A photometric and orbital analysis of GT Muscae

A photometric and orbital analysis of GT Muscae

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...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 1995-10, Vol.276 (3), p.836-846
Hauptverfasser: Murdoch, K. A., Hearnshaw, J. B., Kilmartin, P. M., Gilmore, A. C.
Format: Artikel
Sprache:eng
Schlagworte:
binaries: eclipsing
binaries: spectroscopic
stars: activity
stars: individual: GT Muscae
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Zusammenfassung: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 (Prot ~64 d), which is attributed to rotational modulation due to spots on the active star, (3) a periodic variation (Peclipse = 2.7546 d) due to the eclipses of HD 101380, and (4) an excess in the I band, which occurs on a short time-scale (
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/276.3.836