Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope
| Autor: | Brad E. Tucker, Lucas M. Macri, Wenlong Yuan, Jeffrey M. Silverman, Adam G. Riess, Ryan Chornock, Ryan J. Foley, Stefano Casertano, Ariel Goobar, Douglas L. Welch, Alexei V. Filippenko, Rahman Amanullah, Samantha L. Hoffmann |
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| Rok vydání: | 2016 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Cepheid variable FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Type (model theory) Space (mathematics) 01 natural sciences Hubble space telescope 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Physics 010308 nuclear & particles physics Equation of state (cosmology) Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Dark energy Astrophysics::Earth and Planetary Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.48550/arxiv.1607.08658 |
| Popis: | We present results of an optical search for Cepheid variable stars using the Hubble Space Telescope (HST) in 19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy NGC 4258, conducted as part of the SH0ES project (Supernovae and H0 for the Equation of State of dark energy). The targets include 9 newly imaged SN Ia hosts using a novel strategy based on a long-pass filter that minimizes the number of HST orbits required to detect and accurately determine Cepheid properties. We carried out a homogeneous reduction and analysis of all observations, including new universal variability searches in all SN Ia hosts, that yielded a total of 2200 variables with well-defined selection criteria -- the largest such sample identified outside the Local Group. These objects are used in a companion paper to determine the local value of H0 with a total uncertainty of 2.4%. Comment: ApJ, in press. v2 adds missing co-author to arXiv metadata and text in acknowledgments |
| Databáze: | OpenAIRE |
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