Period-luminosity relation for M-type semiregular variables from Hipparcos parallaxes

Details Period-luminosity relation for M-type semiregular variables from Hipparcos parallaxes Period-luminosity relation for M-type semiregular variables from Hipparcos parallaxes

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.355..601y&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 355, Issue 2, pp. 601-607.

Astronomy and Astrophysics

Astronomy

6

Stars: Distances, Stars: Fundamental Parameters, Stars: Late-Type, Stars: Oscillations

Scientific paper

We have studied the period-luminosity (P-L) relationships of oxygen-rich semiregular (SR) variables in several wavelength bands using Hipparcos parallaxes with an accuracy of better than 10 per cent. We have shown that there is a clear dependence on period of absolute magnitude in the U,B,V,R,IC,J,H,K,L,M,N, [12], [25], [60] and [100] bands, and that the slope of the linear Mλ- logP relation is a smooth function of wavelength. We point out that this relation can in principle be used to derive absolute bolometric magnitude as a function of period.
The behaviour of the second periods of SR variables in the P-L relation in the V and K bands is also discussed.

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