Stellar Companions and the Age of HD 141569 and Its Circumstellar Disk
Abstract
We investigate the stellar environment of the β Pictoris-like star HD 141569 with optical spectroscopy and near-infrared imaging. The B9.5 Ve primary and two other stars (types M2 and M4) both located in projection less than 9'' away have the same radial velocity and proper motion and therefore almost certainly form a triple star system. From their X-ray flux, lithium absorption, and location on pre-main-sequence evolutionary tracks, the companions appear to be 5 Myr old. HD 141569A is now one of the few main-sequence stars with a circumstellar disk that has a well-determined age. The circumstellar disk is composed of secondary debris material, thus placing an upper limit on the time needed for disk processing. These three stars may be part of an association of young stars.
Additional Information
© 2000. The American Astronomical Society. Received 2000 March 30; accepted 2000 July 13. We thank G. Neugebauer for donating 200 inch Telescope time to this project. We thank B. Schaefer and R. Quick for making the LRIS observations at the W. M. Keck Observatory, which is operated as a scientific partnership between the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration, and made possible by the generous financial support of the W. M. Keck Foundation. This work is supported in part by NASA grant NAG 5-3042, and based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. We also thank M. Jura for many helpful discussions.Attached Files
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Additional details
- Eprint ID
- 76183
- Resolver ID
- CaltechAUTHORS:20170408-162607780
- W. M. Keck Foundation
- NAG 5-3042
- NASA
- NAS 5-26555
- NASA
- Created
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2017-08-09Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field