IRAS observations of classical novae. II. Modeling the detections
- Mount Stromlo and Siding Spring Observatories, Canberra (Australia) Minnesota Univ., Minneapolis (USA)
The analysis of IRAS data on 64 classical novae extracted since an initial study of 41 novae (Harrison and Gehrz, 1988) is reported, and it is concluded that 45 of the 105 novae investigated were detected by IRAS. A model is presented that compares the IRAS detections of novae with predictions of the strength of the far-infrared forbidden line emission from the gaseous ejecta. The distances are known for 23 of the 45 detected novae so that this sample of 23 can be used to compare the fluxes observed at earth with fluxes predicted by the line emission model. The fluxes from 9 of these 23 novae can be explained by line emission given relatively conservative assumptions about the physical conditions in their shells. Accepting more extreme values for these parameters makes it possible to attribute three more detections to possible line emission. There are 11 novae whose IRAS detections remain difficult to explain, even when dust emission and free-free emission are considered as alternatives to line emission. 75 refs.
- OSTI ID:
- 5702634
- Journal Information:
- Astronomical Journal; (USA), Vol. 101; ISSN 0004-6256
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
NOVAE
DETECTION
FAR INFRARED RADIATION
DATA ANALYSIS
DISTANCE
ELEMENT ABUNDANCE
EMISSION SPECTRA
MATHEMATICAL MODELS
SATELLITES
ABUNDANCE
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
INFRARED RADIATION
RADIATIONS
SPECTRA
STARS
VARIABLE STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources