The [ITAL]L[/ITAL][TINF]X[/TINF]-σ Relation for Galaxies and Clusters of Galaxies

2001/05/18 by Andisheh Mahdavi, Margaret J. Geller · 7 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Galaxies: Formation, Evolution, Phenomena #astro-ph

paper · pdf · doi:10.1086/321710

published as Astrophys.J. 554 (2001) L129 · 11 pages, including 2 tables and 2 figures. Accepted for publication in The Astrophysical Journal Letters; the Letters version excludes Table 1, which is available in ASCII format at http://tdc-www.harvard.edu/lxsigma

arxiv created 2001/05/18 · openalex publication_date 2001/06/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

We demonstrate that individual elliptical galaxies and clusters of galaxies form a continuous X-ray luminosity-velocity dispersion ( L X -σ) relation. Our samples of 280 clusters and 57 galaxies have L X ∝ σ 4.4 and L X ∝ σ 10 , respectively. This unified L X -σ relation spans 8 orders of magnitude in L X 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.

Citations

• The Evolution of X‐Ray Clusters in a Low‐Density Universe
• The Mass Profile of the Coma Galaxy Cluster

Cited by

• Detection of X‐Rays from Galaxy Groups Associated with the Gravitationally Lensed Systems PG 1115+080 and B1422+231
• Environment and Galaxy Evolution at Intermediate Redshift in the CNOC2 Survey
• The anatomy of the NGC 5044 group - I. Group membership and dynamics
• Scaling relations in fossil galaxy groups
• Clusters of Galaxies in the Local Universe
• The X-ray luminosity-velocity dispersion relation in the REFLEX cluster survey
• AC 114: A Cluster with a Soft X‐Ray Tail