Year: 2001
Type: article
Abstract: Spectroscopic observations in the range 6500-6700 Å and BVRI photometry of the eclipsing short-period RS CVn-star RT And are presented. We determined km s-1 and km s-1 by measurement of the double profiles of the lines Hα and FeI 6678, and obtained the mass ratio and masses of the star components and . It was established that the emission activity of RT And is associated with its secondary component. The relative contribution of the secondary star is stronger in the FeI 6678 line than in Hα. A strong emission feature between the two profiles of FeI 6678 at phase 0.73 was detected that is probably due to the appearance of extended emitting structure. The multicolor light curve of RT And is fitted by two cool spots on the primary star with equal sizes 21° and temperatures 4980 K and located at middle latitudes and longitudes symmetrical to the line connecting the star centers. Both spectral and photometric data lead to the conclusion that the secondary star of RT And is oversized for its mass.
Source: Astronomy and Astrophysics
Authors: D. P. Kjurkchieva, D. V. Marchev, W. Ogloza
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2018390519