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The new magnetic white dwarf PG 1031 + 234 - Polarization and field structure at more than 500 milion GaussThe discovery and study of a PG white dwarf which shows strong linear and circular polarization modulated with a rotation period of 3 hr 24 min is reported. The new star, PG 1031 + 234, is more highly magnetic than even Grw +70 deg 8247, with absorption components of hydrogen in its optical and UV spectra corresponding to fields from 200 to more than 500 MG. An asymmetric dependence of polarization on rotational phase shows that the surface field structure on the star is more complex than a simple centered dipole. The basic observational features can be well reproduced by a rotating star containing an oblique centered dipole punctuated near its magnetic equator by a high-field spot containing primarily radial field lines.
Document ID
19870033174
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schmidt, Gary D.
(Arizona Univ. Tucson, AZ, United States)
West, Steven C.
(Arizona Univ. Tucson, AZ, United States)
Liebert, James
(Steward Observatory Tucson, AZ, United States)
Green, Richard F.
(Kitt Peak National Observatory Tucson, AZ, United States)
Stockman, H. S.
(Space Telescope Science Institute Baltimore, MD, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 309
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A20448
Funding Number(s)
CONTRACT_GRANT: NSF AST-84-08740
CONTRACT_GRANT: NSF AST-82-18624
CONTRACT_GRANT: NSF AST-82-10513
CONTRACT_GRANT: NAG5-545
Distribution Limits
Public
Copyright
Other

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