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He 2-104: a link between symbiotic stars and planetary nebulae
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Aspin, Colin Kaler, James B. Lutz, Julie H. Shaw, Richard A. Schwarz, Hugo E. |
| Copyright Year | 1989 |
| Description | 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. |
| File Size | 1027632 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890020768 |
| Archival Resource Key | ark:/13960/t23c0z51c |
| Language | English |
| Publisher Date | 1989-05-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Stellar Spectra Red Giant Stars Ultraviolet Radiation Stellar Mass Ejection Infrared Radiation Symbiotic Stars Planetary Nebulae Estimates Accretion Disks Stellar Models Interstellar Matter Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
