1. A gravitationally lensed supernova with an observable two-decade time delay
- Author
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Sune Toft, Kyle O'Connor, Mohammad Akhshik, Steven A. Rodney, J. D. R. Pierel, Katherine E. Whitaker, Johan Richard, Gabriel B. Brammer, Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,RESOLVING QUIESCENT GALAXIES ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,DUST ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,MASS ,Metric expansion of space ,SEARCH ,Astrophysics::Galaxy Astrophysics ,Physics ,IA SUPERNOVAE ,MAGNIFICATION ,Astronomy and Astrophysics ,Quasar ,PARAMETER ,Light curve ,Redshift ,Galaxy ,Supernova ,Gravitational lens ,[SDU]Sciences of the Universe [physics] ,Dark energy ,CLUSTERS ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
When the light from a distant object passes very near to a foreground galaxy or cluster, gravitational lensing can cause it to appear as multiple images on the sky. If the source is variable, it can be used to constrain the cosmic expansion rate and dark energy models. Achieving these cosmological goals requires many lensed transients with precise time delay measurements. Lensed supernovae (SN) are attractive for this purpose because they have relatively simple photometric behavior, with well-understood light curve shapes and colours $-$ in contrast to the stochastic variation of quasars. Here we report the discovery of a multiply-imaged supernova, AT2016jka ("SN Requiem"). It appeared in an evolved galaxy at $z=1.95$, gravitationally lensed by a foreground galaxy cluster. It is likely a Type Ia supernova $-$ the explosion of a low-mass stellar remnant, whose light curve can be used to measure cosmic distances. In archival Hubble Space Telescope imaging, three lensed images of the supernova are detected with relative time delays of $, Comment: Accepted for publication in a peer-reviewed journal. Main text = 6 pages, 3 figures, 1 table; Full document = 28 pages, 12 figures with Methods, Supplemental Info and references. v2: reformatted; minor corrections in SI
- Published
- 2021