The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST

Jeffrey A. Rich; Barry F. Madore; Andrew J. Monson; Wendy L. Freedman; Rachael L. Beaton; Gisella Clementini; Alessia Garofalo; Dylan Hatt; Taylor Hoyt; In Sung Jang; Juna A. Kollmeier; Myung Gyoon Lee; Jillian R. Neeley; Victoria Scowcroft; Mark Seibert

doi:10.3847/1538-4357/aae980

The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST

Jeffrey A. Rich, Barry F. Madore, Andrew J. Monson, Wendy L. Freedman, Rachael L. Beaton, Gisella Clementini, Alessia Garofalo, Dylan Hatt, Taylor Hoyt, In Sung Jang, Juna A. Kollmeier, Myung Gyoon Lee, Jillian R. Neeley, Victoria Scowcroft, Mark Seibert

Astronomy & Astrophysics

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Abstract

We present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of H _o at an accuracy of 3%. These data are taken with the same instrument and filter (F160W) as our observations of RR Lyrae stars in external galaxies so as to minimize sources of systematic error in our calibration of the extragalactic distance scale. We calculate mean magnitudes based on one to three measurements for each RR Lyrae star using star-by-star templates generated from densely time-sampled data at optical and midinfrared wavelengths. We use four RR Lyrae stars from our sample with well-measured HST parallaxes to determine a zero-point. This zero-point will soon be improved with the large number of precise parallaxes to be provided by Gaia. We also provide preliminary calibration with the TGAS and Gaia DR2 data, and all three zero points are in agreement, to within their uncertainties.

Original language	English (US)
Article number	82
Journal	Astrophysical Journal
Volume	869
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/aae980
State	Published - Dec 10 2018

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Rich, J. A., Madore, B. F., Monson, A. J., Freedman, W. L., Beaton, R. L., Clementini, G., Garofalo, A., Hatt, D., Hoyt, T., Jang, I. S., Kollmeier, J. A., Gyoon Lee, M., Neeley, J. R., Scowcroft, V., & Seibert, M. (2018). The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST. Astrophysical Journal, 869(1), Article 82. https://doi.org/10.3847/1538-4357/aae980

@article{22c1fa0279bc4ef18dfd89a285478d5b,

title = "The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST",

abstract = "We present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of H o at an accuracy of 3%. These data are taken with the same instrument and filter (F160W) as our observations of RR Lyrae stars in external galaxies so as to minimize sources of systematic error in our calibration of the extragalactic distance scale. We calculate mean magnitudes based on one to three measurements for each RR Lyrae star using star-by-star templates generated from densely time-sampled data at optical and midinfrared wavelengths. We use four RR Lyrae stars from our sample with well-measured HST parallaxes to determine a zero-point. This zero-point will soon be improved with the large number of precise parallaxes to be provided by Gaia. We also provide preliminary calibration with the TGAS and Gaia DR2 data, and all three zero points are in agreement, to within their uncertainties.",

author = "Rich, {Jeffrey A.} and Madore, {Barry F.} and Monson, {Andrew J.} and Freedman, {Wendy L.} and Beaton, {Rachael L.} and Gisella Clementini and Alessia Garofalo and Dylan Hatt and Taylor Hoyt and Jang, {In Sung} and Kollmeier, {Juna A.} and {Gyoon Lee}, Myung and Neeley, {Jillian R.} and Victoria Scowcroft and Mark Seibert",

year = "2018",

month = dec,

day = "10",

doi = "10.3847/1538-4357/aae980",

language = "English (US)",

volume = "869",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

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Rich, JA, Madore, BF, Monson, AJ, Freedman, WL, Beaton, RL, Clementini, G, Garofalo, A, Hatt, D, Hoyt, T, Jang, IS, Kollmeier, JA, Gyoon Lee, M, Neeley, JR, Scowcroft, V & Seibert, M 2018, 'The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST', Astrophysical Journal, vol. 869, no. 1, 82. https://doi.org/10.3847/1538-4357/aae980

TY - JOUR

T1 - The Carnegie-Chicago Hubble Program

T2 - Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST

AU - Rich, Jeffrey A.

AU - Madore, Barry F.

AU - Monson, Andrew J.

AU - Freedman, Wendy L.

AU - Beaton, Rachael L.

AU - Clementini, Gisella

AU - Garofalo, Alessia

AU - Hatt, Dylan

AU - Hoyt, Taylor

AU - Jang, In Sung

AU - Kollmeier, Juna A.

AU - Gyoon Lee, Myung

AU - Neeley, Jillian R.

AU - Scowcroft, Victoria

AU - Seibert, Mark

PY - 2018/12/10

Y1 - 2018/12/10

N2 - We present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of H o at an accuracy of 3%. These data are taken with the same instrument and filter (F160W) as our observations of RR Lyrae stars in external galaxies so as to minimize sources of systematic error in our calibration of the extragalactic distance scale. We calculate mean magnitudes based on one to three measurements for each RR Lyrae star using star-by-star templates generated from densely time-sampled data at optical and midinfrared wavelengths. We use four RR Lyrae stars from our sample with well-measured HST parallaxes to determine a zero-point. This zero-point will soon be improved with the large number of precise parallaxes to be provided by Gaia. We also provide preliminary calibration with the TGAS and Gaia DR2 data, and all three zero points are in agreement, to within their uncertainties.

AB - We present photometry of 30 Galactic RR Lyrae variables taken with HST WFC3/IR for the Carnegie-Chicago Hubble Program. These measurements form the base of the distance-ladder measurements that comprise a pure Population II base to a measurement of H o at an accuracy of 3%. These data are taken with the same instrument and filter (F160W) as our observations of RR Lyrae stars in external galaxies so as to minimize sources of systematic error in our calibration of the extragalactic distance scale. We calculate mean magnitudes based on one to three measurements for each RR Lyrae star using star-by-star templates generated from densely time-sampled data at optical and midinfrared wavelengths. We use four RR Lyrae stars from our sample with well-measured HST parallaxes to determine a zero-point. This zero-point will soon be improved with the large number of precise parallaxes to be provided by Gaia. We also provide preliminary calibration with the TGAS and Gaia DR2 data, and all three zero points are in agreement, to within their uncertainties.

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 82

ER -

The Carnegie-Chicago Hubble Program: Calibration of the Near-infrared RR Lyrae Period-Luminosity Relation with HST

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