The Absolute Magnitudes of RR Lyrae Stars

Details The Absolute Magnitudes of RR Lyrae Stars The Absolute Magnitudes of RR Lyrae Stars

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..635f&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 635-638

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Scientific paper

Using firstly, the Hipparcos proper motions and the method of Statistical Parallax and secondly, the Hipparcos parallax of RR Lyrae itself and thirdly, the Baade-Wesselink results from the literature we find the zero-point of the RR Lyrae absolute magnitude - metallicity relation to be M_v = 0.72 +/- 0.10 at [Fe/H] = -1.52. The small error on this zero-point reflects the remarkably good agreement between the three (independent) methods. Taking a value of 0.18 +/- 0.03 for the slope of the relation from the literature we obtain a distance modulus of the LMC of 18.31. This is compared to other recent determinations of the distance to the LMC.

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