A Shadow of the Diffuse Extragalactic Background

Details A Shadow of the Diffuse Extragalactic Background A Shadow of the Diffuse Extragalactic Background

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.5802b&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #58.02; Bulletin of the American Astronomical Society, Vol. 33, p.870

Astronomy and Astrophysics

Astronomy

Scientific paper

The majority of baryons in the local universe are expected to lie outside of galaxies, in modest overdensity regions of the universe. This gas is predicted to be 106-10^7 K and emit X-rays that can constitute 10-30% of the X-ray background near 0.75 keV. If present, the gas in an edge-on galaxy would absorb this diffuse background emission, causing a shadow. We carried out this test using Chandra observations of the edge-on galaxy NGC 891, and in a region defined by the optical extinction and the HI, we detect a shadow in the 0.4-1.0 keV band at the 98% confidence level. This shadow corresponds to approximately 20% of the total point source plus diffuse X-ray background in this energy range, and is consistent with predictions.

Affiliated with

Also associated with

No associations

Rating

A Shadow of the Diffuse Extragalactic Background 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 A Shadow of the Diffuse Extragalactic Background, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Shadow of the Diffuse Extragalactic Background will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1269986