期刊
ASTRONOMY & ASTROPHYSICS
卷 619, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201833274
关键词
supernovae: individual: SN 2014J; supernovae: general
资金
- TRR33 The Dark Universe of the German Research Foundation
- UK STFC through an Ernest Rutherford Fellowship
- STFC [ST/M005348/1] Funding Source: UKRI
We present near-infrared (NIR) spectroscopy of the nearby supernova 2014J obtained similar to 450 d after explosion. We detect the [Ni II] 1.939 mu m line in the spectra indicating the presence of stable Ni-58 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 Ni-56 mass prior from near maximum light gamma-ray observations, we find 0.053 +/- 0.018 M-circle dot 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 similar to 600 km s(-1).
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