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

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...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2004-12, Vol.355 (2), p.601-607
Main Authors: Yeşilyaprak, C., Aslan, Z.
Format: Article
Language:English
Subjects:
stars: distances
stars: fundamental parameters
stars: late-type
stars: oscillations
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Summary: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.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2004.08344.x