Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-26T03:16:28.819Z Has data issue: false hasContentIssue false
  • English
  • Français

Investigation of a Sample of Long-Period Variable Stars Possessing Maser Emission

Published online by Cambridge University Press:  12 April 2016

I.L. Andronov ,
L.S. Kudashkina  and
G.M. Rudnitskij
I.L. Andronov
Affiliation:
Astronomical Observatory, Odessa State University, Odessa270014, USSR
L.S. Kudashkina
Affiliation:
Astronomical Observatory, Odessa State University, Odessa270014, USSR
G.M. Rudnitskij
Affiliation:
Sternberg Astronomical Institute, Moscow State University, MoscowV-234, 119899, USSR

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

An investigation of parameters of a sample of more than two hundred late-type long-period variable stars (LPVs) has been carried out. In more detail were studied 13 giants (Mira Ceti-type variables R Aql, RR Aql, RT Aql, R Leo, U Ori, U Her, R Cas, R Tau, Z Cyg, R Peg, U Aur and semiregular variables RT Vir and RX Boo) and 2 supergiants (S Per, PZ Cas). A considerable fraction of the sample stars (about one third) possess circumstellar maser emission in molecular spectral lines (OH, H20, SiO). Our aim was to elucidate the particularities of photometric characteristics of maser stars, such as period P, amplitude A, light curve asymmetry f = (M-m)/P, and, in prospect, to determine their status in course of their evolution on the asymptotic giant branch. An extensive comparison with non-maser LPVs was made.

Type
4. The Variability-Evolution Connection
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 298
Copyright
Copyright © Cambridge University Press 1989