Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1521v&link_type=abstract
The Astronomical Journal, vol. 107, no. 4, p. 1521-1528
Astronomy and Astrophysics
Astronomy
11
Eclipsing Binary Stars, Light Curve, Spectroscopy, Ubv Spectra, Variable Stars, Charge Coupled Devices, Luminosity, Particle Telescopes, Telescopes
Scientific paper
A complete BV light curve, from 14 nights of good data obtained with the Vanderbilt University-Tennessee State University (VU-TSU) automatic telescope, are presented and solved with the Wilson-Devinney program. Third light is evaluated, with the companion star brighter by 0.58m in V and 0.11m in B. The eclipses are partial. Inferred color indices yield F2 V and F8 V for the eclipsing pair and G8 IV-III for the distant companion star. After removing the variability due to eclipses, we study the residual variability of the G8 IV-III star over the ten years 1982 to 1992. Each yearly light curve is fit with a two-spot model. Three relatively long-lived spots are identified, with rotation periods of 85.9d, 85.9d, and 86.1d. The weak and intermittent variability is understood because the G8 IV-III star has a Rossby number at the threshold for the onset of heavy spottedness.
Barkslade W. S.
Chang Sandy
Fried Ralph E.
Green Clare L.
Hall David S.
No associations
LandOfFree
The two variables in the triple system HR 6469 = V819 Her: One eclipsing, one spotted 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 two variables in the triple system HR 6469 = V819 Her: One eclipsing, one spotted, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The two variables in the triple system HR 6469 = V819 Her: One eclipsing, one spotted will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1255212