Radial-velocity and light variations of IR Cephei

Abstract

view Abstract Citations (1) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Radial-Velocity and Light Variations of IR Cephei Marschall, Laurence A. ; Seeds, Michael A. ; Davis, Robert J. Abstract Radial-velocity observations of the short-period Cepheid, IR Cephei, have been used to derive a complete radial-velocity versus phase curve for the variable, to investigate the presence of a possible binary companion, and to address the question of its membership in the Cepheus OB2 association. The observations are consistent with the absence of a close binary companion and shed doubt on its membership in the association. Photoelectric observations made with the Phoenix 10 Automated Photometric Telescope confirm the single nature of the star. We present simulations to show the effects of an equiluminous companion on the light curve of a Cepheid, concluding that the light curve of IR Cephei, whether or not it is corrected for a possible companion, exhibits the low-amplitude, sinusoidal variations characteristic of an s-type Cepheid. Publication: The Astronomical Journal Pub Date: September 1993 DOI: 10.1086/116711 Bibcode: 1993AJ....106.1123M Keywords: Binary Stars; Cepheid Variables; Radial Velocity; B Stars; Light Curve; O Stars; Stellar Spectrophotometry; Astrophysics; CEPHEIDS; BINARIES: VISUAL; STARS: INDIVIDUAL: IR CEPHEI full text sources ADS | data products SIMBAD (4)