Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-06
Mon.Not.Roy.Astron.Soc. 329 (2002) L7
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures, to be published in MNRAS (pink pages)
Scientific paper
10.1046/j.1365-8711.2002.05126.x
A globular cluster distance scale based on Hipparcos parallaxes of subdwarfs has been used to derive estimates of M_K for cluster Miras, including one in the SMC globular cluster NGC121. These lead to a zero-point of the Mira infrared period-luminosity relation, PL(K), in good agreement with that derived from Hipparcos parallaxes of nearby field Miras. The mean of these two estimates together with data on LMC Miras yields an LMC distance modulus of 18.60 +/- 0.10 in evident agreement with a metallicity corrected Cepheid modulus (18.59 +/- 0.10). The use of luminous AGB stars as extragalactic population indicators is also discussed.
Feast Michael
Menzies John
Whitelock Patricia
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