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Goobar, A, Johansson, J, Schulze, S, Arendse, N, Carracedo, AS, Dhawan, S, Mörtsell, E, Fremling, C, Yan, L, Perley, D, Sollerman, J, Joseph, R, Hinds, KR, Meynardie, W, Andreoni, I, Bellm, E, Bloom, J, Collett, TE, Drake, A, Graham, M , Kasliwal, M, Kulkarni, SR, Lemon, C, Miller, AA, Neill, JD, Nordin, J, Pierel, J, Richard, J, Riddle, R, Rigault, M, Rusholme, B, Sharma, Y, Stein, R, Stewart, G, Townsend, A, Vinko, J, Wheeler, JC and Wold, A (2023) Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky. Nature Astronomy, 7 (9). pp. 1098-1107. ISSN 2397-3366
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Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky.pdf - Published Version Available under License Creative Commons Attribution. Download (2MB) | Preview |
Abstract
Detecting gravitationally lensed supernovae is among the biggest challenges in astronomy. It involves a combination of two very rare phenomena: catching the transient signal of a stellar explosion in a distant galaxy and observing it through a nearly perfectly aligned foreground galaxy that deflects light towards the observer. Here we describe how high-cadence optical observations with the Zwicky Transient Facility, with its unparalleled large field of view, led to the detection of a multiply imaged type Ia supernova, SN Zwicky, also known as SN 2022qmx. Magnified nearly 25-fold, the system was found thanks to the standard candle nature of type Ia supernovae. High-spatial-resolution imaging with the Keck telescope resolved four images of the supernova with very small angular separation, corresponding to an Einstein radius of only θ E = 0.167″ and almost identical arrival times. The small θ E and faintness of the lensing galaxy are very unusual, highlighting the importance of supernovae to fully characterize the properties of galaxy-scale gravitational lenses, including the impact of galaxy substructures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Cosmology; General relativity and gravity; Time-domain astronomy |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Nature Publishing Group |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 03 Jan 2024 16:07 |
| Last Modified: | 03 Jan 2024 16:07 |
| DOI or ID number: | 10.1038/s41550-023-01981-3 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/22159 |
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