Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...256..487m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 256, no. 2, p. 487-494.
Astronomy and Astrophysics
Astrophysics
14
Binary Stars, Stellar Spectrophotometry, Light Curve, Stellar Color, Stellar Magnitude
Scientific paper
Differential BV photometry of DM UMa obtained on 77 nights during the six observing seasons over the years 1984-90 is presented. The phases of the light minima observed during 1988-90 are found to be nearly the same. The variation in B-V indicates that the star is redder at fainter visual magnitudes. We have analyzed all the B and V light curves of DM UMa available from 1979 onwards by means of a spot model which assumes that large discrete spots are responsible for the observed light variation; the method of least squares was employed to derive the best-fit spot parameters. Observationally, we find that from 1984 onwards the brightness at light curve maximum has increased monotonically whereas the amplitude of light variation has remained within a narrow range without any apparent trend; the modelling indicates a slow migration of the spots towards the equator and a gradual decrease of the spot area during the corresponding period. We derive a mean spot temperature of 3400 +/- 60 K from the data obtained during 10 of the observing seasons.
Mohin S.
Raveendran A. V.
No associations
LandOfFree
Photometric study of the RS CVn binary DM Ursa Majoris 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 study of the RS CVn binary DM Ursa Majoris, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric study of the RS CVn binary DM Ursa Majoris will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1214194