Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-03-05
Astronomy and Astrophysics
Astrophysics
9 pages, A&A, in press, minor language changes
Scientific paper
10.1051/0004-6361:20066591
We present the results of spectroscopic observations of galaxies associated with the diffuse X-ray emitting structure discovered by Zappacosta et al. (2002). After measuring the redshifts of 161 galaxies, we confirm an overdensity of galaxies with projected dimensions of at least 2 Mpc, determine its spectroscopic redshift in z=0.401+/-0.002, and show that it is spatially coincident with the diffuse X-ray emission. This confirms the original claim that this X-ray emission has an extragalactic nature and is due to the Warm-Hot Intergalactic Medium (WHIM). We used this value of the redshift to compute the temperature of the emitting gas. The resulting value depends on the metallicity that is assumed for the IGM, and is constrained to be between 0.3 and 0.6 keV for metallicities between 0.05 and 0.3 solar, in good agreement with the expectations from the WHIM.
Bonnoli Giacomo
Maiolino Roberto
Mannucci Filippo
Pedani Marco
Zappacosta Luca
No associations
LandOfFree
A galaxy overdensity at z=0.401 associated with an X-ray emitting structure of Warm-Hot Intergalactic Medium 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 galaxy overdensity at z=0.401 associated with an X-ray emitting structure of Warm-Hot Intergalactic Medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A galaxy overdensity at z=0.401 associated with an X-ray emitting structure of Warm-Hot Intergalactic Medium will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-113394