Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published January 20, 2015 | Published + Submitted
Journal Article Open

Constraints on the origin of the first light from SN 2014J


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

Additional Information

© 2015 The American Astronomical Society. Received 2014 October 8; accepted 2014 November 14; published 2015 January 20. A.G. and R.A. acknowledge support from the Swedish Research Council and the Swedish Space Board.

Attached Files

Submitted - 1410.1363v2.pdf

Published - Goobar_2015_ApJ_799_106.pdf


Files (971.7 kB)
Name Size Download all
537.5 kB Preview Download
434.2 kB Preview Download

Additional details

August 20, 2023
August 20, 2023