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He 2-104 - A link between symbiotic stars and planetary nebulae?Ultraviolet, optical and infrared observations of He 2-104 are presented, and estimates for some of the physical properties of the nebular shell are made. It is argued that He 2-104 is in transition between the D-type symbiotic star and bipolar planetary nebula phases and, as such, represents a link between subclasses of these two types of objects. The model includes a binary system with a Mira variable and a hot, evolved star. Previous mass loss has resulted in the formation of a disk of gas and dust around the whole system, while the hot star has an accretion disk which produces the observed highly ionized emission line spectrum. Emission lines from cooler, lower density gas is also observed to come from the nebula. In addition, matter is flowing out of the system in a direction perpendicular to the disk with a high velocity and is impacting upon the previously-ejected red giant wind and/or the ambient interstellar medium.
Document ID
19900033107
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lutz, Julie H.
(Washington State University Pullman, United States)
Kaler, James B.
(Illinois, University Urbana, United States)
Shaw, Richard A.
(NASA Goddard Space Flight Center; Computer Sciences Corp. Greenbelt, MD, United States)
Schwarz, Hugo E.
(European Southern Observatory Santiago, Chile)
Aspin, Colin
(Joint Astronomy Center Hilo, HI, United States)
Date Acquired
August 14, 2013
Publication Date
November 1, 1989
Publication Information
Publication: Astronomical Society of the Pacific, Publications
Volume: 101
ISSN: 0004-6280
Subject Category
Astrophysics
Accession Number
90A20162
Funding Number(s)
CONTRACT_GRANT: NAG5-410
CONTRACT_GRANT: NSF AST-88-13686
CONTRACT_GRANT: NSF AST-85-14908
CONTRACT_GRANT: NSF AST-84-19355
Distribution Limits
Public
Copyright
Other

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