C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET21:51:06

2009A&A...496...25P - Astronomy and Astrophysics, volume 496, 25-30 (2009/3-2)

An analysis of electron distributions in galaxy clusters by means of the flux ratio of iron lines FeXXV and XXVI.


Abstract (from CDS):

The interpretation of hard X-ray emission from galaxy clusters is still ambiguous and different proposed models can be probed using various observational methods. Here we explore a new method based on Fe-line observations. Spectral-line emissivities have usually been calculated by assuming a Maxwellian electron distribution. In this paper, a generalized approach to calculating the iron-line flux for a modified Maxwellian distribution is considered. We calculated the flux ratio of iron lines for various possible populations of electrons proposed to account for measurements of hard X-ray excess-emission from the clusters A2199 and Coma. We found that the influence of the suprathermal electron population on the flux ratio is more significant in low temperature clusters (as Abell 2199) than in high temperature clusters (as Coma).

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: clusters: general - X-rays: galaxies: clusters

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4319 2
2 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1116 1

    Equat.    Gal    SGal    Ecl

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