2018/05/07 by Suhail Dhawan, S. Dhawan, A. Flörs +9 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Ejecta #Extinction (optical mineralogy) #Galaxy #Gamma-ray bursts and supernovae #Infrared #Infrared spectroscopy #Line (geometry) #Materials science #Near-infrared spectroscopy #Nickel #Optics #Physics #Redshift #Spectral line #Spectroscopy #Stellar, planetary, and galactic studies #Supernova #astro-ph.HE #astro-ph.SR
paper · pdf · doi:10.1051/0004-6361/201833274
published as A&A 619, A102 (2018) · 6 pages, 4 figures, submitted to A&A
arxiv created 2018/05/07 · openalex created_date 2018/05/17 · openalex publication_date 2018/10/01 · arxiv updated 2018/11/14 · openalex updated_date 2026/08/05
We present near-infrared (NIR) spectroscopy of the nearby supernova 2014J obtained ∼450 d after explosion. We detect the [Ni II ] 1.939 μ m line in the spectra indicating the presence of stable 58 Ni in the ejecta. The stable nickel is not centrally concentrated but rather distributed as the iron. The spectra are dominated by forbidden [Fe II ] and [Co II ] lines. We used lines, in the NIR spectra, arising from the same upper energy levels to place constraints on the extinction from host galaxy dust. We find that that our data are in agreement with the high A V and low R V found in earlier studies from data near maximum light. Using a 56 Ni mass prior from near maximum light γ -ray observations, we find 0.053 ± 0.018 M ⊙ of stable nickel to be present in the ejecta. We find that the iron group features are redshifted from the host galaxy rest frame by ∼600 km s −1 .