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Record 49 of 13333
The luminosity of the double-mode Cepheid Y Carinae
External Online Source: doi:10.1086/170974
Author and Affiliation:
Evans, Nancy R.(York University, North York, Canada)
Abstract: IUE spectra of the double-mode Cepheid Y Carinae have been used to determine the spectral type of the binary companion. From the companion spectral type (B9.O V), the absolute magnitude of the Cepheid is found to be -2.94 mag, with an estimated uncertainty of +/-0.3. This luminosity is in good agreement with that from the period-luminosity-color relation of Feast and Walker for the fundamental mode. This agreement, together with the large magnitude difference between the B9.0 V star and the Cepheid, confirm that the Cepheid is a normal classical Cepheid with a mass much larger than that inferred from the ratio of the two periods (beat mass). The two double-mode Cepheids with independently determined luminosities (Y Car and V 367 Sct) both fall on the blue edge of the instability strip.
Publication Date: Feb 01, 1992
Document ID:
19920039749
(Acquired Nov 22, 1995)
Accession Number: 92A22373
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 385; 680-684
Publisher Information: United States
Contract/Grant/Task Num: NAS5-28749
Financial Sponsor: NASA; United States
Organization Source: York Univ. Ontario; Silver Spring, MD, United States
Computer Sciences Corp.
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CEPHEID VARIABLES; COMPANION STARS; STELLAR LUMINOSITY; STELLAR OSCILLATIONS; STELLAR SPECTRA; ULTRAVIOLET ASTRONOMY; HERTZSPRUNG-RUSSELL DIAGRAM; IUE
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 385, Feb. 1, 1992, p. 680-684. Research supported by NSERC.
Miscellaneous Notes: Research supported by NSERC
Availability Source: Other Sources
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