Место издания:Astron. Soc. “Rudjer Bošković” Sofia
Первая страница:67
Последняя страница:74
Аннотация:We present results of searching for variable stars in the field of β Cassiopeiae on
digitized photographic plates of the Sternberg Astronomical Institute’s plate stacks. The
negative astronomical plates of 30 x 30 cm size (that corresponds to 10° x 10° field of
view) were obtained with the 40 cm astrograph in 1940–90s. We have discovered and
investigated 1011 new variable stars and found 263 previously known variable stars. New
variables include 682 eclipsing binaries of different subtypes, 5 BY Draconis stars, 5
classical Cepheids and 4 Cepheids of the Galaxy’s spherical component, 3 δ Scuti stars, 15
high-amplitude δ Scuti stars (HADS), 33 RR Lyrae stars, 1 RS CVn star, 44 semi-regular
red variables, 207 irregular variables (65 yellow or white stars and 142 red stars of LB
type), and 12 variable stars that need confirmation and more careful study with CCD.
Some of discovered stars initially were marked as suspected, for now more than 20 of
them have accurate elements derived from our CCD-photometry. We considered only
about 400 plates of interest from the 22500 pieces collection. So the amount of the
variables “hidden” in the Sternberg Astronomical Institute’s plate stacks is enormous.