Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999injpb..73..931c&link_type=abstract
Indian J. Phys., Part B, Vol. 73B, No. 6, p. 931 - 944
Astronomy and Astrophysics
Astrophysics
1
Accretion: Black Holes, Accretion: Neutron Stars
Scientific paper
The study of the astrophysics of black holes and neutron stars has taken a new turn in the 1990s with the realization that sub-Keplerian flows and the associated centrifugal barrier near the horizon or the surface of a neutron star play a major role in deciding the nature of the emitted spectra and the formation of outflows from the accreting matter. This region may remain steady or oscillate depending on the accretion rate, specific angular momentum and specific energy of the flow. Intricacies of oscillation may depend on the degree of feedback the inflow receives from the outflow. This region may emit hard or soft X-rays depending on relative numbers of hot electrons and soft photons intercepted by this region. The author discusses how these properties come about and how they explain the observational results of black hole candidates.
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