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Super-Eddington Sources in Galaxies

Published online by Cambridge University Press:  25 May 2016

G. Fabbiano
G. Fabbiano*
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden St., Cambridge MA, 02138, USA

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Imaging X-ray observations have resolved X-ray sources in many nearby ‘normal’ galaxies. These sources are associated with different galaxian component, including: bulge and globular clusters(LMXB, e.g. in M31); the disk/arm component (LMXB, HMXB, SNR, SN, ISM shells); and low-luminosity AGN (see reviews in Fabbiano 1989; 1995; 1996). A number of these sources have X-ray luminosities in excess of the Eddington luminosity for 1 M⊙ accreting object (~ 1.3 × 1038ergs s−1), and have been called Super-Eddington sources. Nearly 100 Super-Eddington sources have been reported so far, based on Einstein and ROSAT images (see Fabbiano 1989; 1995; 1996; Makishima 1994). The number of these sources increases with the maximum distance of the galaxy sample considered (e.g. Read et al 97). This is in part due to confusion, but it is also true that considering the larger sample of galaxies one obtains in a larger volume of space the amount of these relatively rare sources would increase as well.

Type
Session 3: Diagnostics of High Gravity Objects with X- and Gamma Rays
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 93 - 96
Copyright
Copyright © Kluwer 1998 

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