Martian Rovers that enables the researchers to study the Martian crustal processes and conditions. ........ Read more »

  • November 28, 2013
  • 08:22 PM
  • 664 views

Galaxy may contain black holes of about 100 times the mass of our sun

by Usman Paracha in SayPeople

Main Point:

Scientists have reported that presence of such black holes that are neither very large nor very small.

Published in:

arXiv

Study Further:

For a long time, scientists were aware of only two types of black holes. One of the types is about the masses of only 10 times that of our sun and the other is about the masses of 10 billion suns, which are also known as supermassive black holes, i.e. there are only two extremes. Supermassive black holes are present at the heart of g........ Read more »

Matteo Bachetti, Vikram Rana, Dominic J. Walton, Didier Barret, Fiona A. Harrison, Steven E. Boggs, Finn E. Christensen, William W. Craig, Andrew C. Fabian, Felix Fürst.... (2013) The ultraluminous X-ray sources NGC 1313 X-1 and X-2: a broadband study with NuSTAR and XMM-Newton. arXiv. arXiv: 1310.0745v3

  • November 26, 2013
  • 08:08 AM
  • 839 views

Lonely galaxy shows more fuel and star formation than groups of galaxies

by Usman Paracha in SayPeople

Main Point:

Scientists have reported that galaxies in groups might have less gas than lonely galaxies. This gas acts as fuel and is helpful in production of more stars.

Published in:

Monthly Notices of the Royal Astronomical Society (MNRAS)

Study Further:

Present Research:

A team of astronomers used Arecibo radio telescope and measured the hydrogen content of 250 galaxies in different locations and found that lonely galaxies have more gas than the group of galaxies.

Intergal........ Read more »

  • November 22, 2013
  • 07:08 PM
  • 703 views

Our Earth may have clues to study universe through neutrinos

by Usman Paracha in SayPeople

Main Point:

Scientists have found the neutrinos that are far beyond the known energy of neutrinos expected to be produced in the Earth’s atmosphere.

Published in:

Science

Study Further:

Neutrino:

Neutrinos are the elementary particles that are thought to be produced outside of our solar system. High-energy neutrinos have the ability to pass through normal matter and billions of them pass through Earth every second.

The IceCube neutrino observatory at the South Pole pre........ Read more »

  • November 22, 2013
  • 05:13 AM
  • 1,247 views

Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector

by Perikis Livas in Chilon

Featured article
Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector

We report on results of an all-sky search for high-energy neutrino events interacting within the IceCube neutrino detector conducted between May 2010 and May 2012.
Science | DOI: 10.1126/science.1242856

Further Reading and Links

IceCube pushes neutrinos to the forefront of astronomy
“This is the first indication of very high-energy neutrinos coming from outside our solar system, with en........ Read more »

  • November 20, 2013
  • 07:30 PM
  • 806 views

Trace evidences of life could potentially be found in craters on other planets

by Usman Paracha in SayPeople

Main Point:

Scientists have found that asteroid and comet impact craters must be our priorities in finding the evidences of life on other planets.

Published in:

Nature Geoscience

Study Further:

In the present study, scientists have found complex organic material enclosed in glassy ejecta, produced during a meteor impact in western Tasmania about 800,000 years ago. The impact crated the 1.2-kilometre wide Darwin Crater, near Queenstown, Tasmania.

"When large meteors strike ........ Read more »

Kieren Torres Howard et al. (2013) Biomass preservation in impact melt ejecta. Nature Geoscience. DOI: 10.1038/ngeo1996  

  • November 20, 2013
  • 07:01 PM
  • 635 views

Jet of high-energy particles is actually coming out from Sagittarius A*

by Usman Paracha in SayPeople

Main Point:

NASA’s astronomers have finally found the evidence of jet of high-energy particles coming out from Sagittarius A* (Sgr A*).

Published in:

The Astrophysical Journal

Study Further:

Sagittarius A* (Sgr A*):

Sgr A* is the supermassive black hole at the center of the Milky Way. It is about 4 million times more massive than our Sun and is present about 26,000 light years away from us.

Jets of high-energy particles:

These jets are usually produced by young star........ Read more »

Zhiyuan Li, Mark R. Morris, & Frederick K. Baganoff. (2013) Evidence for A Parsec-scale Jet from The Galactic Center Black Hole: Interaction with Local Gas. arXiv. arXiv: 1310.0146v1

  • November 19, 2013
  • 08:31 AM
  • 634 views

Scientists have spotted the movement of hot gas from NGC 5044

by Usman Paracha in SayPeople

Main Point:

Astronomers were studying galaxy group NGC 5044 and found the passage of gases from host galaxy group to the nearby passing galaxy NGC 5054.

