2009A&A...508...69P


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.01CEST03:40:15

2009A&A...508...69P - Astronomy and Astrophysics, volume 508, 69-74 (2009/12-2)

On the influence of high energy electron populations on metal abundance estimates in galaxy groups and clusters.

PROKHOROV D.A.

Abstract (from CDS):

Spectral line emissivities have usually been calculated for a Maxwellian electron distribution. But many theoretical works on both galaxy groups and clusters and the solar corona consider modified Maxwellian electron distribution functions when fitting observed X-ray spectra. Here we examine the influence of high energy electron populations on measurements of metal abundances. A generalized approach proposed by ourselves is used to calculate the line emissivities for a modified Maxwellian distribution. We study metal abundances in galaxy groups and clusters in which hard X-ray excess emission was observed. We found that for modified Maxwellian distributions the argon abundance decreases for the HCG 62 group, the iron abundance decreases for the Centaurus cluster, and the oxygen abundance decreases for the solar corona with respect to the case of a Maxwellian distribution. Therefore, metal abundance measurements are a promising tool for testing the presence of high energy electron populations.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - atomic processes - radiation mechanisms: non-thermal

Status at CDS:  

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 968 2
2 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 292 0
3 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 711 3
4 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4187 2
5 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1097 1

    Equat.    Gal    SGal    Ecl

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2020.06.01-03:40:15

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