Three-colour photographic photometry of the variable star BD+28°637 / ცვალებადი ვარსკვლავის BD+28°637 სამფეროვანი ფოტოგრაფიული ფოტომეტრია

Mosidze, L.N. and მოსიძე, ლ. and Мосидзе, Л.Н. (1970) Three-colour photographic photometry of the variable star BD+28°637 / ცვალებადი ვარსკვლავის BD+28°637 სამფეროვანი ფოტოგრაფიული ფოტომეტრია. აბასთუმნის ასტროფიზიკური ობსერვატორიის ბიულეტენი / Bulletin of the Abastumani Astrophysical Observatory (39). pp. 21-28.

Preview

Text 1970-39–3.pdf Download (3MB) | Preview

Abstract

On the basis of three-colour photographic observational data obtained in 1960-64 the emission star BD+28°637 has been estimated to be a variable of the RW Aur type. The light curves in three colours have been drawn. The colour index variations indicate some ultraviolet excess of radiation to be present. The diagrams (U,V), (V,B), (U-B,U), (B-V, U), (U-B,V) and (B-V,V) have been drawn. On the Hertzsprung-Russell diagram the star is situated inside the T-band, on the two-colour diagram all the individual observations bring the star to the main sequence line; although some of them noticeably depart from it on both sides. The diagram demonstrates some increases of ultraviolet excess while brightening of the star.

Item Type:	Article
Subjects:	Q Science > QB Astronomy
Divisions:	Institutes > Evgeny Kharadze Abastumani National Astrophysical Observatory
Depositing User:	თამარ ჭაღიაშვილი
Date Deposited:	25 Jul 2018 09:36
Last Modified:	25 Jul 2018 09:36
URI:	http://eprints.iliauni.edu.ge/id/eprint/8397

Actions (login required)

View Item