SIMBAD references

2021ApJ...912..144M - Astrophys. J., 912, 144-144 (2021/May-2)

Metallicity of galactic RR Lyrae from optical and infrared light curves. I. Period-Fourier-Metallicity relations for fundamental-mode RR Lyrae.

MULLEN J.P., MARENGO M., MARTINEZ-VAZQUEZ C.E., NEELEY J.R., BONO G., DALL'ORA M., CHABOYER B., THEVENIN F., BRAGA V.F., CRESTANI J., FABRIZIO M., FIORENTINO G., GILLIGAN C.K., MONELLI M. and STETSON P.B.

Abstract (from CDS):

We present newly calibrated period-ph31-[Fe/H] relations for fundamental-mode RR Lyrae stars in the optical and, for the first time, mid-infrared. This work's calibration data set provides the largest and most comprehensive span of parameter space to date, with homogeneous metallicities from -3 <= [Fe/H] <= 0.4 and accurate Fourier parameters derived from 1980 ASAS-SN (V band) and 1083 WISE (NEOWISE extension, W1 and W2 bands) RR Lyrae stars with well-sampled light curves. We compare our optical period-ph31-[Fe/H] relation with those available in the literature and demonstrate that our relation minimizes systematic trends in the lower and higher metallicity range. Moreover, a direct comparison shows that our optical photometric metallicities are consistent with both those from high-resolution spectroscopy and globular clusters, supporting the good performance of our relation. We found an intrinsic scatter in the photometric metallicities (0.41 dex in the V band and 0.50 dex in the infrared) by utilizing large calibration data sets covering a broad metallicity range. This scatter becomes smaller when optical and infrared bands are used together (0.37 dex). Overall, the relations derived in this work have many potential applications, including large-area photometric surveys with James Webb Space Telescope in the infrared and LSST in the optical.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): RR Lyrae variable stars - RRab variable stars - Pulsating variable stars - Globular star clusters - Metallicity

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 11

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2021.07.29-08:08:31

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