SN 2013aa and SN 2017cbv:Two Sibling Type Ia Supernovae in the Spiral Galaxy NGC 5643
| Autor: | Kevin Krisciunas, C. Gonzalez, Christopher R. Burns, Chris Ashall, Peter Hoeflich, Eric Hsiao, Nicholas B. Suntzeff, Joshua D. Simon, J. Vílchez, Maximilian Stritzinger, Jaime Vargas-González, S. Holmbo, Anthony L. Piro, David J. Sand, Syed Uddin, Mark M. Phillips, Charles D. Kilpatrick, Nahir Muñoz-Elgueta, Lluís Galbany, N. Ulloa, Ricardo Flores, Abdo Campillay, Peter J. Brown, Carlos Contreras, César Rojas-Bravo, Ryan J. Foley, Robert P. Kirshner, Nidia Morrell, Wendy L. Freedman |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010504 meteorology & atmospheric sciences
Cepheid variable Astrophysics::High Energy Astrophysical Phenomena Galaxy distances Photometric system FOS: Physical sciences Distance indicators Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences 0103 physical sciences Peculiar velocity Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics High Energy Astrophysical Phenomena (astro-ph.HE) Type Ia supernovae Spiral galaxy Cosmic distance ladder Interstellar dust extinction Astronomy and Astrophysics Light curve Astrophysics - Astrophysics of Galaxies Galaxy Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | Burns, C R, Ashall, C, Contreras, C, Brown, P, Stritzinger, M, Phillips, M M, Flores, R, Suntzeff, N B, Hsiao, E Y, Uddin, S, Simon, J D, Krisciunas, K, Campillay, A, Foley, R J, Freedman, W L, Galbany, L, González, C, Hoeflich, P, Holmbo, S, Kilpatrick, C D, Kirshner, R P, Morrell, N, Muñoz-Elgueta, N, Piro, A L, Rojas-Bravo, C, Sand, D, Vargas-González, J, Ulloa, N & Vilchez, J A 2020, ' SN 2013aa and SN 2017cbv : Two Sibling Type Ia Supernovae in the Spiral Galaxy NGC 5643 ', The Astrophysical Journal, vol. 895, no. 2, 118 . https://doi.org/10.3847/1538-4357/ab8e3e The Astrophysical Journal |
| DOI: | 10.3847/1538-4357/ab8e3e |
| Popis: | We present photometric and spectroscopic observations of SN 2013aa and SN 2017cbv, two nearly identical type Ia supernovae (SNe Ia) in the host galaxy NGC 5643. The optical photometry has been obtained using the same telescope and instruments used by the Carnegie Supernova Project. This eliminates most instrumental systematics and provides light curves in a stable and well-understood photometric system. Having the same host galaxy also eliminates systematics due to distance and peculiar velocity, providing an opportunity to directly test the relative precision of SNe Ia as standard candles. The two SNe have nearly identical decline rates, negligible reddening, and remarkably similar spectra and, at a distance of $\sim 20$ Mpc, are ideal as potential calibrators for the absolute distance using primary indicators such as Cepheid variables. We discuss to what extent these two SNe can be considered twins and compare them with other supernova "siblings" in the literature and their likely progenitor scenarios. Using 12 galaxies that hosted 2 or more SNe~Ia, we find that when using SNe~Ia, and after accounting for all sources of observational error, one gets consistency in distance to 3 percent. Accepted for publication in the Astrophysical Journal |
| Databáze: | OpenAIRE |
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