The binary companion of the classical Cepheid AW Per

Details The binary companion of the classical Cepheid AW Per The binary companion of the classical Cepheid AW Per

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97.1737e&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 97, June 1989, p. 1737-1751. Research supported by NSERC.

Astronomy and Astrophysics

Astronomy

9

B Stars, Binary Stars, Cepheid Variables, Triple Stars, Iue, Main Sequence Stars, Stellar Luminosity, Stellar Mass, Stellar Temperature

Scientific paper

An analysis of IUE spectra of the companion of AW Per shows it to be an extreme BpSi/HeW star with a spectral type of B7 V to B8 V. The flux of the composite spectrum from 1200 A through V is found to be well matched by F7 Ib and B8 V standard stars with Delta M(V) = 3.1 mag. The results suggest that the mass of the Cepheid must be greater than 4.7 solar masses. The flux distribution of the star and the mass limits from the orbit are consistent with a companion that is itself a binary.

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