Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-01-07
Astronomy and Astrophysics
Astrophysics
43 pages, 15 figures; to appear in 'Compact Stellar X-Ray Sources', eds. W.H.G. Lewin and M. van der Klis, Cambridge Universit
Scientific paper
Compact binaries have long been a paradigm for accretion theory. Much of our present view of how accretion occurs comes directly from the comparison of theory with observations of these sources. Since theory differs little for other objects such as active galaxies, increasing efforts have recently gone into searching for correspondences in observed behaviour. This chapter aims at giving a concise summary of the field, with particular emphasis on new developments since the previous edition of this book. These developments have been significant. Much of the earlier literature implicitly assumed that accreting binaries were fairly steady sources accreting most of the mass entering their vicinity, often with main-sequence companions, and radiating the resulting accretion luminosity in rough isotropy. We shall see that in reality these assumptions fail for the majority of systems. Most are transient; mass ejection in winds and jets is extremely common; a large (sometimes dominant) fraction of even short-period systems have evolved companions whose structure deviates significantly from the zero-age main sequence; and the radiation pattern of many objects is significantly anisotropic. It is now possible to give a complete characterization of the observed incidence of transient and persistent sources in terms of the disc instability model and formation constraints. X-ray populations in external galaxies, particularly the ultraluminous sources, are revealing important new insights into accretion processes and compact binary evolution.
No associations
LandOfFree
Accretion in Compact Binaries 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 Accretion in Compact Binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Accretion in Compact Binaries will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-722387