The long-period variable stars of M 33

Details The long-period variable stars of M 33 The long-period variable stars of M 33

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99.1127m&link_type=abstract

(Astronomical Society of the Pacific, Symposium on Cool Stars and the Structure of Galaxies, Pomona College, Claremont, CA, July

Astronomy and Astrophysics

Astronomy

17

Galaxies, Infrared Photometry, Supergiant Stars, Variable Stars, Astronomical Photometry, Asymptotic Giant Branch Stars, Cepheid Variables, Color-Magnitude Diagram

Scientific paper

Infrared photometry of long-period variables in M 33 shows that the majority of those identified up to now are supergiants. The tip of the asymptotic giant branch may also be visible, but the present data are not adequate to decide the matter. Calibration photometry presented here confirms that the distance of M 33 is 890 kpc with an uncertainty of approximately 15 percent. The Cepheid and supergiant period-luminosity relations are in satisfactory agreement on this point.

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