UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae

Details UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jass...11...21n&link_type=abstract

Journal of Astronomy and Space Science, vol. 11, no. 1, p. XX-XX.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

VV Cep-type long period spectroscopic-eclipsing binary AZ Cas has been observed for five years, 1985 Oct - 1990 Feb, in UBV at the Ilsan Station of Yonsei University Observatory. A total of 431 observations (U=129, B=142 and V=160) are made for 86 nights. Instrumental differential UBV and B-V light curves made with these observations cover phases nearly a half of one period. There is no appreciable light variation in V but in other two passbands a gradual decrease of the brightness is clearly noticed. The loss of light in B resulted in a reddening in ¥Ä(B-V) by £«0.06 at phases between 0.4-0.5 as compared with that of at phase - 0.1. This intrinsic reddening arouses a question why at the orbital phase of the transit of a hot star in front of a cool M supergiant the heating of the facing hemisphere of M supergiant by the strong radiation from the B star is absent. With regard to this unusual situation we propose a hypothesis that a large amount of gas stream of low temperature ejected from the surface of M supergiant component towards the B star dominates the brightness of B star and reflection effect.

Affiliated with

Also associated with

No associations

Rating

UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UBV Photometry at the Outside Eclipse Phase of AZ Cassiopeiae will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1504657