Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...455..300h&link_type=abstract
Astrophysical Journal v.455, p.300
Astronomy and Astrophysics
Astronomy
13
Stars: Binaries: Eclipsing, Stars: Individual Constellation Name: Vz Piscium
Scientific paper
The short-period binary VZ Piscium is unusual in that it has a high space velocity, indicating that it is old, and a high mass ratio, suggesting that it is presently evolving into contact with little mass exchange having occurred between the components. In this study, we obtained lUE and visible spectra to investigate Mg II h + k and Ca II H and K emission strengths. Both features are found to be strong and variable. From the visible spectra, radial velocities were measured, and a new mass ratio of q = 0.80 was determined. This mass ratio was used in a new light-curve analysis, and the system was found to be in marginal contact, with the secondary component slightly detached. A model with bright (hot) regions on the inner hemisphere of the slightly detached, less massive component was found to fit well with the variety of spectroscopic and photometric observations of the system. The masses determined for the components are compatible with normal K dwarfs.
Guinan Edward F.
Hrivnak Bruce J.
Lu Wenxian
No associations
LandOfFree
A Study of the Chromospherically Active, Short-Period Binary VZ PISCIUM 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 A Study of the Chromospherically Active, Short-Period Binary VZ PISCIUM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Study of the Chromospherically Active, Short-Period Binary VZ PISCIUM will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1258196