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The long-period variable stars of M33

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.

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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.

Item Type:Article
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Mould, Jeremy0000-0003-3820-1740
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.
Funding AgencyGrant Number
NSFAST 85-02518
NSFAST 87-21705
Subject Keywords:galaxies: individual (M33) - stars: long-period variables - stars: pulsation
Record Number:CaltechAUTHORS:20170320-122956612
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75243
Deposited By: George Porter
Deposited On:20 Mar 2017 19:44
Last Modified:15 Nov 2021 16:32

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