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

Abstract

view Abstract Citations (56) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Long-Term Starspot Activity of Short-Period RS Canum Venaticorum Stars. II. RT Andromedae Zeilik, M. ; Cox, D. A. ; de Blasi, C. ; Rhodes, M. ; Budding, E. Abstract 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. Publication: The Astrophysical Journal Pub Date: October 1989 DOI: 10.1086/167968 Bibcode: 1989ApJ...345..991Z Keywords: Andromeda Constellation; Astronomical Photometry; Binary Stars; Light Curve; Starspots; Emission Spectra; Line Spectra; Radio Emission; Stellar Spectra; Astrophysics; STARS: BINARIES; STARS: INDIVIDUAL CONSTELLATION NAME: RT ANDROMEDAE full text sources ADS | data products SIMBAD (1) Related Materials (4) Part 1: 1986BAAS...18..955Z Part 3: 1990ApJ...354..352Z Part 4: 1990ApJ...363..647Z Part 5: 1994ApJ...421..303Z