SIMBAD references

2010AJ....139.1106R - Astron. J., 139, 1106-1116 (2010/March-0)

Activity on the M star of QS Vir.

RIBEIRO T., KAFKA S., BAPTISTA R. and TAPPERT C.

Abstract (from CDS):

We report analysis of VRIJH photometry and phase-resolved optical spectroscopy of the eclipsing DA white dwarf (WD) plus dMe dwarf binary QS Vir. Modeling of the photometric data yields an inclination of i = 74.9±0.6 and a mass ratio of q = M2/M1= 0.50±0.05. Our Doppler maps indicate the presence of material in the Roche lobe of the WD, at a location near the M star, likely due to accretion from the stellar wind of the M star (as opposed to Roche-lobe overflow accretion). We also constructed images of the brightness distribution of the M star at different epochs which reveal the location of two stable active regions. Doppler tomography shows that the majority of the hydrogen and Ca II H&K emission originates on the active M dwarf, likely distributed in two preferred activity longitudes, similar to active regions on BY Dra and FK Comae systems.

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Journal keyword(s): binaries: eclipsing - stars: activity - stars: individual: QS Vir

Simbad objects: 6

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