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Chandra Data Helps Solve The Puzzle Of Why Galaxy Clusters

Chandra Data Helps Solve The Puzzle Of Why Galaxy Clusters Contain So Few Stars

Chuck Bednar for redOrbit.com - Your Universe Online New observations of the Perseus and Virgo galaxy clusters made using NASA’s Chandra X-ray Observatory suggest that turbulence may be the reason that hot gas there has been unable to cool,...

Latest X-ray Stories

2014-10-27 16:27:33

DUBLIN, Oct. 27, 2014 /PRNewswire/ -- Research and Markets has announced the addition of the "Security Screening Market by Product, By Application, And by Geography - Analysis and Forecast to 2013 - 2020" report to their offering. http://photos.prnewswire.com/prnvar/20130307/600769 Security screening involves scanning of individuals and their belongings to avoid economic, financial, and personal losses at various places. In this report, the security screening market has been segmented on the...

2014-10-27 16:20:29

WASHINGTON, Oct. 27, 2014 /PRNewswire-USNewswire/ -- The same phenomenon that causes a bumpy airplane ride, turbulence, may be the solution to a long-standing mystery about stars' birth, or the absence of it, according to a new study using data from NASA's Chandra X-ray Observatory. http://photos.prnewswire.com/prnvar/20081007/38461LOGO Galaxy clusters are the largest objects in the universe, held together by gravity. These behemoths contain hundreds or thousands of individual galaxies...

dark matter
2014-10-21 04:47:25

April Flowers for redOrbit.com - Your Universe Online For decades, space scientists have been trying to prove, or disprove, the existence of axions — which were first postulated in 1977 by the Peccei–Quinn theory. A new study from the University of Leicester, published in the Monthly Notices of the Royal Astronomical Society, describes the detection of a curious signal in the X-ray sky which may prove the axion particle really exists. The findings also provide tantalizing insight into...

2014-10-14 08:32:44

PALO ALTO, Calif., Oct. 14, 2014 /PRNewswire/ -- Varian Medical Systems (NYSE: VAR) announced today that its management will hold a year-end review for investors from 11:30 a.m. through 1:30 p.m. on November 5, 2014 at The Westin New York Grand Central, 212 E. 42(nd) St, New York. Management presentations will cover financial performance through fiscal year 2014, strategic initiatives, and growth opportunities in markets for oncology systems and x-ray imaging. Varian management...

2014-10-10 23:02:08

The Nuclear Spectroscopic Telescope Array, or NuSTAR, recently spotted the brightest pulsar ever recorded using X-ray optics designed by a team that included researchers from the Lawrence Livermore National Laboratory. Livermore, California (PRWEB) October 10, 2014 A supernova is the cataclysmic death of a star, but it seems its remnants shine on. Astronomers have found a pulsating, dead star beaming with the energy of about 10 million suns. This is the brightest pulsar -- a dense stellar...

2014-10-08 20:22:33

DUBLIN, October 8, 2014 /PRNewswire/ -- Research and Markets (http://www.researchandmarkets.com/research/lkh43q/radiation) have announced the addition of the "Radiation Detection Markets: 2014-2021" [http://www.researchandmarkets.com/research/lkh43q/radiation ] report to their offering. (Logo: http://photos.prnewswire.com/prnh/20130307/600769 ) This report follows on from successful reports on radiation detection equipment and radiation detection materials in...

2014-10-08 16:20:24

WASHINGTON, Oct. 8, 2014 /PRNewswire-USNewswire/ -- Astronomers have found a pulsating, dead star beaming with the energy of about 10 million suns. This is the brightest pulsar - a dense stellar remnant left over from a supernova explosion - ever recorded. The discovery was made with NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR. http://photos.prnewswire.com/prnvar/20081007/38461LOGO "You might think of this pulsar as the 'Mighty Mouse' of stellar remnants," said Fiona...

2014-10-07 23:03:59

A class of molecules 100 – 1,000 times more energetic than typical has been discovered by Dr. Young K. Bae, a physicist at Y.K. Bae Corporation, Advanced Space and Energy Technologies under the auspices of DTRA (Defense Threat Reduction Agency). Tustin, CA (PRWEB) October 07, 2014 A class of molecules 100 – 1,000 times more energetic than typical has been discovered by Dr. Young K. Bae, a physicist at Y.K. Bae Corporation, Advanced Space and Energy Technologies under the auspices of...

2014-10-06 23:06:16

The market report for security screening covers the market data and information with regard to the market drivers, trends and opportunities, key players, and competitive outlook. (http://www.marketsandmarkets.com/Market-Reports/security-screening-market-264685413.html) (PRWEB) October 06, 2014 According to a new market research report "Security Screening Market by Product (X-ray & biometric screening system, EDT, and metal detector), by Application (Airport, Government, Border...

2014-10-01 23:07:27

The market report for security screening covers the market data and information with regard to the market drivers, trends and opportunities, key players, and competitive outlook. (http://www.marketsandmarkets.com/Market-Reports/security-screening-market-264685413.html) (PRWEB) October 01, 2014 According to a new market research report "Security Screening Market by Product (X-ray & biometric screening system, EDT, and metal detector), by Application (Airport, Government, Border...


Latest X-ray Reference Libraries

45_690367cb500d467ab67d8f7503f9bc96
2010-09-07 17:13:57

Abell 2142, also called A2142 and located in the constellation Corona Borealis, is an X-ray luminous galaxy cluster. Its creation is due to the merger between two galaxy clusters. It is one of the largest objects in the universe and is six million light years across. It holds hundreds of galaxies and enough gas to make a thousand more. The pressure fronts in the system have been traced in detail and are relatively cool 50 million degree Celsius. The central region is embedded in large...

7_d6897d09acee1dd0c34d0fbf62ff7d0b2
2004-10-19 04:45:44

X-Ray Astronomy -- Although the more energetic X-rays (E > 30 keV) can penetrate the air at least for distances of a few meters (they would never have been detected and medical X-ray machines would not work if this was not the case) the Earth's atmosphere is thick enough that virtually none are able to penetrate from outer space all the way to the Earth's surface. X-rays in the 0.5 - 5 keV range, where most celestial sources give off the bulk of their energy, can be stopped by a few...

6_1446abbc556d86191d7944d6c5cf68052
2004-10-19 04:45:43

X-ray Burster -- X-ray bursters are a class of binary stars which are luminous in X-rays. They contain a neutron star and a low-mass companion star. The companion fills its Roche lobe and therefore the neutron star is accreting matter from it. The inflowing gas forms an accretion disk around the neutron star. Sometimes X-ray bursters show a sudden increase in their X-ray luminosity, called X-ray burst. All properties of the X-ray bursts can be explained assuming that they result from...

6_48ed76f36ff2f4ed0ad83a22964029652
2004-10-19 04:45:43

X-ray Binaries -- X-ray binaries are a class of binary stars that are very luminous in X-rays. The X-rays are produced by matter falling from one component (usually a relatively normal star) to the other component, which is a neutron star or a black hole. The infalling matter releases gravitational potential energy, up to several tens of per cent of its rest mass as X-rays. (Hydrogen fusion releases about 0.7 per cent of rest mass) X-ray binaries are further subdivided into...

6_f1577ee462b741c03ef6a7d23d2cd6905
2004-10-19 04:45:43

Variable Star -- Most stars are of nearly constant luminosity. Our own Sun is a good example which goes through practically no measurable variation in brightness. There are, however, stars which do vary in brightness, called variable stars. They fall into two main groups: Intrinsic variables These are stars which have intrinsic variations in brightness, that is the star itself gets brighter and dimmer. There are many types of intrinsic variables, the main types being: -- Mira...

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Word of the Day
maffling
  • To stammer.
  • Present participle of maffle, to stammer.
  • A simpleton.
The word 'maffle' may come from a Dutch word meaning 'to move the jaws' or a French word meaning 'having large cheeks'.