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Pioneer 10 observations of the Beta Cephei stars Gamma Pegasi and Delta CetiThe results of analyzing broad-band Pioneer 10 photometric observations of the low-amplitude pulsating Beta Cephei stars Gamma Pegasi and Delta Ceti are reported. Periods and light curve amplitudes of 3.649 + or - 0.020 hr, 0.05 + or - 0.02 mag for Gamma Peg and 3.869 + or - 0.020 hr, 0.13 + or - 0.02 mag for Delta Ceti are obtained; a power spectrum analysis of the data reveals no other periods. No evidence is found for a phase shift between the light curve maxima in the UV and visible regions. The observed amplitudes combined with published visual and near-UV data suggest a flux and temperature variability of about 200 solar luminosities and 250 K for Gamma Peg and about 600 solar luminosities and 450 K for Delta Cet. These results are compared with others obtained with satellite and ground-based instrumentation.
Document ID
19870047698
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Peters, Geraldine J.
(University of Southern California Los Angeles, CA, United States)
Ogawa, H. S.
(University of Southern California Los Angeles, CA, United States)
Judge, K. S.
(University of Southern California Los Angeles, CA, United States)
Judge, D. L.
(Southern California, University Los Angeles, CA, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 314
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A34972
Funding Number(s)
CONTRACT_GRANT: NAG2-146
Distribution Limits
Public
Copyright
Other

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