Evolution and Statistics from the Number Counts of X-Ray Cluster and Intergalactic Medium

1991 ◽  
pp. 569-570
Author(s):  
Hitoshi Hanami
Keyword(s):  
Intergalactic Medium ◽  
X Ray ◽  
Number Counts

scholarly journals X-ray ionization of the intergalactic medium by quasars

2018 ◽  
Vol 479 (4) ◽  
pp. 4320-4335 ◽  
Author(s):  
Luca Graziani ◽  
B Ciardi ◽  
M Glatzle
Keyword(s):  
Intergalactic Medium ◽  
X Ray

scholarly journals Detecting shocked intergalactic gas with X-ray and radio observations

2019 ◽  
Vol 627 ◽  
pp. A5 ◽  
Author(s):  
F. Vazza ◽  
S. Ettori ◽  
M. Roncarelli ◽  
M. Angelinelli ◽  
M. Brüggen ◽  
...  
Keyword(s):  
Large Scale ◽  
Intergalactic Medium ◽  
Thermal Emission ◽  
Intergalactic Gas ◽  
Radio Observations ◽  
X Ray ◽  
Large Scale Structures ◽  
Hot Gas ◽  
Scale Structures ◽  
Radio Band

Detecting the thermal and non-thermal emission from the shocked cosmic gas surrounding large-scale structures represents a challenge for observations, as well as a unique window into the physics of the warm-hot intergalactic medium. In this work, we present synthetic radio and X-ray surveys of large cosmological simulations in order to assess the chances of jointly detecting the cosmic web in both frequency ranges. We then propose best observing strategies tailored for existing (LOFAR, MWA, and XMM) or future instruments (SKA-LOW and SKA-MID, Athena, and eROSITA). We find that the most promising targets are the extreme peripheries of galaxy clusters in an early merging stage, where the merger causes the fast compression of warm-hot gas onto the virial region. By taking advantage of a detection in the radio band, future deep X-ray observations will probe this gas in emission, and help us to study plasma conditions in the dynamic warm-hot intergalactic medium with unprecedented detail.

The Fall of Active Galactic Nuclei and the Rise of Star-forming Galaxies: A Close Look at the Chandra Deep Field X-Ray Number Counts

2004 ◽  
Vol 128 (5) ◽  
pp. 2048-2065 ◽  
Author(s):  
F. E. Bauer ◽  
D. M. Alexander ◽  
W. N. Brandt ◽  
D. P. Schneider ◽  
E. Treister ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
X Ray ◽  
Star Forming ◽  
Number Counts

scholarly journals Hot Gas in Groups and Their Galaxies

1998 ◽  
Vol 188 ◽  
pp. 61-64
Author(s):  
Trevor J. Ponman ◽  
Alexis Finoguenov
Keyword(s):  
Star Formation ◽  
Intergalactic Medium ◽  
Heavy Elements ◽  
X Ray ◽  
Hot Gas ◽  
Group Environment ◽  
Velocity Dispersions

It is clear that there is an important interplay between galaxies and the group environment. At the velocity dispersions (~ 100 km s−1) characteristic of groups, the galaxies interact strongly, leading to triggering of star formation, and galaxy merging. We can expect to see evidence of such processes through differences in the properties of galaxies in groups compared to field galaxies. Conversely, the galaxies affect their environment, as is apparent from the presence of heavy elements in the hot intergalactic medium (IGM) in groups, which emit characteristic X-ray lines.

scholarly journals Heating and Ionization of the Intergalactic Medium by an Early X‐Ray Background

2001 ◽  
Vol 563 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Aparna Venkatesan ◽  
Mark L. Giroux ◽  
J. Michael Shull
Keyword(s):  
Intergalactic Medium ◽  
X Ray ◽  
X Ray Background

scholarly journals Galaxies and the intergalactic medium in groups

2000 ◽  
Vol 174 ◽  
pp. 187-196
Author(s):  
Trevor J. Ponman ◽  
Ed Lloyd-Davies ◽  
Stephen F. Helsdon
Keyword(s):  
Galaxy Formation ◽  
Intergalactic Medium ◽  
Preliminary Evidence ◽  
Early Type ◽  
Present Evidence ◽  
X Ray ◽  
Hot Gas ◽  
Isolated Galaxies ◽  
The Relationship

AbstractThe study of the relationship between the hot gas in groups and the galaxies they contain can help to constrain the evolution of both galaxies and groups. Here we present evidence that the intergalactic medium in groups has been strongly affected by preheating associated with galaxy formation which mostly preceded group collapse. The presence of this effect appears to be unrelated to the morphology of group galaxies, which supports models in which galaxy types are not primordial. We also present preliminary evidence that early-type galaxies in groups are not underluminous in the X-ray compared to isolated galaxies, suggesting that their dark halos may not have been substantially stripped.

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