Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-08-26
Science, published on line August 9, 2001. Print version to be published on August 31, 2001
Astronomy and Astrophysics
Astrophysics
three figures (two of them jpg files)
Scientific paper
10.1126/science.1063529
The Galactic plane is a strong hard x-ray emitter and the emission forms a narrow continuous ridge. The currently known hard x-ray sources are far too few to explain the ridge x-ray emission, and the fundamental question as to whether the ridge emission is ultimately resolved into numerous dimmer discrete sources or truly diffuse emission has not yet been settled. In order to obtain a decisive answer, using the Chandra x-ray observatory, we have carried out the deepest hard x-ray survey of a Galactic plane region which is devoid of known x-ray point sources. We have detected at least 36 new hard x-ray point sources in addition to strong diffuse emission within a 17' x 17' field of view. The surface density of the point sources is comparable to that at high Galactic latitudes after the effects of Galactic absorption are considered. Therefore, most of these point sources are probably extragalactic, presumably active galaxies seen through the Galactic disk. The Galactic ridge hard x-ray emission is diffuse, which indicates omnipresence of the hot plasma along the Galactic plane whose energy density is more than one order of magnitude higher than any other substances in the interstellar space.
Ebisawa Ken
Kaneda Hidehiro
Maeda Yoshitomo
Yamauchi Shigeo
No associations
LandOfFree
Origin of the Hard X-ray Emission from the Galactic Plane 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 Origin of the Hard X-ray Emission from the Galactic Plane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Origin of the Hard X-ray Emission from the Galactic Plane will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-387195