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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/210875
- The period-luminosity relation for long-period variables in M31
- Mould, Jeremy; Saha, Abhijit; Hughes, Shaun
- A significant fraction of the disk of M31 has been surveyed for long-period variable stars. We report the results, including near-infrared photometry of almost 2000 variables, and light curves in the i band. The period-luminosity relation suggests that most of the variables are asymptotic giant branch stars, and their luminosity function can be understood in terms of mass-loss rates, which increase with increasing luminosity on the giant branch, and star formation rates, which were a few times higher a billion years ago in M31 than they are today. We see some supergiant long-period variables, but somewhat fewer than expected based on their frequency in M33, and confined to the ring of star formation in M31 seen in the IRAS and 2MASS surveys.
- Publication type
- Journal article
- The Astrophysical Journal Supplement Series, Vol. 154, no. 2 (Oct 2004), pp. 623-631
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences; 0305 Organic Chemistry; 0306 Physical Chemistry (Incl. Structural)
- Galaxies: individual (M31); Infrared: stars; Stars: AGB and post-AGB; Stars: variables: other
- University of Chicago Press
- Publisher URL
- Copyright © 2004 The American Astronomical Society. All rights reserved. The American Astronomical Society does not allow institutions to archive either the accepted manuscript or the published version of the article.
- Peer reviewed