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Title: Aberration and advection effects in expanding spherically symmetric shells
Authors: Peraiah, A
Keywords: Advection;Optical thickness;Radiative transfer;Stellar envelopes;Supernovae;Aberration;Coherent scattering;Computational astrophysics;Spherical shells
Issue Date: Apr-1991
Publisher: American Astronomical Society
Citation: Astrophysical Journal, Part 1 , Vol. 371, No.2, pp. 673 - 683
Abstract: The extreme outer layers of supernovae, novae, AGN, QSOs, and many supergiant stars are known to be in rapid expansion or contraction. In this paper, aberration and advection effects in a spherical medium scattering radiation isotropically and coherently are investigated. The shells are assumed to be moving radially with velocities of 1000, 2000, 3000, 4000, and 5000 km/s. A solution of the radiative transfer equation is presented. The changes in mean intensities are dependent on the geometrical and optical thickness and in particular depend on the ratio T/(B/A), where T is the maximum optical depth and B and A are the outer and inner radii of the spherical shell, respectively.
ISSN: 0004-637X
Appears in Collections:IIAP Publications

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