PDA

View Full Version : Chandra finds evidence for dark matter



ToSeek
2003-Jun-12, 05:42 PM
Hot news for cold dark matter (http://chandra.harvard.edu/press/03_releases/press_061103.html)

Manchurian Taikonaut
2004-Jun-23, 10:50 PM
There is more out on Chandra's mission..it has got more information. The more recent discoveries from the Chandra X-Ray Observatory has revealed an extremely hot region at the heart of our Milky Way galaxy. The Chandra scope looked on a region approximately 100 light-years across, and then painstakingly removed the glow from more than 2,500 point sources of X-ray radiation (neutron stars, black holes...). :D What then remained after was the characteristic radiation from gas being heated to 100 million degrees which is very hot indeed. It now could be that the glow isn't coming from gas, but a collection of point sources, like a cluster of 200,000 neutron stars, this shows what a great discovery it is .

Normandy6644
2004-Jun-23, 10:53 PM
The Abell cluster is the one I was looking into studying using gravitational lensing, so this is good news because it gives some comparative data. Always nice to check your answers...

Squink
2004-Jun-24, 12:46 AM
How cold is this slow dark matter?
Is it moving too quickly to be trapped by the gravity field of say, the Sun or the earth?
Surely black holes at least are surrounded by accretion disks of these mystery particles?