The long-period variable stars of M33

Details The long-period variable stars of M33 The long-period variable stars of M33

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349..503m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Feb. 1, 1990, p. 503-509.

Astronomy and Astrophysics

Astrophysics

14

Spiral Galaxies, Stellar Luminosity, Stellar Oscillations, Variable Stars, Asymptotic Giant Branch Stars, Cepheid Variables, Color-Color Diagram, Magellanic Clouds

Scientific paper

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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