Mould, Jeremy and Graham, James R. and Matthews, Keith and Neugebauer, Gerry and Elias, Jonathan (1990) The long-period variable stars of M33. Astrophysical Journal, 349 . pp. 503-509. ISSN 0004-637X. doi:10.1086/168336. https://resolver.caltech.edu/CaltechAUTHORS:20170320-122956612
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Abstract
Infrared photometry of long-period variables (LPVs) in M33 shows that the majority of those identified up to now are supergiants. The period-luminosity relation for these stars yields a distance of M33 of 760 kpc with a 10 percent uncertainty. This uncertainty primarily reflects the uncertain distance of the Large Magellanic Cloud, although the broader P - L relation of M33 is a contributing factor. Cepheid period-luminosity relations yield a distance at the low end of this range; RR Lyrae stars tend toward the high end. The remaining LPVs are asymptotic giant branch stars. There is one confirmed carbon star among them.
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| Additional Information: | © 1990 American Astronomical Society. Received 1989 May 22; accepted 1989 July 31. We gratefully acknowledge support for this project from NSF grant 85-02518 and 87-21705. We also thank Alain Picard for assistance in obtaining the carbon star spectrum, Vance Heron and Sean Lin for help with the infrared camera, and the staff of Palomar Observatory. | |||||||||
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| Subject Keywords: | galaxies: individual (M33) - stars: long-period variables - stars: pulsation | |||||||||
| DOI: | 10.1086/168336 | |||||||||
| Record Number: | CaltechAUTHORS:20170320-122956612 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170320-122956612 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 75243 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 20 Mar 2017 19:44 | |||||||||
| Last Modified: | 15 Nov 2021 16:32 |
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