Details

Autor(en) / Beteiligte

• 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

Titel

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

Ist Teil von

• The Astrophysical journal, 2019-09, Vol.882 (1), p.30

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• 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] λ4700 and [Fe ii] λ5200 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.