TY - JOUR
T1 - Cyclotron harmonics in accreting pulsars and gamma-ray bursters
T2 - Effect of two-photon processes
AU - Alexander, S. G.
AU - Mészáros, P.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1991/5/10
Y1 - 1991/5/10
N2 - We discuss the radiative transfer at the cyclotron first, second, and third harmonics for simplified accreting pulsar and gamma-ray burster emission regions. We include two-photon scattering as well as two-photon emission, which play a major role in determining the line-strength ratio. Stimulated effects are also important for accurately modeling the optically thick line and continuum regions. These calculations are compared with recent observations of accreting pulsars and gamma-ray burst sources, showing a qualitative agreement. We find that the cyclotron harmonic lines should be strongly polarized.
AB - We discuss the radiative transfer at the cyclotron first, second, and third harmonics for simplified accreting pulsar and gamma-ray burster emission regions. We include two-photon scattering as well as two-photon emission, which play a major role in determining the line-strength ratio. Stimulated effects are also important for accurately modeling the optically thick line and continuum regions. These calculations are compared with recent observations of accreting pulsars and gamma-ray burst sources, showing a qualitative agreement. We find that the cyclotron harmonic lines should be strongly polarized.
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U2 - 10.1086/170001
DO - 10.1086/170001
M3 - Article
AN - SCOPUS:0001592182
SN - 0004-637X
VL - 372
SP - 565
EP - 572
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -