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SN 2016coi/ASASSN-1...
SN 2016coi/ASASSN-16fp : an example of residual helium in a type Ic supernova?
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Prentice, S. J. (author)
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Ashall, C. (author)
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Mazzali, P. A. (author)
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show more...
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Zhang, J. -J. (author)
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James, P. A. (author)
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Wang, X. -F. (author)
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Vinko, J. (author)
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Percival, S. (author)
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Short, L. (author)
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Piascik, A. (author)
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Huang, F. (author)
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Mo, J. (author)
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Rui, L. -M. (author)
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Wang, J. -G. (author)
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Xiang, D. -F. (author)
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Xin, Y. -X. (author)
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Yi, W. -M. (author)
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Yu, X. -G. (author)
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Zhai, Q. (author)
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Zhang, T. -M. (author)
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Hosseinzadeh, G. (author)
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Howell, D. A. (author)
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McCully, C. (author)
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Valenti, S. (author)
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Cseh, B. (author)
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Hanyecz, O. (author)
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Kriskovics, L. (author)
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Pal, A. (author)
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Sarneczky, K. (author)
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Sodor, A. (author)
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Szakats, R. (author)
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Szekely, P. (author)
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Varga-Verebelyi, E. (author)
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Vida, K. (author)
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Bradac, M. (author)
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Reichart, D. E. (author)
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Sand, D. (author)
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- Tartaglia, Leonardo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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(creator_code:org_t)
- 2018-05-11
- 2018
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 478:3, s. 4162-4192
- Related links:
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https://researchonli...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- The optical observations of Ic-4 supernova (SN) 2016coi/ASASSN-16fp, from similar to 2 to similar to 450 d after explosion, are presented along with analysis of its physical properties. The SN shows the broad lines associated with SNe Ic-3/4 but with a key difference. The early spectra display a strong absorption feature at similar to 5400 angstrom which is not seen in other SNe Ic-3/4 at this epoch. This feature has been attributed to He I in the literature. Spectral modelling of the SN in the early photospheric phase suggests the presence of residual He in a C/O dominated shell. However, the behaviour of the He I lines is unusual when compared with He-rich SNe, showing relatively low velocities and weakening rather than strengthening over time. The SN is found to rise to peak similar to 16 d after core-collapse reaching a bolometric luminosity of L-p similar to 3 x 10(42) erg s(-1). Spectral models, including the nebular epoch, show that the SN ejected 2.5-4M(circle dot) of material, with similar to 1.5M(circle dot) below 5000 km s(-1), and with a kinetic energy of (4.5-7) x 10(51) erg. The explosion synthesized similar to 0.14M(circle dot) of Ni-56. There are significant uncertainties in E(B - V)(host) and the distance, however, which will affect L-p and M-Ni. SN 2016coi exploded in a host similar to the Large Magellanic Cloud (LMC) and away from star-forming regions. The properties of the SN and the host-galaxy suggest that the progenitor had M-ZAMS of 23-28M(circle dot) and was stripped almost entirely down to its C/O core at explosion.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- supernovae: individual
- SN2016coi/ASASSN16-fp
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Prentice, S. J.
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Ashall, C.
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Mazzali, P. A.
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Zhang, J. -J.
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James, P. A.
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Wang, X. -F.
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show more...
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Vinko, J.
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Percival, S.
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Short, L.
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Piascik, A.
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Huang, F.
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Mo, J.
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Rui, L. -M.
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Wang, J. -G.
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Xiang, D. -F.
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Xin, Y. -X.
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Yi, W. -M.
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Yu, X. -G.
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Zhai, Q.
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Zhang, T. -M.
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Hosseinzadeh, G.
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Howell, D. A.
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McCully, C.
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Valenti, S.
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Cseh, B.
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Hanyecz, O.
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Kriskovics, L.
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Pal, A.
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Sarneczky, K.
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Sodor, A.
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Szakats, R.
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Szekely, P.
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Varga-Verebelyi, ...
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Vida, K.
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Bradac, M.
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Reichart, D. E.
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Sand, D.
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Tartaglia, Leona ...
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