X-ray luminosities of early-type galaxies : J/MNRAS/328/461


Authors : O'Sullivan E. orcid , Forbes D.A., Ponman T.J. (hide) , Forbes D.A., Ponman T.J. et..al

Bibcode : 2001MNRAS.328..461O (ADS) (Simbad) (Objects) (hide)

CDS Keywords : X-ray sources; Galaxy catalogs
UAT : X-ray sources, Galaxies, Catalogs

Observation (OC)

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Inserted into VizieR : 10-Mar-2006
Last modification : 27-Jun-2024

A catalogue and analysis of X-ray luminosities of early-type galaxies. (2001)

Keywords : catalogues - surveys - galaxies elliptical and lenticular, cD - X-rays: galaxies

Abstract:We present a catalogue of X-ray luminosities for 401 early-type galaxies, of which 136 are based on newly analysed ROSAT PSPC pointed observations (Cat. <IX/30>). The remaining luminosities are taken from the literature and converted to a common energy band, spectral model and distance scale. Using this sample we fit the L_X_/L_B_ relation for early-type galaxies and find a best-fit slope for the catalogue of ~2.2. We demonstrate the influence of group-dominant galaxies on the fit and present evidence that the relation is not well modelled by a single power-law fit. We also derive estimates of the contribution to galaxy X-ray luminosities from discrete-sources and conclude that they provide L_(discrete-source-contribution)_/L_B_~29.5erg/s/L_B{sun}_. We ...(more)
Abstract: (hide)

  • IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000)
  • J/ApJS/80/531 : An X-ray catalog and atlas of galaxies (Fabbiano+, 1992)

                
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