SIMBAD references

2008ApJ...685..858F - Astrophys. J., 685, 858-862 (2008/October-1)

Bent-double radio sources as probes of intergalactic gas.


Abstract (from CDS):

As the most common environment in the universe, groups of galaxies are likely to contain a significant fraction of the missing baryons in the form of intergalactic gas. The density of this gas is an important factor in whether ram pressure stripping and strangulation affect the evolution of galaxies in these systems. We present a method for measuring the density of intergalactic gas using bent-double radio sources that is independent of temperature, making it complementary to current absorption-line measurements. We use this method to probe intergalactic gas in two different environments, inside a small group of galaxies as well as outside of a larger group at a 2 Mpc radius, and measure total gas densities of 4±1+6–2x10–3/cm3 and 9±3+10–5x10–4/cm3 (random and systematic errors), respectively. We use X-ray data to place an upper limit of 2x106 K on the temperature of the intragroup gas in the small group.

Abstract Copyright:

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Jets - Galaxies: Intergalactic Medium

CDS comments: Parag. 2 : S1 and S2 are respectively FIRST J124942.2+303838 and SDSS J085331.86+232400.0

Simbad objects: 6

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