Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-11-05
Mon.Not.Roy.Astron.Soc. 348 (2004) 325
Astronomy and Astrophysics
Astrophysics
9 pages, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07371.x
We present an estimate of the bolometric X-ray luminosity - velocity dispersion L_x - sigma_v relation measured from a new, large and homogeneous sample of 171 low redshift, X-ray selected galaxy clusters. The linear fitting of log(L_x) - log(sigma_v) gives L_x = 10^{32.72 \pm 0.08} sigma^{4.1 \pm 0.3}_v erg s^{-1} h^{-2}_{50}. Furthermore, a study of 54 clusters, for which the X-ray temperature of the intracluster medium T is available, allows us to explore two other scaling relations, L_x -T and sigma_v -T. From this sample we obtain L_x \propto T^{3.1 \pm 0.2} and sigma_v \propto T^{1.00 \pm 0.16}, which are fully consistent with the above result for the L_x-sigma_v. The slopes of L_x -T and sigma_v -T are incompatible with the values predicted by self-similarity (L_x \propto T^{2} \propto \sigma_v^4), thus suggesting the presence of non-gravitational energy sources heating up the intracluster medium, in addition to the gravitational collapse, in the early stages of cluster formation. On the other hand, the result on log(L_x) - log(sigma_v) supports the self-similar model.
Boehringer Hans
Collins Charles Aloysius
Guzzo Luigi
Ortiz-Gil Amelia
Schuecker Peter
No associations
LandOfFree
The X-ray Luminosity - Velocity Dispersion relation in the REFLEX Cluster Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The X-ray Luminosity - Velocity Dispersion relation in the REFLEX Cluster Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The X-ray Luminosity - Velocity Dispersion relation in the REFLEX Cluster Survey will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-627668