Published in:

arXiv, accepted for publication in MNRAS

Study Further:

“Galaxies are social beasts that are mostly found in groups or clusters – large assemblies of galaxies that are permeated by even larger amounts of diffuse gas. With temperatures of 10 million degrees or more, the gas in galaxy groups and clusters is........ Read more »

Ewan O'Sullivan, Laurence P. David, & Jan M. Vrtilek. (2013) The impact of sloshing on the intra-group medium and old radio lobe of NGC 5044. arXiv. arXiv: 1310.2163v2

  • November 14, 2013
  • 08:18 AM
  • 1,196 views

Black hole jets pack a powerful punch

by Perikis Livas in Chilon

Article
Black hole jets pack a powerful punch

High-speed ‘jets’ spat out by black holes pack a lot of power because they contain heavy atoms, astronomers have found.

“Jets from supermassive black holes help determine a galaxy’s fate.”

Dr Tasso Tzioumis, CSIRO

ESA

ESA XMM-Newton Mission Overview
(Report) Black hole boasts heavyweight jets
Mesons | Hyper Physics | Georgia State niversity

NATURE | LETTER

Baryons in the relativistic jets of the ........ Read more »

María Díaz Trigo, James C. A. Miller-Jones, Simone Migliari, Jess W. Broderick, & Tasso Tzioumis. (2013) Baryons in the relativistic jets of the stellar-mass black-hole candidate 4U 1630-47. Nature. DOI: 10.1038/nature12672  

  • November 12, 2013
  • 02:31 AM
  • 873 views

Simulations showed that life could be trasferred from Earth to other planets – Related research suggestion

by Usman Paracha in SayPeople

Main Point:

Scientists have proposed that the primitive life forms on terrestrial planets can be ejected into space from where they would be carried to the other planets, and moons of the Jupiter and Saturn to generate life. This report is supporting the concept of lithopanspermia.

Published in:

arXiv - accepted for publication in Astrobiology

Study Further:

In the present study, scientists performed simulations to find the places where the rocks and other small celestial bodies w........ Read more »

R. J. Worth, Steinn Sigurdsson, & Christopher H. House. (2013) Seeding Life on the Moons of the Outer Planets via Lithopanspermia. arXiv. arXiv: 1311.2558v1

  • November 11, 2013
  • 05:16 AM
  • 646 views

“B-Machine Polarimeter” to study CMB polarization

by Usman Paracha in SayPeople

Main Point:

“B-Machine Polarimeter” is a telescope to measure the polarization of the cosmic microwave background (CMB).

Published in:

arXiv

Study Further:

B-Machine telescope was the project of Brian Dean Williams from University of California at Santa Barbara. This machine has been named for mapping the B-modes and is placed at a high altitude site of White Mountain Research Station (WMRS) at Barcroft, California. B-mode signals help in measuring the projected mass d........ Read more »

  • November 8, 2013
  • 07:51 PM
  • 839 views

Proposition of giant monopoles as potential dark matter candidates

by Usman Paracha in SayPeople

Main Point:

Scientists have proposed that giant 't Hooft-Polyakov monopole could be the potential candidates for dart matter.

Published in:

arXiv

Study Further:

Dark Matter:

In astronomy and cosmology, dark matter is a matter - neither a planet nor a star - hypothesized to exist in the universe because of observed gravitational effects. It is thought to comprise a substantial part of the mass of the universe but remains as yet undetected by direct observation.

By compos........ Read more »

Jarah Markar Evslin. (2013) Giant monopoles as a dark matter candidate. arXiv. arXiv: 1311.1627v1

  • November 7, 2013
  • 06:55 PM
  • 727 views

Black Holes in Globular Star Clusters probably disapproved 4 decades old theory

by Usman Paracha in SayPeople

Main Point:

Scientists have found black holes in globular star clusters for the first time with the help of an array of radio telescopes.

Published in:

The Astrophysical Journal

Study Further:

Scientist detected the black holes by detecting certain radio frequency released by the black holes.

“As the black hole eats a star, these jets of material are coming out,” Tom Maccarone, an associate professor of physics, said. “Most of the material falls into the black........ Read more »

Laura Chomiuk, Jay Strader, Thomas J. Maccarone, James C. A. Miller-Jones, Craig Heinke, Eva Noyola, Anil C. Seth, & Scott Ransom. (2013) A Radio-Selected Black Hole X-ray Binary Candidate in the Milky Way Globular Cluster M62. arXiv. arXiv: 1306.6624v2

  • November 7, 2013
  • 04:49 AM
  • 655 views

An unusual main-belt comet with many tails

by Usman Paracha in SayPeople

Main Point:

Astronomers have reported an unusual comet that has an extraordinary system of six dust tails differentiating it from other such objects.

