\n This email address is being protected from spambots. You need JavaScript enabled to view it. ), CBLU, University of Leeds -->

A&A Supplement Ser., Vol. 124, July 1997, 143-151

Received September 13; accepted November 16, 1996

Mean light curves of long-period variables and discrimination between carbon- and oxygen-rich stars

M.O. Mennessier, H. Boughaleb, and J.A. Mattei

Send offprint request: This email address is being protected from spambots. You need JavaScript enabled to view it.

  Université Montpellier II, Groupe de Recherche en Astronomie et Astrophysique du Languedoc, Unité associée au CNRS, F-34095 Montpellier Cedex 5, France
  American Association of Variable Star Observers, 25 Birch Street, Cambridge, Massachusetts 02138-1205, U.S.A.
  Université des Sciences El Jadida, Maroc

Abstract:

Using 75 years of AAVSO data, mean light curve parameters of a sample of 355 long period M, S, and C mira and semi-regular variable stars are investigated. We present a classification of the light curves of LPVs into 6 distinct groups. Combining this classification with IRAS colors makes it possible to distinguish oxygen-rich from carbon-rich miras.

keywords: stars: AGB, post-AGB -- methods: data analysis -- stars: carbon -- stars: variables

 
• 1. Introduction
• 2. Basic data
• 3. Additional data
• 4. Parameters of the light curves
• 5. Automatic classification
• 6. IRAS colors and light-curve clustering
• 7. Discussion and outlook
• References