The infrared JHK light curves of RR Lyr

Details The infrared JHK light curves of RR Lyr The infrared JHK light curves of RR Lyr

2007-12-04

arxiv.org/abs/0712.0578v1

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures, accepted for publication by MNRAS

Scientific paper

10.1111/j.1365-2966.2007.12804.x

We present infrared JHK time series photometry of the variable star RR Lyr, that allow us to construct the first complete and accurate infrared light curves for this star. The derived mean magnitudes are =6.74 +/- 0.02, =6.60 +/- 0.03 and =6.50 +/- 0.02. The magnitude is used to estimate the reddening, the mass, the mean luminosity and temperature of this variable star. The use of these RR Lyr data provide a more accurate absolute calibration of the P-L_K-[Fe/H] relation, and a distance modulus (m-M)_0=18.48 +/- 0.11 to the globular cluster Reticulum in the LMC.

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