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- W4315705884 abstract "We present new empirical infrared Period-Luminosity-Metallicity (PLZ) and Period-Wesenheit-Metallicity (PWZ) relations for RR Lyrae based on the latest Gaia EDR3 parallaxes. The relations are provided in the WISE $W1$ and $W2$ bands, as well as in the $W(W1, V - W1)$ and $W(W2, V - W2)$ Wesenheit magnitudes. The relations are calibrated using a very large sample of Galactic halo field RR Lyrae stars with homogeneous spectroscopic [Fe/H] abundances (over 1,000 stars in the $W1$ band), covering a broad range of metallicities ($-2.5 lesssim textrm{[Fe/H]} lesssim 0.0$). We test the performance of our PLZ and PWZ relations by determining the distance moduli of both galactic and extragalactic stellar associations: the Sculptor dwarf spheroidal galaxy in the Local Group (finding $bar{mu}_{0}=19.47 pm 0.06$), the Galactic globular clusters M4 ($bar{mu}_{0}=11.16 pm 0.05$) and the Reticulum globular cluster in the Large Magellanic Cloud ($bar{mu}_{0}=18.23 pm 0.06$). The distance moduli determined through all our relations are internally self-consistent (within $lesssim$ 0.05 mag) but are systematically smaller (by $sim$ 2-3$sigma$) than previous literature measurements taken from a variety of methods/anchors. However, a comparison with similar recent RR Lyrae empirical relations anchored with EDR3 likewise shows to varying extents a systematically smaller distance modulus for PLZ/PWZ RR Lyrae relations." @default.
- W4315705884 created "2023-01-12" @default.
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- W4315705884 date "2023-01-09" @default.
- W4315705884 modified "2023-10-16" @default.
- W4315705884 title "RR Lyrae mid-infrared Period-Luminosity-Metallicity and Period-Wesenheit-Metallicity relations based on Gaia DR3 parallaxes" @default.
- W4315705884 doi "https://doi.org/10.48550/arxiv.2301.03777" @default.
- W4315705884 hasPublicationYear "2023" @default.
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