Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....126.1960y&link_type=abstract
The Astronomical Journal, Volume 126, Issue 4, pp. 1960-1966.
Astronomy and Astrophysics
Astronomy
6
Stars: Activity, Stars: Binaries: Close, Stars: Individual (Rz Tauri), Stars: Spots
Scientific paper
New BV light curves and photometric solutions for the W Ursae Majoris binary RZ Tauri (spectral type F0) are presented. The light curves appear to exhibit a typical O'Connell effect, with primary maximum being 0.023 mag (V) and 0.030 mag (B) brighter than secondary maximum. From the present times of minimum light and those collected from the literature, the changes in the orbital period of the system are analyzed. The results suggest that the orbital period of RZ Tau continuously increases at a rate of dp/p=1.10×10-10 and that a short-term wavelike variation with an amplitude of ΔP=3.8×10-6 days and a period of Pmod=60 yr are superposed on the secular increase. The orbital period increase may be explained by mass transfer from the less massive to the more massive component at a rate of Δm/Δt=8.81×10-8 Msolar yr-1, and the short-term oscillations may be due to magnetic activity on the secondary component. The present light curves and the radial velocity curves obtained by Struve et al. in 1950 were analyzed by means of the latest version of the Wilson-Devinney code. The results suggest that RZ Tau is an A-subtype W UMa contact binary with a mass ratio of 0.379. The asymmetry of the light curves may be explained by a cool spot on the secondary component. The basic parameters of the system are be found to be M1=1.70+/-0.16 Msolar, M2=0.64+/-0.06 Msolar, R1=1.56+/-0.07 Rsolar, R2=1.04+/-0.05 Rsolar, L1=6.19+/-0.61 Lsolar, and L2=2.60+/-0.27 Lsolar.
Liu Qingyao
Yang Yulan
No associations
LandOfFree
RZ Tauri: An Unstable W Ursae Majoris Binary with a Magnetically Active Component 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 RZ Tauri: An Unstable W Ursae Majoris Binary with a Magnetically Active Component, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RZ Tauri: An Unstable W Ursae Majoris Binary with a Magnetically Active Component will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-912715