Zwicky Transient Facility and Globular Clusters: The gr-band Period–Luminosity Relations for Mira Variables at Maximum Light and their Applications to Local Galaxies
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1.
National Central University
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2.
Astronomical Observatory of Capodimonte
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3.
California Institute of Technology
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4.
Infrared Processing and Analysis Center
Abstract
Based on 14 Miras located in seven globular clusters, we derived the first gr-band period–luminosity (PL) at maximum light for the large-amplitude Mira variables using the multiyear light-curve data collected from the Zwicky Transient Facility (ZTF). Since Miras are red variables, we applied a color-term correction to subsets of ZTF light curves, and found that such corrections do not have a large impact on period determinations. We applied our derived PL relations to the known extragalactic Miras in five local galaxies (Sextans, Leo I, Leo II, NGC 6822 and IC 1613), and determined their Mira-based distances. We demonstrated that our PL relations can be applied to short-period (≲300 days) Miras, including those in the two most distant galaxies (NGC 6822 and IC 1613) in our sample even when only a portion of the light curves around maximum light have detections. We have also shown that the long-period extragalactic Miras do not follow the PL relations extrapolated to longer periods. Hence, our derived PL relations are only applicable to the short-period Miras, which will be discovered in abundance in local galaxies within the era of Vera C. Rubin Observatory's Legacy Survey of Space and Time.
Copyright and License
© 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Acknowledgement
We are thankful for funding from the National Science and Technology Council (Taiwan) under the contracts 107-2119-M-008-014-MY2, 107-2119-M-008-012, 108-2628-M-007-005-RSP, and 109-2112-M-008-014-MY3.
Based on observations obtained with the Samuel Oschin Telescope 48 inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under grant No. AST-1440341 and AST-2034437, and a collaboration including current partners Caltech, IPAC, the Weizmann Institute of Science, the Oskar Klein Center at Stockholm University, the University of Maryland, Deutsches Elektronen-Synchrotron and Humboldt University, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore National Laboratories, IN2P3, University of Warwick, Ruhr University Bochum, Northwestern University and former partners the University of Washington, Los Alamos National Laboratories, and Lawrence Berkeley National Laboratories. Operations are conducted by COO, IPAC, and UW.
This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.
This research has made use of the SIMBAD database and the VizieR catalog access tool, operated at CDS, Strasbourg, France. This research made use of Astropy, 10 a community-developed core Python package for Astronomy (Astropy Collaboration et al. 2013, 2018, 2022).
Facilities
PO:1.2m - Palomar Observatory's 1.2 meter Samuel Oschin Telescope.
Software References
astropy (Astropy Collaboration et al. 2013,2018, 2022), dustmaps (Green 2018), gatspy (VanderPlas & Ivezić 2015), Matplotlib (Hunter 2007), NumPy (Harris et al. 2020), SciPy (Virtanen et al. 2020), statsmodels (Seabold & Perktold 2010).
Files
Ngeow_2023_AJ_166_96.pdf
Additional details
Related works
- Is new version of
- Discussion Paper: arXiv:2307.06749 (arXiv)
Funding
- National Science and Technology Council
- 107-2119-M-008-014-MY2
- National Science and Technology Council
- 107-2119-M-008-012
- National Science and Technology Council
- 108-2628-M-007-005-RSP
- National Science and Technology Council
- 109-2112-M-008-014-MY3
- National Science Foundation
- AST-1440341
- National Science Foundation
- AST-2034437
Dates
- Available
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2023-08-08Published
Caltech Custom Metadata
- Caltech groups
- Infrared Processing and Analysis Center (IPAC) , Palomar Observatory , Zwicky Transient Facility , Division of Physics, Mathematics and Astronomy (PMA)
- Publication Status
- Published