The period - K-band luminosity relation for pulsating variable red supergiants in the Galaxy and in M 33

Details The period - K-band luminosity relation for pulsating variable red supergiants in the Galaxy and in M 33 The period - K-band luminosity relation for pulsating variable red supergiants in the Galaxy and in M 33

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19..172d&link_type=abstract

Astronomy Letters, Vol. 19, p. 172-175; Pis'ma v Astronomicheskij Zhurnal (ISSN 0320-0108), vol. 19, no. 5, p. 443-449. In Russ

Astronomy and Astrophysics

Astronomy

5

Infrared Spectra, Magellanic Clouds, Milky Way Galaxy, Semiregular Variable Stars, Stellar Oscillations, Supergiant Stars, Red Giant Stars, Stellar Luminosity, Stellar Magnitude

Scientific paper

The paper reports the detection of a double-mode period - IR-luminosity relation for pulsating red supergiants (SRC-type variables) in the Galaxy. Distance moduli of LMC and of M 33 are estimated on the basis of the adopted distance modulus of 11.4 for the Per OB1 stellar association. The ratio of the first overtone pulsation period to that of the main tone is found to be the same both in the Galaxy and in M 33 (0.70 +/- 0.04).

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