SPECTROSCOPY OF LONG-PERIOD VARIABLES IN M33

Authors
GIOVAGNOLI A MOULD J
Citation
A. Giovagnoli et J. Mould, SPECTROSCOPY OF LONG-PERIOD VARIABLES IN M33, Publications of the Astronomical Society of the Pacific, 106(698), 1994, pp. 376-381
Citations number
20
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
698
Year of publication
1994
Pages
376 - 381
Database
ISI
SICI code
0004-6280(1994)106:698<376:SOLVIM>2.0.ZU;2-V
Abstract
Spectrophotometry of 36 long-period variable stars in M33 is presented . Most of them show strong TiO bands. These spectra together with publ ished photometry indicate that the red variables exceeding 5 X 10(4) L . are M supergiants, evolved from young massive stars which are promin ent in this galaxy. A small number of lower-luminosity stars are prese nt in this sample. These are asymptotic-giant-branch stars. We identif y two of them as carbon stars. There are no strong S stars.