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IPM
30
YEARS OLD

“School of Astronomy”

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Paper   IPM / Astronomy / 13914
School of Astronomy
  Title:   IGM Heating and AGN activity in Fossil Galaxy Groups
  Author(s): 
1.  H. Miraghaei
2.  H.G. Khosroshahi
3.  H.R. Klockner
4.  T.J. Ponman
5.  N.N. Jetha
6.  S. Raychaudhury
  Status:   Published
  Journal: IAU
  Vol.:  304
  Year:  2014
  Pages:   2
  Supported by:  IPM
  Abstract:
Fossil galaxy groups are energetically and morphologically ideal environments to study the intergalactic medium (IGM) heating, because their inter-galactic gas is undisturbed due to the lack of recent group scale mergers. We study the role of active galactic nuclei (AGN) in heating the IGM in a sample of five fossil galaxy groups by employing properties at 610 MHz and 1.4 GHz. We find that two of the dominant galaxies in fossil groups, ESO 3060170 and RX J1416.4+2315, are associated with the radio lobes. We evaluate the PdV work of the radio lobes and their corresponding heating power and compare to the X-ray emission loss within cooling radius. Our results show that the power due to mechanical heating is not sufficiently high to suppress the cooling.

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