Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves. I. Period-Fourier-Metallicity Relations for Fundamental-mode RR Lyrae

被引:32
|
作者
Mullen, Joseph P. [1 ]
Marengo, Massimo [1 ]
Martinez-Vazquez, Clara E. [2 ]
Neeley, Jillian R. [3 ]
Bono, Giuseppe [4 ,5 ]
Dall'Ora, Massimo [6 ]
Chaboyer, Brian [7 ]
Thevenin, Frederic [8 ]
Braga, Vittorio F. [5 ,9 ]
Crestani, Juliana [4 ,5 ,10 ]
Fabrizio, Michele [5 ,9 ]
Fiorentino, Giuliana [5 ]
Gilligan, Christina K. [7 ]
Monelli, Matteo [11 ,12 ]
Stetson, Peter B. [13 ]
机构
[1] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[2] NSFs Natl Opt Infrared Astron Res Lab, Cerro Tololo Inter Amer Observ, Casilla 603, La Serena, Chile
[3] Florida Atlantic Univ, Dept Phys, 777 Glades Rd, Boca Raton, FL 33431 USA
[4] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy
[5] INAF Osservatorio Astron Roma, Via Frascati 33, I-100078 Monte Porzio Catone, Italy
[6] INAF Osservatorio Astron Capodimonte, Salita Moiariello 16, I-80131 Naples, Italy
[7] Dartmouth Coll, Dept Phys & Astron, 6127 Wilder Lab, Hanover, NH 03755 USA
[8] Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange, BP 4229, F-06304 Nice, France
[9] Space Sci Data Ctr ASI, Via Politecn Snc, I-00133 Rome, Italy
[10] Univ Fed Rio Grande do Sul, Dept Astron, Av Bento Goncalves 6500, BR-91501970 Porto Alegre, RS, Brazil
[11] IAC Inst Astrofis Canarias, Calle Via Lactea S-N, E-38205 Tenerife, Spain
[12] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain
[13] Natl Res Council Canada, Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
来源
ASTROPHYSICAL JOURNAL | 2021年 / 912卷 / 02期
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
SMALL-MAGELLANIC-CLOUD; STARS; VARIABLES; ABUNDANCES; CLUSTERS; FE/H;
D O I
10.3847/1538-4357/abefd4
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present newly calibrated period-phi (31)-[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 less than or similar to [Fe/H] less than or similar to 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-phi (31)-[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.
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页数:18
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