A PRELIMINARY CALIBRATION OF THE RR LYRAE PERIOD-LUMINOSITY RELATION AT MID-INFRARED WAVELENGTHS: WISE DATA

被引：41
作者：
Madore, Barry F. [1 ]
Hoffman, Douglas [2 ]
Freedman, Wendy L. [1 ]
Kollmeier, Juna A. [1 ]
Monson, Andy [1 ]
Persson, S. Eric [1 ]
Rich, Jeff A., Jr. [1 ]
Scowcroft, Victoria [1 ]
Seibert, Mark [1 ]
机构：
[1] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
[2] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA
来源：
ASTROPHYSICAL JOURNAL | 2013年 / 776卷 / 02期
基金：
美国国家航空航天局;
关键词：
stars: Population II; stars: variables: RR Lyrae; CARNEGIE HUBBLE PROGRAM; LARGE-MAGELLANIC-CLOUD; TRIGONOMETRIC PARALLAXES; INTERSTELLAR EXTINCTION; DISTANCE SCALE; LEAVITT LAW; MU-M; STARS; CONSTANT;
D O I：
10.1088/0004-637X/776/2/135
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using time-resolved, mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) and geometric parallaxes from the Hubble Space Telescope for four Galactic RR Lyrae variables, we derive the following Population II period-luminosity (PL) relations for the WISE [W1], [W2], and [W3] bands at 3.4, 4.6, and 12 mu m, respectively: M-[W1] = -2.44(+/- 0.95) x log(P) - 1.26(+/- 0.25) sigma = 0.10 M-[W2] = -2.55(+/- 0.89) x log(P) - 1.29(+/- 0.23) sigma = 0.10 M-[W3] = -2.58(+/- 0.97) x log(P) - 1.32(+/- 0.25) sigma = 0.10. The slopes and the scatter around the fits are consistent with a smooth extrapolation of those same quantities from previously published K-band observations at 2.2 mu m, where the asymptotic (long-wavelength) behavior is consistent with a period-radius relation with a slope of 0.5. No obvious correlation with metallicity (spanning 0.4 dex in [Fe/H]) is found in the residuals of the four calibrating RR Lyrae stars about the mean PL regression line.
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页数：6
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