Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276..836m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 276, Issue 3, pp. 836-846.
Astronomy and Astrophysics
Astronomy
2
Stars: Activity, Binaries: Eclipsing, Binaries: Spectroscopic, Stars: Individual: Gt Muscae
Scientific paper
GT Mus is a quadruple system comprising a long-period RS CVn-type binary (HD 101379) and a pair of eclipsing A dwarfs (HD 101380). Six and a half years of UBV (RI)_C photometry obtained at the Mt John University Observatory has enabled identification of four distinct types of photometric variability in this system. These are (1) a slowly changing mean magnitude, which probably arises from an activity-cycle-like effect in the active component of HD 101379, (2) a periodic variation (P_rot~64d), which is attributed to rotational modulation due to spots on the active star, (3) a periodic variation (P_eclipse=2.7546d) due to the eclipses of HD 101380, and (4) an excess in the I band, which occurs on a short time-scale (<1d) and is probably associated with HD 101379 activity. The evolution of the light curve of HD 101379 is fast with respect to the rotational period, suggesting rapid spot evolution for which we anticipate a possible model. The colours of HD 101379, even at maximum brightness, are excessively red for its spectral type, unless there is significant reddening by dust. Radial velocity measurements of HD 101379 are also presented, along with an improved determination of the orbit of this somewhat long-period (P_orb=61.448d) system.
Gilmore Alan C.
Hearnshaw John B.
Kilmartin Pam M.
Murdoch Kaylene A.
No associations
LandOfFree
A photometric and orbital analysis of GT MUSCAE 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 photometric and orbital analysis of GT MUSCAE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A photometric and orbital analysis of GT MUSCAE will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1355326