Time-series photometric spot modeling. IV. The multi-periodic K5Ve binary V833 Tauri
作者： K. Oláh , K. G. Strassmeier , Zs. Kővári , E. F. Guinan
DOI: 10.1051/0004-6361:20010362
关键词: K-type main-sequence star 、 Energy (signal processing) 、 Light curve 、 Physics 、 Astrophysics 、 Photosphere 、 Flare 、 Flare star 、 Scale (descriptive set theory) 、 Starspot
摘要: We analysed all the existing photometric observations of V833 Tau and found long-term variability on time scales ≈ 70 years, 6.5 years 2.4 years. Using V I C -band data from 1990-2000, we obtained starspot surface distributions 20 suitable light curves. that spot-area changes generally follow variations. Spot temperatures are determined for each datasets an average value $1230 {\rm K}\pm270$ K relative to photosphere is found. This agrees with previous results TiO modeling ($1330 K}\pm110$ K). Small scale spot temperature area recovered during 1997-1999, explain a variable spot/faculae ratio. A powerful flare in $UBV(RI)_{\rm C}$ was observed 1993 November. 10 000 fit yielded total emitted energy more than 34 ergs about 1.3% stellar surface, 60% it $V(RI)_{\rm bands. The characteristics compared another, 100-times smaller earlier 1983.
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