Published in:

arXiv. Accepted for publication in The Astrophysical Journal Letters

Study Further:

Scientists used Hubble Space Telescope observations to study the unusual comet named as P/2013 P5.

P/2013 P5 was announced on August 27, 2013. It has an asteroid like orbit but possesses comet like appearance. This dual type of nature........ Read more »

David Jewitt, Jessica Agarwal, Harold Weaver, Max Mutchler, & Stephen Larson. (2013) The Extraordinary Multi-Tailed Main-Belt Comet P/2013 P5. arXiv. arXiv: 1311.1483v1

  • November 6, 2013
  • 07:58 PM
  • 662 views

Formation of early supermassive black holes

by Usman Paracha in SayPeople

Main Point:

Researchers have found that early supermassive black holes probably formed as twins and then they merged into a single supermassive object.

Published in:

arXiv accepted for publication in Physical Review Letters

Study Further:

Black holes:

Black holes are the objects in space thought to contain such a strong gravitational pull that no matter or energy, not even light, can escape from it. Black holes are believed to form when stars collapse in upon themselves.

The........ Read more »

C. Reisswig, C. D. Ott, E. Abdikamalov, R. Haas, P. Moesta, & E. Schnetter. (2013) Formation and Coalescence of Cosmological Supermassive Black Hole Binaries in Supermassive Star Collapse. arXiv. arXiv: 1304.7787v2

  • November 6, 2013
  • 04:41 AM
  • 852 views

Largest structure in the universe according to gamma ray bursts has been reported

by Usman Paracha in SayPeople

Main Point:

Scientists have reported the largest structure in the universe that is over six times larger than Sloan Great Wall (SGW) and over two times larger than the largest known structure referred to as the Huge Large Quasar Group (Huge-LQG also called U1.27) found in January, 2013.

Published in:
arXiv

Study Further:

“Great Wall”:

In 1989, scientists found a huge object in the universe that is about 0.65 billion light years across. They called it “Great Wall........ Read more »

I. Horvath, J. Hakkila, & Z. Bagoly. (2013) The largest structure of the Universe, defined by Gamma-Ray Bursts. arXiv. arXiv: 1311.1104v1

  • November 5, 2013
  • 07:43 AM
  • 1,427 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  

  • November 5, 2013
  • 04:15 AM
  • 624 views

About one in five Sun-like stars have Earth-sized planets

by Usman Paracha in SayPeople

Main Point:

Scientists have found that about 22% of Sun-like Stars have the planets in the habitable zone. These planets are comparable to the size of the Earth.

Published in:

PNAS

Study Further:

Kepler telescope:

Kepler spacecraft was launched by NASA on March 7, 2009. Its main objective is to find the places in the universe which are just like Earth. It has observed the brightness of over 150,000 stars, recording a measurement every 30 minutes.

Present Study:

In the fie........ Read more »

  • November 3, 2013
  • 03:28 PM
  • 1,243 views

The puzzling end of a black hole

by Perikis Livas in Chilon

Do black holes exist for ever ?
According to Hawking radiation, a black hole completely evaporates away within a finite time.

Three basic alternate scenarios are examined in this feature.

Articles
Black holes shrink but endure | Nature
Astrophysical black holes may radiate, but they do not evaporate | Cornell University Library... Read more »

George F R Ellis. (2013) Astrophysical black holes may radiate, but they do not evaporate. Cornell University Library. arXiv: 1310.4771v2

  • November 3, 2013
  • 11:56 AM
  • 1,019 views

Physicists Find Black Holes in Globular Star Clusters, Upsetting 40 Years of Theory

by Perikis Livas in Chilon

Introduction

The discovery of two black holes in a globular star cluster challenges scientists.
Stars’ collisions that happen in a cluster were thought to kick out any black holes that formed like water molecules that get hot enough to turn to steam and they are let go from their environment to float off into the atmosphere even though the coffee may be below the boiling temperature of water.

This feature includes a Texas Tech University’s article Physicists Find Black Holes i........ Read more »

Laura Chomiuk, Jay Strader, Thomas J. Maccarone, James C. A. Miller-Jones, Craig Heinke, Eva Noyola, Anil C. Seth, & Scott Ransom. (2013) A Radio-Selected Black Hole X-ray Binary Candidate in the Milky Way Globular Cluster M62. Cornell University Library. DOI: arXiv:1306.6624v2  

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