Statistics – Computation
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1149h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 107, no. 3, p. 1149-1164
Statistics
Computation
28
Eclipses, Eclipsing Binary Stars, Electromagnetic Absorption, Evolution (Development), Frequencies, H Alpha Line, Light Emission, Luminosity, Prominences, Stellar Models, Stellar Spectra, Computation, Computational Grids, Numerical Analysis, Parameterization
Scientific paper
We have surveyed ten RS CVn binary systems and have detected large regions of extended, prominencelike material which we have shown to be a common feature in these systems. These extended regions are apparent as anomalous absorption features in the spectra when they obscure the disk of the eclipsed star and as weak emission features when they appear with no disk behind. We have constructed a first-generation model to verify the general prominencelike nature of the material and to estimate its extent and its most basic physical characteristics. In this paper we present our results of our modeling on four of the systems in our survey that showed clear signatures of extended material: AW Her, MM Her, SS Boo, and UV Psc. We find that these stellar prominencelike structures are very much larger than their solar counterparts, though their gross physical characteristics (i.e., their electron density and temperature and their general appearance as tenuous, vertically oriented, magnetically confined structures) are similar to those seen in solar prominences. These features appear to evolve fairly rapidly, since moderate- to high-velocity flows ranging from several tens of km/s to 170 km/s are apparent. However, in at least one case (SS Boo) they are recurrent over a time scale of at least a year. We conclude by discussing the implications of this work regarding the nature of close binary star active structures and their evolution.
Hall Jeffrey Clifton
Ramsey Lawrence W.
No associations
LandOfFree
Eclipse observations of RS CVn binaries. 2: A parametric model of extended matter 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 Eclipse observations of RS CVn binaries. 2: A parametric model of extended matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eclipse observations of RS CVn binaries. 2: A parametric model of extended matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1870290