SIMBAD references

2010ApJ...721.1523K - Astrophys. J., 721, 1523-1530 (2010/October-1)

X-ray properties of young early-type galaxies. I. X-ray luminosity function of low-mass X-ray binaries.


Abstract (from CDS):

We have compared the combined X-ray luminosity function (XLF) of low-mass X-ray binaries (LMXBs) detected in Chandra observations of young, post-merger elliptical galaxies with that of typical old elliptical galaxies. We find that the XLF of the "young" sample does not present the prominent high-luminosity break at LX> 5x1038 erg/s found in the old elliptical galaxy XLF. The "young" and "old" XLFs differ with a 3σ statistical significance (with a probability less than 0.2% that they derive from the same underlying parent distribution). Young elliptical galaxies host a larger fraction of luminous LMXBs (LX> 5x1038 erg/s) than old elliptical galaxies and the XLF of the young galaxy sample is intermediate between that of typical old elliptical galaxies and that of star-forming galaxies. This observational evidence may be related to the last major/minor mergers and the associated star formation.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - X-rays: binaries - X-rays: galaxies

Simbad objects: 17

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2010ApJ...721.1523K and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact