An orbital solution for the binary Cepheid AW Per

Details An orbital solution for the binary Cepheid AW Per An orbital solution for the binary Cepheid AW Per

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260..273v&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 2, p. 273-279.

Astronomy and Astrophysics

Astronomy

6

Binary Stars, Orbital Elements, Stellar Mass, Stellar Spectrophotometry, Companion Stars, Least Squares Method

Scientific paper

New photoelectric measurements and orbital elements of the spectroscopic binary system AW Per are presented, based on the simultaneous solution of the period variation and gamma-velocity data series of the classical Cepheid. The orbital elements are in good agreement with the results derived by Welch and Evans (1989). The mass function of this binary system is close to 1.2 solar mass. The physical properties of the pulsating component are derived using the surface-brightness method. The computed mass of the Cepheid star is 6 solar masses, while the lowest value of the mass of the companion is about 5 solar masses. This confirms the mass problem of the late B-type companion reported by Welch and Evans.

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