Other
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phdt........18r&link_type=abstract
Thesis (PH.D.)--THE UNIVERSITY OF TEXAS AT AUSTIN, 1994.Source: Dissertation Abstracts International, Volume: 56-02, Section: B,
Other
Scientific paper
I have performed three projects aimed at better understanding the late-type dwarf star in cataclysmic variables, and using its properties to understand the system as a whole. First, I have completed a near-infrared spectroscopic survey of cataclysmic variables. Emission lines of H I and He I are present in most objects, and absorption features typical of late-type stars were detected in some systems. Spectra of SS Cyg over several years show possible variability of the absorption line strengths. Two systems may show emission lines from high-ionization species. Second, I have revised the infrared surface brightness technique for determining the distance to cataclysmic variables. With a new, larger dataset I find that the behavior of the surface brightness as a function of temperature is substantially different from that seen in previous work. I also find that the behavior of the surface brightness depends on luminosity class, although not on stellar population or the level of chromospheric activity. Third, I have used high-resolution optical spectra of a pre-cataclysmic variable to map and follow the evolution of cool starspots on the surface of the late-type star. These maps show a high -latitude spot, similar to that seen in other magnetically -active systems. A spot also appears consistently at the sub-companion longitude. The radius of the late-type star is derived using its rotational velocity, and the star appears to be oversized for its spectral type.
No associations
LandOfFree
The Late-Type Dwarf Star in Cataclysmic Variables. 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 The Late-Type Dwarf Star in Cataclysmic Variables., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Late-Type Dwarf Star in Cataclysmic Variables. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1685037