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27 April 2024 |
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The X-ray Properties of Moderate-redshift Galaxy Groups Selected by Association with Gravitational Lenses | | C. D. Fassnacht
; D. D. Kocevski
; M. W. Auger
; L. M. Lubin
; J. L. Neureuther
; T. E. Jeltema
; J. S. Mulchaey
; J. P. McKean
; | | Date: |
13 Nov 2007 | | Abstract: | We present results from a systematic investigation of the X-ray properties of
a sample of moderate redshift (0.3<z<0.6) galaxy groups. These groups were
selected not by traditional X-ray or optical search methods, but rather by an
association, either physical or along the line of sight, with a strong
gravitational lens. We calculate the properties of seven galaxy groups in the
fields of six lens systems. Diffuse X-ray emission from the intragroup medium
is detected in four of the groups. All of the detected groups have X-ray
luminosities greater than 10^{42} h^{-2} erg/s, and lie on the L_X-sigma_v
relations defined by local groups and clusters. The upper limits for the
non-detections are also consistent with the local L_X-sigma_v relationships.
Although the sample size is small and deeper optical and X-ray data are needed,
these results suggest that lens-selected groups are similar to X-ray selected
samples and, thus, are more massive than the typical poor-group environments of
local galaxies. | | Source: | arXiv, 0711.2066 | | Services: | Forum | Review | PDF | Favorites | |
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