Long-term starspot activity of short-period RS Canum Venaticorum stars. II. RT Andromedae

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/167968· OSTI ID:5126400

Zeilik, M; Cox, D A; De Blasi, C; Rhodes, M; Budding, E ^[1]

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1. New Mexico Univ., Albuquerque (USA) Carter Observatory, Wellington (New Zealand)

The photometric distortion waves in the light curves of the short-period RS CVn system RT And are parameterized by means of a dark, circular starspot model. The light curves are drawn from archival sources and 1987 and 1989 observations. The longitudes, latitudes, and areas of the active regions are inferred and the information content of the archival data is evaluated. It is concluded that one large starspot region on the primary star at high latitude and near quadrature longitudes can account for the major maculation effects since 1920. The temperature difference between the spotted region and the photosphere is 1100 to 1200 K. Good quality light curves result in an eccentricity (e = 0.026) and major axis orientation consistent with those reported by others using different procedures. 36 refs.

• OSTI ID: 5126400
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 345; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY STARS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
PHOTOMETRY
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
STARS
STARSPOTS
STELLAR ACTIVITY
TEMPERATURE GRADIENTS