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The (BETA) Pictoris Phenomenon Among Herbig Ae/Be StarsWe present a survey of high dispersion UV and optical spectra of Herbig Ae/Be (HAeBe) and related stars. We find accreting, circumstellar gas over the velocity range +100 to +400 km/s, and absorption profiles similar to those seen toward Beta Pic, in 36% of the 33 HAeBe stars with IUE data as well as in 3 non-emission B stars. We also find evidence of accretion in 7 HAeBe stars with optical data only. Line profile variability appears ubiquitous. As a group, the stars with accreting gas signatures have higher v sin i than the stars with outflowing material, and tend to exhibit large amplitude (greater than or equal to 1(sup m)) optical light variations. All of the program stars with polarimetric variations that are anti-correlated with the optical light, previously interpreted as the signature of a dust disk viewed close to equator-on, also show spectral signatures of accreting gas. These data imply that accretion activity in HAeBe stars is preferentially observed when the line of sight transits the circumstellar dust disk. Our data imply that the spectroscopic signatures of accreting circumstellar material seen in Beta Pic are not unique to that object, but instead are consistent with interpretation of Beta Pic as a comparatively young A star with its associated circumstellar disk.
Document ID
19990063749
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Grady, C. A.
(Eureka Scientific, Inc. Oakland, CA United States)
Perez, M. R.
(Applied Research Corp. Landover, MD United States)
Talavera, A.
(Laboratorio de Astrofisica Espacial y Fisica Fundamental Madrid, Spain)
Bjorkman, K. S.
(Wisconsin Univ. Madison, WI United States)
deWinter, D.
(Astronomical Inst. Amsterdam, Netherlands)
The, P.-S.
(Astronomical Inst. Amsterdam, Netherlands)
Molster, F. J.
(Astronomical Inst. Amsterdam, Netherlands)
vandenAncker, M. E.
(Astronomical Inst. Amsterdam, Netherlands)
Sitko, M. L.
(Cincinnati Univ. OH United States)
Morrison, N. D.
(Ritter Observatory Toledo, OH United States)
Beaver, M. L.
(Ritter Observatory Toledo, OH United States)
McCollum, B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Castelaz, M. W.
(State Univ. of East Tennessee Johnson City, TN United States)
Date Acquired
August 19, 2013
Publication Date
November 2, 1996
Publication Information
Publication: Astronomy and Astrophysics Supplement Series
Publisher: Editions de Physique
Volume: 120
Subject Category
Astronomy
Distribution Limits
Public
Copyright
Other

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