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Astron. Astrophys. 320, 79-90 (1997)

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Mass-luminosity relation of low mass stars *

O.Yu. Malkov 1, A.E. Piskunov 1 and D.A. Shpil'kina 2

1 Institute of Astronomy of the Russian Acad. Sci., 48 Pyatnitskaya St., Moscow 109017, Russia
(OMALKOV at INASAN.RSSI.RU, PISKUNOV at INASAN.RSSI.RU)
2 Sternberg State Astronomical Institute, 13 Universitetskij Prospekt, Moscow 119899, Russia

Received 4 October 1994 / Accepted 12 September 1996

Abstract

The data on dynamic masses and multicolor photometry of 56 M-type components of binary/multiple systems was collected. Critical evaluation of late type stars bolometric correction scales have been performed. Our refined and reduced data is compared with published empirical and theoretical mass-luminosity relations. Our data does not exclude the existence of a step-like feature at [FORMULA]. The best agreement between observations and theoretical models is found for recent calculations of D'Antona & Mazzitelli (1994) with Alexander opacities. We conclude that present-day knowledge of the mass-luminosity relation at faintest magnitudes is not sufficient for making definite conclusions on the initial mass function of low mass stars.

Key words: low mass stars – stars: fundamental parameters – stars: luminosity function, mass function

* Tables 2 and 4 are only available in electronic form at CDS via ftp 130.79.128.5 or http://cdsweb.u-strasbg.fr/abstract.html

Send offprint requests to: O. Yu. Malkov

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© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998
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