Broad Red‐Shifted Lines as a Signature of Outflow
作者:
Demosthenes Kazanas,
Lev Titarchuk,
Peter A. Becker,
期刊:
AIP Conference Proceedings
(AIP Available online 1904)
卷期:
Volume 714,
issue 1
页码: 154-156
ISSN:0094-243X
年代: 1904
DOI:10.1063/1.1781018
出版商: AIP
数据来源: AIP
摘要:
We formulate and solve the diffusion problem of line photon propagation in a bulk outflow from a compact object (black hole or neutron star) using a generic assumption regarding the distribution of line photons within the outflow. Thomson scattering of the line photons within the expanding flow leads to a decrease of their energy which is of first order inv/c, wherevis the outflow velocity andcthe speed of light. We demonstrate that the emergent line profile is closely related to the time distribution of photons diffusing through the flow (the light curve) and consists of a broad redshifted feature. We analyzed the line profiles for the general case of outflow density distribution. We emphasize that the redshifted lines are intrinsic properties of the powerful outflow that are supposed to be in many compact objects. © 2004 American Institute of Physics
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