The deepest X-ray look at the Universe

Details The deepest X-ray look at the Universe The deepest X-ray look at the Universe

2001-08-28

arxiv.org/abs/astro-ph/0108445v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication on ApJL. Two figures, requires emulateapj5 (included)

Scientific paper

10.1086/324014

The origin of the X-ray background, in particular at hard (2-10 keV) energies, has been a debated issue for more than 30 years. The Chandra deep fields provide the deepest look at the X-ray sky and are the best dataset to study the X-ray background. We searched the Chandra Deep Field South for X-ray sources with the aid of a dedicated wavelet-based algorithm. We are able to reconstruct the Log N-Log S source distribution in the soft (0.5-2 keV) and hard (2-10 keV) bands down to limiting fluxes of 2x10^{-17} erg s^{-1} cm^{-2} and 2x10^{-16} erg s^{-1} cm^{-2}, respectively. These are a factor ~5 deeper than previous investigations. We find that the soft relation continues along the extrapolation from higher fluxes, almost completely accounting for the soft X-ray background. On the contrary, the hard distribution shows a flattening below ~2x10^{-14} erg s^{-1} cm^{-2}. Nevertheless, we can account for >68% of the hard X-ray background, with the main uncertainty being the sky flux itself.

Affiliated with

Also associated with

No associations

Rating

The deepest X-ray look at the Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The deepest X-ray look at the Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The deepest X-ray look at the Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-101434