Observations of Type Ia Supernova 2014J for Nearly 900 Days and Constraints on Its Progenitor System Academic Article uri icon


  • 2019. The American Astronomical Society. All rights reserved. We present extensive ground-based and Hubble Space Telescope (HST) photometry of the highly reddened, very nearby SN Ia 2014J in M82, covering the phases from 9 days before to about 900 days after the B-band maximum. SN 2014J is similar to other normal SNe Ia near the maximum light, but it shows flux excess in the B band in the early nebular phase. This excess flux emission can be due to light scattering by some structures of circumstellar materials located at a few 1017 cm, consistent with a single-degenerate progenitor system or a double-degenerate progenitor system with mass outflows in the final evolution or magnetically driven winds around the binary system. At t +300 to +500 days past the B-band maximum, the light curve of SN 2014J shows a faster decline relative to the 56Ni decay. That feature can be attributed to the significant weakening of the emission features around [Fe iii] 4700 and [Fe ii] 5200 rather than the positron escape, as previously suggested. Analysis of the HST images taken at t > 600 days confirms that the luminosity of SN 2014J maintains a flat evolution at the very late phase. Fitting the late-time pseudobolometric light curve with radioactive decay of 56Ni, 57Ni, and 55Fe isotopes, we obtain the mass ratio 57Ni/56Ni as 0.035 0.011, which is consistent with the corresponding value predicted from the 2D and 3D delayed-detonation models. Combined with early-time analysis, we propose that delayed-detonation through the single-degenerate scenario is most likely favored for SN 2014J.

published proceedings

  • The Astrophysical Journal

altmetric score

  • 5.08

author list (cited authors)

  • Li, W., Wang, X., Hu, M., Yang, Y. i., Zhang, J., Mo, J., ... Wang, L.

citation count

  • 11

complete list of authors

  • Li, Wenxiong||Wang, Xiaofeng||Hu, Maokai||Yang, Yi||Zhang, Jujia||Mo, Jun||Chen, Zhihao||Zhang, Tianmeng||Benetti, Stefano||Cappellaro, Enrico||Elias-Rosa, Nancy||Isern, Jordi||Morales-Garoffolo, Antonia||Huang, Fang||Ochner, Paolo||Pastorello, Andrea||Reguitti, Andrea||Tartaglia, Leonardo||Terreran, Giacomo||Tomasella, Lina||Wang, Lifan

publication date

  • August 2019