Empirical 2MASS–WFC3/IR Filter Transformations Across the H-R Diagram from Synthetic Photometry

M. J. Durbin; R. L. Beaton; A. J. Monson; B. Swidler; J. J. Dalcanton

doi:10.3847/1538-3881/acfaa1

The Astronomical Journal (Jan 2023)

Empirical 2MASS–WFC3/IR Filter Transformations Across the H-R Diagram from Synthetic Photometry

M. J. Durbin,
R. L. Beaton,
A. J. Monson,
B. Swidler,
J. J. Dalcanton

Affiliations

M. J. Durbin: ORCiD; Department of Astronomy, University of California, Berkeley , Berkeley, CA 94720, USA ; [email protected]; Department of Astronomy, University of Washington , Box 351580, U.W., Seattle, WA 98195-1580, USA
R. L. Beaton: ORCiD; Space Telescope Science Institute , Baltimore, MD 21218, USA; Department of Physics and Astronomy, Johns Hopkins University , Baltimore, MD 21218, USA; Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA; The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
A. J. Monson: ORCiD; Department of Astronomy & Astrophysics, The Pennsylvania State University , 525 Davey Lab, University Park, PA 16802, USA; Department of Astronomy/Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721, USA
B. Swidler: ORCiD; Department of Astrophysical Sciences, Princeton University , 4 Ivy Lane, Princeton, NJ 08544, USA
J. J. Dalcanton: ORCiD; Department of Astronomy, University of Washington , Box 351580, U.W., Seattle, WA 98195-1580, USA; Center for Computational Astrophysics , Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA

DOI: https://doi.org/10.3847/1538-3881/acfaa1
Journal volume & issue: Vol. 166, no. 6
p. 236

Abstract

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Near-infrared bandpasses on spaceborne observatories diverge from their ground-based counterparts as they are free of atmospheric telluric absorption. Available transformations between respective filter systems in the literature rely on theoretical stellar atmospheres, which are known to have difficulties reproducing the observed spectral energy distributions of cool giants. We present new transformations between the Two Micron All Sky Survey JHK _S and Hubble Space Telescope WFC3/IR F110W, F125W, and F160W photometric systems based on synthetic photometry of empirical stellar spectra from four spectral libraries. This sample comprises over 1000 individual stars, which together span nearly the full H-R diagram and sample stellar populations from the solar neighborhood out to the Magellanic Clouds, covering a broad range of ages, metallicities, and other relevant stellar properties. In addition to global color-dependent transformations, we examine band-to-band differences for cool, luminous giant stars in particular, including multiple types of primary distance indicators.

Published in The Astronomical Journal

ISSN: 0004-6256 (Print); 1538-3881 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy
Website: https://iopscience.iop.org/journal/1538-3881

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