On the X-ray emission of the low-mass galaxy groups

Abstract

It is shown that the low-mass groups obey the $L_x\sim {\sigma }_v^4$ law deduced for galaxy clusters. The impression of the more shallow slope of the $L_x-{\sigma }_v$ correlation for groups is created not by enhanced X-ray emission, but by underestimation of the radial velocity dispersion of some groups.

4 pages, 2 figures, accepted in ApJL

References in corpus (1)

• The LX-sigma Relation for Galaxies and Clusters of Galaxies

Cited by in corpus (6)

• X-ray Scaling Properties of Early-type Galaxies
• X-Ray Scaling Relations of Galaxy Groups in a Hydrodynamic Cosmological Simulation
• A Catalog of Compact Groups of Galaxies in the SDSS Commissioning Data
• The Shape of Poor Groups of Galaxies
• Chandra Observations of low velocity dispersion groups
• On the Xray Luminosity - velocity dispersion relation of groups of galaxies