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Millisecond optical photometry of the DQ Herculis objectsThe results of millisecond optical photometry of the DQ Herculis stars EX Hya, H2252-035, V1223 Sgr, and AE Aqr obtained at the Las Campanas Observatory and Cerro Tololo Inter-American Observatory during the years 1985, 1986, and 1987 are reported. The data for coherent and incoherent features are searched for. Coherent features (other than those previously known) were not detected for frequencies between 0.1 and 250 Hz at 4-sigma upper limits of 0.05-0.4 percent. Evidence is not found for 1-3 s, quasi-coherent features. Such features have been detected in the optical emission of the AM Her objects AN UMa, EF Eri, and E1405-451. Because of the similarities between AM Her and DQ Her objects, it was suggested that such quasi-coherent features might also be found in the DQ Her objects.
Document ID
19890024100
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Imamura, James N.
(Oregon, University Eugene; Los Alamos National Laboratory, NM, United States)
Steiman-Cameron, Thomas Y.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1988
Publication Information
Publication: Astronomical Journal
Volume: 96
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
89A11471
Funding Number(s)
CONTRACT_GRANT: NSF AST-86-11788
CONTRACT_GRANT: NSF AST-83-51997
Distribution Limits
Public
Copyright
Other

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