IR observations of Mira variables (Whitelock+, 2008)

Details IR observations of Mira variables (Whitelock+, 2008) IR observations of Mira variables (Whitelock+, 2008)

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..73860313w&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/386/313. Originally published in: 2008MNRAS.386..313W

Physics

Magellanic Clouds, Stars: Variable, Photometry: Infrared

Scientific paper

Published data for large-amplitude asymptotic giant branch variables in the Large Magellanic Cloud (LMC) are re-analysed to establish the constants for an infrared (K) period-luminosity relation of the form MK={rho}[logP-2.38]+δ. A slope of {rho}=-3.51+/-0.20 and a zero-point of δ=-7.15+/-0.06 are found for oxygen-rich Miras (if a distance modulus of 18.39+/-0.05 is used for the LMC). Assuming this slope is applicable to Galactic Miras we discuss the zero-point for these stars using the revised Hipparcos parallaxes together with published very long baseline interferometry (VLBI) parallaxes for OH masers and Miras in globular clusters. These result in a mean zero-point of δ=-7.25+/-0.07 for O-rich Galactic Miras. The zero-point for Miras in the Galactic bulge is not significantly different from this value.
(3 data files).

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