Mathematics – Logic
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3178s&link_type=abstract
ATNF proposal C2340, Semester: April, 2010
Mathematics
Logic
Active Galactic Nuclei / Quasars, Atca
Scientific paper
One of the key challenges today is to account for nearly half of the baryons in the present day universe that are missing. These missing baryons are thought to pervade the moderate over-density filaments (with fractional overdensity ~ 10 to 100) of the large-scale structure as a Warm-Hot intergalactic medium (WHIM) of 10^5 to 10^7 K gas. The state of the gas is a consequence of the hydrodynamic infall heating and, more importantly, the astrophysical feedbacks on the environment from galaxy formation and evolution. We propose to use a sample of giant radio galaxies embedded in the filaments, with radio jets that interact with the gas beyond and outside of their host galaxy, as a probe of the WHIM. Modeling the jet-WHIM interaction and the evolution of the radio synchrotron plasma lobes in the gas and gravitational field of the surrounding large-scale structure constitutes a novel method of constraining the physical parameters and cosmological evolution of the WHIM gas, and thereby assessing the importance of feedback from galaxy evolution on the state of this gas.
Jones Heath
Saripalli Lakshmi
Staveley--Smith Lister
Subrahmanyan Ravi
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