The L_x-sigma Relation For Poor Groups of Galaxies

Details The L_x-sigma Relation For Poor Groups of Galaxies The L_x-sigma Relation For Poor Groups of Galaxies

2001-10-01

arxiv.org/abs/astro-ph/0110046v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure. Contribution to "Tracing Cosmic Evolution with Galaxy Clusters" (Sesto2001), ASP Conference Series

Scientific paper

We use a sample of 20 poor groups of galaxies to study the low L_x tail of the L_x-sigma relationship. We have obtained redshifts for fainter members and deep X-ray imaging of these groups. We find that the L_x-sigma relationship derived for the rich clusters in the sample of Mushotzky & Scharf (1997) is consistent with the data for our 20 poor groups. However, it is not possible to reach strong conclusions about differences in the L_x-sigma relationship for groups and clusters in general at the present time because of significant differences between various cluster samples.

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