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Infrared variability and nature of symbiotic stars

Journal Article:

Abstract

Most symbiotic stars may be placed in one of two classes according to their infrared colours. In one group the systems contain an M type giant. In the other there is evidence for a star plus infrared emission from dust. JHKL photometry is given for three members of each class. Photometry of the VV Cephei system FR Sct is also given. No evidence for variability was found for systems without dust. The three systems with dust (RX Pup, RR Tel and PK 280-2/sup 0/.1) each show large variations of the stellar component (..delta..J, 1sup(m).6 to 2sup(m).7). It is concluded that these dusty systems contain Mira variables. For the systems without dust the mass transfer in the system is presumably through the inner Lagrangian point. For systems containing Miras it is possible that the companion accretes matter from a general stellar wind. Symbiotic systems containing Mira variables have more dust than average Mira variables. Either an unusually dense stellar wind is needed to produce a symbiotic system or such a system produces dust, perhaps in a high-density region resulting from the interaction of the stellar wind with the companion.
Authors:
Feast, M W; Robertson, B S.C.; Catchpole, R M [1] 
  1. Royal Observatory, Cape Town (South Africa)
Publication Date:
May 01, 1977
Product Type:
Journal Article
Reference Number:
AIX-08-326632; EDB-77-148346
Resource Relation:
Journal Name: Mon. Not. R. Astron. Soc.; (United Kingdom); Journal Volume: 179:2
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BINARY STARS; PHOTOMETRY; GIANT STARS; COLOR; COSMIC DUST; INFRARED RADIATION; MASS TRANSFER; SPECTRA; STAR MODELS; VARIATIONS; DUSTS; ELECTROMAGNETIC RADIATION; MATHEMATICAL MODELS; OPTICAL PROPERTIES; ORGANOLEPTIC PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
7297912
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: MNRAA
Submitting Site:
INIS
Size:
Pages: 499-508
Announcement Date:

Journal Article:

Citation Formats

Feast, M W, Robertson, B S.C., and Catchpole, R M. Infrared variability and nature of symbiotic stars. United Kingdom: N. p., 1977. Web.
Feast, M W, Robertson, B S.C., & Catchpole, R M. Infrared variability and nature of symbiotic stars. United Kingdom.
Feast, M W, Robertson, B S.C., and Catchpole, R M. 1977. "Infrared variability and nature of symbiotic stars." United Kingdom.
@misc{etde_7297912,
title = {Infrared variability and nature of symbiotic stars}
author = {Feast, M W, Robertson, B S.C., and Catchpole, R M}
abstractNote = {Most symbiotic stars may be placed in one of two classes according to their infrared colours. In one group the systems contain an M type giant. In the other there is evidence for a star plus infrared emission from dust. JHKL photometry is given for three members of each class. Photometry of the VV Cephei system FR Sct is also given. No evidence for variability was found for systems without dust. The three systems with dust (RX Pup, RR Tel and PK 280-2/sup 0/.1) each show large variations of the stellar component (..delta..J, 1sup(m).6 to 2sup(m).7). It is concluded that these dusty systems contain Mira variables. For the systems without dust the mass transfer in the system is presumably through the inner Lagrangian point. For systems containing Miras it is possible that the companion accretes matter from a general stellar wind. Symbiotic systems containing Mira variables have more dust than average Mira variables. Either an unusually dense stellar wind is needed to produce a symbiotic system or such a system produces dust, perhaps in a high-density region resulting from the interaction of the stellar wind with the companion.}
journal = {Mon. Not. R. Astron. Soc.; (United Kingdom)}
volume = {179:2}
journal type = {AC}
place = {United Kingdom}
year = {1977}
month = {May}
}