SIMBAD references

2023ApJ...951..114Z - Astrophys. J., 951, 114 (2023/July-2)

New Near-infrared Period-Luminosity-Metallicity Relations for Galactic RR Lyrae Stars Based on Gaia EDR3 Parallaxes.

ZGIRSKI B., PIETRZYNSKI G., GORSKI M., GIEREN W., WIELGORSKI P., KARCZMAREK P., HAJDU G., LEWIS M., CHINI R., GRACZYK D., KALUSZYNSKI M., NARLOCH W., PILECKI B., ROJAS GARCIA G., SUCHOMSKA K. and TAORMINA M.

Abstract (from CDS):

We present new period-luminosity and period-luminosity-metallicity relations for Galactic RR Lyrae stars based on a sample of 28 pulsators located at distances of up to 1.5 kpc from the Sun. Near-infrared photometry was obtained at the Cerro Armazones Observatory, and parallaxes were taken from the Gaia Early Data Release 3. Relations were determined for the 2MASS JHKs bands and the WJK Wesenheit index. We compare our results with other calibrations available in the literature and obtain very good agreement with the photometry of RR Lyraes from the Large Magellanic Cloud (LMC) anchored using the distance to the Cloud, which is based on detached eclipsing binaries. We find that the dependence of absolute magnitudes on metallicity of 0.070 ± 0.042 (J band) to 0.087 ± 0.031 (WJK index) mag dex–1 for the population of fundamental pulsators (RRab) is in agreement with previously published phenomenological works. We perform a refined determination of distance to the LMC based on our new calibration and photometry from Szewczyk et al. We study the dependence of the fitted parameters of the fiducial relations and the LMC distance on the systematic parallax offset.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Distance indicators - Near infrared astronomy - RR Lyrae variable stars - Solar neighborhood - Large Magellanic Cloud - Absolute magnitude - Stellar parallax

Simbad objects: 34

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