Stellar Companions and the Age of HD 141569 and Its Circumstellar Disk | Zendy

Alycia J. Weinberger | Zendy; R. Michael Rich | Zendy; E. E. Becklin | Zendy; B. Zuckerman | Zendy; K. Matthews | Zendy

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Stellar Companions and the Age of HD 141569 and Its Circumstellar Disk

Author(s) -

Alycia J. Weinberger,

R. Michael Rich,

E. E. Becklin,

B. Zuckerman,

K. Matthews

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/317243

Subject(s) - circumstellar disk , debris disk , physics , stars , astrophysics , herbig ae/be star , astronomy , main sequence , proper motion , t tauri star , k type main sequence star , planetary system

We investigate the stellar environment of the Beta Pictoris-like star HD141569 with optical spectroscopy and near infrared imaging. The B9.5Ve primary,and an M2 and an M4 type star both located in projection less than ninearseconds away have the same radial velocity and proper motion and thereforealmost certainly form a triple star system. From their x-ray flux, lithiumabsorption and location on pre-main-sequence evolutionary tracks, thecompanions appear to be 5 Myr old. HD 141569 A is now one of the few stars witha circumstellar disk that has a well-determined age. The circumstellar disk iscomposed of secondary debris material (Fisher et al. 2000), thus placing anupper limit on the time needed for disk processing. These three stars may bepart of an association of young stars.Comment: 18 pages incl. 7 ps figures, aastex v5.0, accepted for publication in Ap

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