V792 Her=HD 155638: A totally eclipsing RS CVn binary |
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| Authors: | Charles H Nelson Douglas S Hall Francis C Fekel Robert E Fried Richard E Lines Helen C Lines |
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| Institution: | (1) Dyer Observatory, Vanderbilt University, Nashville, Tennessee, USA;(2) Dyer Observatory, Vanderbilt University, Nashville, Tennessee, USA;(3) Braeside Observatory, Flagstaff, Arizona, USA;(4) Lines Observatory, Phoenix, Arizona, USA;(5) Present address: Astronomy Dept., University of Virginia, Charlottesville, Va., USA |
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| Abstract: | Photometry of HD 155638=V792 Her has been analyzed to determine the elements of this totally eclipsing RS CVn binary. The light variation outside eclipse was found to have a period of 27d.07±0d.07, which is slightly different from the 27d.5384±0d.0045 orbital period. Analysis of the eclipses was achieved by a modification of the Russell-Merrill technique. With the aid of radial velocity measures, absolute elements were obtained for the hot and cool stars, respectively;R
h=2.58R
 ,R
c=12.28R
,M
h=1.40M
,M
c=1.46M
,i=80o.61 and velocity semi-amplitudesK
c=48.36 km s–1±0.79 km s–1, andK
h=50.50 km s–1±0.33 km s–1. The apparent magnitudes areV
h=9
m
.73 andV
c=8
m
.48. The distance to HD 155638 was estimated to be 310 parsecs. |
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