Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..215w&link_type=abstract
Astrophysical Journal, Part 1, vol. 246, May 15, 1981, p. 215-222.
Astronomy and Astrophysics
Astrophysics
63
Companion Stars, Dwarf Novae, Eclipsing Binary Stars, Novae, Radial Velocity, Cross Correlation, Emission Spectra, Error Analysis, Sodium, Stellar Spectra
Scientific paper
U Geminorum is one of the brighter dwarf novae and an eclipsing binary system. It is pointed out that, in connection with these characteristics, U Gem has proven crucial to an understanding of the structure of cataclysmic variable stars. The considered investigation is concerned with the determination of the radial velocity semiamplitude of U Gem B, the secondary star in the U Gem system. The determination is based on observations of the near-infrared Na I absorption doublet. Spectroscopic conjunction occurs 0.026 + or - 0.007 periods before mid-eclipse of the bright spot. The result that U Gem B seems to be larger than a zero age main-sequence star of the same mass casts some doubt on those studies of cataclysmic variables, where the component masses have been determined under the assumption that the secondary star obeys some particular mass-radius relation.
No associations
LandOfFree
Radial velocity observations of the secondary star in U Geminorum 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 Radial velocity observations of the secondary star in U Geminorum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radial velocity observations of the secondary star in U Geminorum will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1441090