The LX-sigma Relation for Galaxies and Clusters of Galaxies
Preprint
- 18 May 2001
Abstract
We demonstrate that individual elliptical galaxies and clusters of galaxies form a continuous X-ray luminosity---velocity dispersion (LX-sigma) relation. Our samples of 280 clusters and 57 galaxies have LX ~ sigma^4.4 and LX ~ sigma^10, respectively. This unified LX - sigma relation spans 8 orders of magnitude in LX and is fully consistent with the observed and theoretical luminosity---temperature scaling laws. Our results support the notion that galaxies and clusters of galaxies are the luminous tracers of similar dark matter halos.Keywords
All Related Versions
- Version 1, 2001-05-18, ArXiv
- Published version: The Astrophysical Journal, 554 (2), L129.
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