Constraints on the Origin of the First Light from SN 2014J
作者： K. G. Stassun , K. G. Stassun , M. Kasliwal , Francesco Taddia , Ariel Goobar
DOI: 10.1088/0004-637X/799/1/106
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摘要: We study the very early light curve of supernova 2014J (SN 2014J) using high-cadence broad-band imaging data obtained by Kilodegree Extremely Little Telescope, which fortuitously observed M 82 around time explosion, starting more than 2 months prior to detection, with up 20 observations per night. These are complemented in two narrow-band filters used an Hα survey nearby galaxies intermediate Palomar Transient Factory that also captured first days brightening supernova. The evolution curves is consistent expected signal from cooling shock heated material large scale dimensions, ≳1 R☉. This could be due progenitor, a companion star or pre-existing circumstellar environment, e.g., form accretion disk. Structure seen during after explosion originate radioactive outer parts exploding white dwarf, as suggested detection gamma-rays. model degeneracy translates into systematic uncertainty ±0.3 on estimate SN 2014J.
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