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Polarimetry of magnetic catalysmic variables

Abstract

The design and construction of an astronomical polarimeter is described and an evaluation made of its performance. Extensive observations of cataclysmic variables with emphasis on the AM Her and DQ Her classes are then presented. The polarimeter permitted simultaneous linear and circular polarisation measurements, or, by rearranging the order of the retarders in the beam, linear polarisation measurements alone, or circular polarisation measurements alone, with enhanced efficiency. Extensive sets of observations using the polarimeter were obtained for six of the ten AM Her variables. A comparison was made between the competing models for the cyclotron emission, showing that those which take into account the temperature structure of the accretion region provide the best results.
Authors:
Publication Date:
Jan 01, 1985
Product Type:
Book
Reference Number:
AIX-16-079307; EDB-86-005914
Resource Relation:
Other Information: Thesis (Ph.D.)
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ERUPTIVE VARIABLE STARS; POLARIZATION; POLARIMETERS; DESIGN; PERFORMANCE; CYCLOTRON RADIATION; DATA COMPILATION; MAGNETIC FIELDS; X RADIATION; BREMSSTRAHLUNG; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; IONIZING RADIATIONS; NUMERICAL DATA; RADIATIONS; STARS; VARIABLE STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
6239129
Research Organizations:
Cape Town Univ. (South Africa)
Country of Origin:
South Africa
Language:
English
Availability:
Registrar, University of Cape Town, University Private Bag, Rondebosch, 7700, South Africa.
Submitting Site:
INIS
Size:
Pages: 196
Announcement Date:
May 13, 2001

Citation Formats

Cropper, M. Polarimetry of magnetic catalysmic variables. South Africa: N. p., 1985. Web.
Cropper, M. Polarimetry of magnetic catalysmic variables. South Africa.
Cropper, M. 1985. "Polarimetry of magnetic catalysmic variables." South Africa.
@misc{etde_6239129,
title = {Polarimetry of magnetic catalysmic variables}
author = {Cropper, M}
abstractNote = {The design and construction of an astronomical polarimeter is described and an evaluation made of its performance. Extensive observations of cataclysmic variables with emphasis on the AM Her and DQ Her classes are then presented. The polarimeter permitted simultaneous linear and circular polarisation measurements, or, by rearranging the order of the retarders in the beam, linear polarisation measurements alone, or circular polarisation measurements alone, with enhanced efficiency. Extensive sets of observations using the polarimeter were obtained for six of the ten AM Her variables. A comparison was made between the competing models for the cyclotron emission, showing that those which take into account the temperature structure of the accretion region provide the best results.}
place = {South Africa}
year = {1985}
month = {Jan}
}