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  • Zhang, Kaicheng (author)

SN 2014J in M82 : new insights on the spectral diversity of Type Ia supernovae

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018-08-23
  • Oxford University Press (OUP),2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-162991
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-162991URI
  • https://doi.org/10.1093/mnras/sty2289DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • We present extensive spectroscopic observations for one of the closest Type Ia supernovae (SNe Ia), SN 2014J discovered in M82, ranging from 10.4 d before to 473.2 d after B-band maximum light. The diffuse interstellar band features detected in a high-resolution spectrum allow an estimate of line-of-sight extinction as A(v) similar to 1.9 +/- 0.6 mag. Spectroscopically, SN 2014J can be put into the high-velocity (HV) subgroup in Wang's classification with a velocity of Si II lambda 6355 at maximum light of upsilon(0) = 1.22 +/- 0.01 x 10(4) km s(-1) but has a low velocity gradient (LVG, following Benetti's classification) of (v) over bar = 41 +/- 2 km s(-1) d(-1), which is inconsistent with the trend that HV SNe Ia generally have larger velocity gradients. We find that the HV SNe Ia with LVGs tend to have relatively stronger Si III (at similar to 4400 angstrom) absorptions in early spectra, larger ratios of S II lambda 5468 to S II lambda 5640, and weaker Si II 5972 absorptions compared to their counterparts with similar velocities but high velocity gradients. This shows that the HV+ LVG subgroup of SNe Ia may have intrinsically higher photospheric temperature, which indicates that their progenitors may experience more complete burning in the explosions relative to the typical HV SNe Ia.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Wang, Xiaofeng (author)
  • Zhang, Jujia (author)
  • Zhang, Tianmeng (author)
  • Benetti, S. (author)
  • Elias-Rosa, N. (author)
  • Huang, Fang (author)
  • Lin, Han (author)
  • Li, Linyi (author)
  • Li, Wenxiong (author)
  • Ochner, P. (author)
  • Pastorello, A. (author)
  • Rui, Liming (author)
  • Tartaglia, LeonardoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)leta1160 (author)
  • Tomasella, L. (author)
  • Siviero, A. (author)
  • Munari, U. (author)
  • Terreran, G. (author)
  • Song, Hao (author)
  • Taubenberger, S. (author)
  • Wheeler, J. Craig (author)
  • Xiang, Danfeng (author)
  • Zhao, Xulin (author)
  • Li, Hongbin (author)
  • Bai, Jinming (author)
  • Jiang, Xiaojun (author)
  • Shi, Jianrong (author)
  • Wu, Zhenyu (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)481:1, s. 878-8930035-87111365-2966

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