A gravitationally lensed supernova with an observable two-decade time delay
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A gravitationally lensed supernova with an observable two-decade time delay. / Rodney, Steven A.; Brammer, Gabriel B.; Pierel, Justin D. R.; Richard, Johan; Toft, Sune; O'Connor, Kyle F.; Akhshik, Mohammad; Whitaker, Katherine E.
I: Nature Astronomy, Bind 5, 13.09.2021, s. 1118-1125.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - A gravitationally lensed supernova with an observable two-decade time delay
AU - Rodney, Steven A.
AU - Brammer, Gabriel B.
AU - Pierel, Justin D. R.
AU - Richard, Johan
AU - Toft, Sune
AU - O'Connor, Kyle F.
AU - Akhshik, Mohammad
AU - Whitaker, Katherine E.
PY - 2021/9/13
Y1 - 2021/9/13
N2 - 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(1). If the source is variable, it can be used to constrain the cosmic expansion rate(2) and dark energy models(3). Achieving these cosmological goals requires many lensed transients with precise time-delay measurements(4). Lensed supernovae are attractive for this purpose because they have relatively simple photometric behaviour, 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, AT 2016jka ('SN Requiem'). It appeared in an evolved galaxy at redshift 1.95, gravitationally lensed by a foreground galaxy cluster(5). It is probably 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
AB - 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(1). If the source is variable, it can be used to constrain the cosmic expansion rate(2) and dark energy models(3). Achieving these cosmological goals requires many lensed transients with precise time-delay measurements(4). Lensed supernovae are attractive for this purpose because they have relatively simple photometric behaviour, 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, AT 2016jka ('SN Requiem'). It appeared in an evolved galaxy at redshift 1.95, gravitationally lensed by a foreground galaxy cluster(5). It is probably 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
KW - RESOLVING QUIESCENT GALAXIES
KW - IA SUPERNOVAE
KW - CLUSTERS
KW - MAGNIFICATION
KW - PARAMETER
KW - SEARCH
KW - DUST
KW - MASS
U2 - 10.1038/s41550-021-01450-9
DO - 10.1038/s41550-021-01450-9
M3 - Journal article
VL - 5
SP - 1118
EP - 1125
JO - Nature Astronomy
JF - Nature Astronomy
SN - 2397-3366
ER -
ID: 280231928