A preliminary calibration of the RR Lyrae period-luminosity relation at mid-infrared wavelengths: Wise data

Barry F. Madore; Douglas Hoffman; Wendy L. Freedman; Juna A. Kollmeier; Andy Monson; S. Eric Persson; Jeff A. Rich; Victoria Scowcroft; Mark Seibert

doi:10.1088/0004-637X/776/2/135

A preliminary calibration of the RR Lyrae period-luminosity relation at mid-infrared wavelengths: Wise data

Barry F. Madore, Douglas Hoffman, Wendy L. Freedman, Juna A. Kollmeier, Andy Monson, S. Eric Persson, Jeff A. Rich, Victoria Scowcroft, Mark Seibert

Astronomy & Astrophysics

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Abstract

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 μm, respectively: 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 μm, 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.

Original language	English (US)
Article number	135
Journal	Astrophysical Journal
Volume	776
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/776/2/135
State	Published - Oct 20 2013

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/776/2/135

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title = "A preliminary calibration of the RR Lyrae period-luminosity relation at mid-infrared wavelengths: Wise data",

abstract = "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 μm, respectively: 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 μm, 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.",

author = "Madore, {Barry F.} and Douglas Hoffman and Freedman, {Wendy L.} and Kollmeier, {Juna A.} and Andy Monson and {Eric Persson}, S. and Rich, {Jeff A.} and Victoria Scowcroft and Mark Seibert",

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T1 - A preliminary calibration of the RR Lyrae period-luminosity relation at mid-infrared wavelengths

T2 - Wise data

AU - Madore, Barry F.

AU - Hoffman, Douglas

AU - Freedman, Wendy L.

AU - Kollmeier, Juna A.

AU - Monson, Andy

AU - Eric Persson, S.

AU - Rich, Jeff A.

AU - Scowcroft, Victoria

AU - Seibert, Mark

PY - 2013/10/20

Y1 - 2013/10/20

N2 - 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 μm, respectively: 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 μm, 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.

AB - 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 μm, respectively: 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 μm, 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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ER -

A preliminary calibration of the RR Lyrae period-luminosity relation at mid-infrared wavelengths: Wise data

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