Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139...25s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 1, Oct. 1984, p. 25-29.
Astronomy and Astrophysics
Astrophysics
13
Andromeda Constellation, Astronomical Photometry, Binary Stars, Light Curve, Starspots, Variable Stars, Electrophotometry, Fourier Analysis, Stellar Activity, Stellar Motions
Scientific paper
The authors present V-band photometry of the long-period RS CVn-type binary λ Andromedae (P(phot.) = 53.952 days) carried out in the observing seasons 1981 - 82 and 1982 - 83. They covered one complete cycle in 1981 - 82 and more than three contiguous cycles in 1982 - 83. Maximum amplitudes (full range) are about 0m.22 and 0m.19, respectively. An analysis of the existing epochs of maximum and minimum light confirms the photometric period given by Boyd et al. (1983) but discloses the existence of a quasi-periodic trend in the (O-C) curve suggesting cyclic changes on a time scale of about 9 years. The fourier analysis of the 1982 - 83 record shows a certain spread in frequency around the fundamental periodicity; this can be interpreted as due to the presence of dark spots highly spread in latitude, moving at different velocities owing to the differential rotation of the star.
Brettman O. H.
Busso Maurizio
Cellino Alberto
Fried Ralph E.
Hall David S.
No associations
LandOfFree
Photometric changes and SPOT motion in Lambda Andromedae 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 Photometric changes and SPOT motion in Lambda Andromedae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric changes and SPOT motion in Lambda Andromedae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1226201