@article{64d348bddb3b4a59accfe40d4802b452,
title = "The late-time light curve of the Type Ia supernova SN 2011fe",
abstract = "We present late-time optical R-band imaging data from the Palomar Transient Factory (PTF) for the nearby Type Ia supernova SN 2011fe. The stacked PTF light curve provides densely sampled coverage down to R similar or equal to 22 mag over 200-620 d past explosion. Combining with literature data, we estimate the pseudo-bolometric light curve for this event from 200 to 1600 d after explosion, and constrain the likely near-infrared (Near-IR) contribution. This light curve shows a smooth decline consistent with radioactive decay, except over similar to 450 to similar to 600 d where the light curve appears to decrease faster than expected based on the radioactive isotopes presumed to be present, before flattening at around 600 d. We model the 200-1600 d pseudo-bolometric light curve with the luminosity generated by the radioactive decay chains of Ni-56, Ni-57 and Co-55, and find it is not consistent with models that have full positron trapping and no infrared catastrophe (IRC); some additional energy escape other than optical/near-IR photons is required. However, the light curve is consistent with models that allow for positron escape (reaching 75 per cent by day 500) and/or an IRC (with 85 per cent of the flux emerging in non-optical wavelengths by day 600). The presence of the Ni-57 decay chain is robustly detected, but the Co-55 decay chain is not formally required, with an upper mass limit estimated at 0.014M(circle dot). The measurement of the Ni-57/Ni-56 mass ratio is subject to significant systematic uncertainties, but all of our fits require a high ratio >0.031 (> 1.3 in solar abundances).",
author = "G. Dimitriadis and M. Sullivan and W. Kerzendorf and Ruiter, {A. J.} and Seitenzahl, {I. R.} and S. Taubenberger and Doran, {G. B.} and Avishay Gal-Yam and Laher, {R. R.} and K. Maguire and P. Nugent and Ofek, {E. O.} and J. Surace",
note = "EU/FP7-ERC grant [615929]; Weizmann-UK 'Making Connections' program; Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence 'Origin and Structure of the Universe'; ESO Telescopes at the La Silla Paranal Observatory [091.D-0764, 092.D-0632, 096.D-0627]; Association of Universities for Research in Astronomy, Inc., under NASA [NAS 5-26555]; [13737]; [14166]We acknowledge support from EU/FP7-ERC grant no. [615929] and the Weizmann-UK 'Making Connections' program. This research was supported by the Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence 'Origin and Structure of the Universe'. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.; This study is based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 091.D-0764, 092.D-0632 and 096.D-0627 and also based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Data Archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs #13737 and #14166. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. We acknowledge support from EU/FP7-ERC grant no. [615929] and the Weizmann-UK 'Making Connections' program. This research was supported by the Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence 'Origin and Structure of the Universe'. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.; This study is based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 091.D-0764, 092.D-0632 and 096.D-0627 and also based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the Data Archive at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs #13737 and #14166. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.",
year = "2017",
month = jul,
doi = "https://doi.org/10.1093/mnras/stx683",
language = "الإنجليزيّة",
volume = "468",
pages = "3798--3812",
journal = "MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",
}