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Optical spectroscopy of HH-exciting stars from scattered light continuaOptical spectra of the reflected light continua visible in parts of several Herbig-Haro objects are presented. HH 100 unmistakably scatters the chromospheric spectrum of a strong emission-line T Tau star. HH 48S also reflects a T Tau stellar spectrum, as perhaps do HH 24 and HH 55, but less convincingly. HH 55 reveals photospheric absorption features too, corresponding to an M3.5 T Tau star. The continuum in HH 120 (= CG 30 HH) is unclassifiable while that in HH 46A has dimmed considerably (by a factor of order 20) although, only 7 yr ago, it clearly reflected a strong-line T Tau spectrum. It is concluded that at least some of the stars that excite Herbig-Haro nebulae, even when those stars are not directly visible, pass through a strong-line T Tau phase, and can undergo abrupt and dramatic changes in visual luminosity.
Document ID
19870023922
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cohen, M.
(NASA Ames Research Center Moffett Field; California, University, Berkeley, United States)
Dopita, M. A.
(Mount Stromlo and Siding Spring Observatories Canberra, Australia)
Schwartz, R. D.
(Missouri-Saint Louis, University United States)
Date Acquired
August 13, 2013
Publication Date
August 1, 1986
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 307
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A11196
Funding Number(s)
CONTRACT_GRANT: NSF AST 85-03976
CONTRACT_GRANT: NCC2-142
Distribution Limits
Public
Copyright
Other

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