Search: (WFRF:(Gromadzki M.)) srt2:(2015-2019) >
SN 2017ens :
SN 2017ens : The Metamorphosis of a Luminous Broadlined Type Ic Supernova into an SN IIn
- Article/chapterEnglish2018
Publisher, publication year, extent ...
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2018-11-09
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American Astronomical Society,2018
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-162853
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-162853URI
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https://doi.org/10.3847/2041-8213/aaeb2eDOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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We present observations of supernova (SN) 2017ens, discovered by the ATLAS survey and identified as a hot blue object through the GREAT program. The redshift z = 0.1086 implies a peak brightness of M-g = -21.1 mag, placing the object within the regime of superluminous supernovae. We observe a dramatic spectral evolution, from initially being blue and featureless, to later developing features similar to those of the broadlined Type Ic SN 1998bw, and finally showing 2000 km s(-1) wide H alpha and H beta emission. Relatively narrow Balmer emission (reminiscent of a SN IIn) is present at all times. We also detect coronal lines, indicative of a dense circumstellar medium. We constrain the progenitor wind velocity to similar to 50-60 km s(-1) based on P-Cygni profiles, which is far slower than those present in Wolf-Rayet stars. This may suggest that the progenitor passed through a luminous blue variable phase, or that the wind is instead from a binary companion red supergiant star. At late times we see the similar to 2000 km s(-1) wide H alpha emission persisting at high luminosity (similar to 3 x 10(40) erg s(-1)) for at least 100 day, perhaps indicative of additional mass loss at high velocities that could have been ejected by a pulsational pair instability.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Inserra, C.
(author)
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Fraser, M.
(author)
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Moriya, T. J.
(author)
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Schady, P.
(author)
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Schweyer, T.
(author)
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Filippenko, A.
(author)
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Perley, D. A.
(author)
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Ruiter, A. J.
(author)
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Seitenzahl, I.
(author)
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Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle
(author)
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Taddia, FrancescoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ftadd
(author)
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Anderson, J. P.
(author)
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Foley, R. J.
(author)
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Jerkstrand, A.
(author)
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Ngeow, C.-C.
(author)
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Pan, Y.-C.
(author)
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Pastorello, A.
(author)
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Points, S.
(author)
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Smartt, S. J.
(author)
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Smith, K. W.
(author)
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Taubenberger, S.
(author)
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Wienlan, P.
(author)
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Young, D. R.
(author)
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Benetti, S.
(author)
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Berton, M.
(author)
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Bufano, F.
(author)
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Clark, P.
(author)
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Della Valle, M.
(author)
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Galbany, L.
(author)
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Gal-Yam, A.
(author)
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Gromadzki, M.
(author)
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Gutierrez, C. P.
(author)
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Heinze, A.
(author)
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Kankare, E.
(author)
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Kilpatrick, C. D.
(author)
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Kuncarayakti, H.
(author)
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Leloudas, G.
(author)
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Lin, Z.-Y.
(author)
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Maguire, K.
(author)
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Mazzali, P.
(author)
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McBrien, O.
(author)
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Prentice, S. J.
(author)
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Rau, A.
(author)
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Rest, A.
(author)
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Siebert, M. R.
(author)
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Stalder, B.
(author)
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Tonry, J. L.
(author)
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Yu, P.-C.
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
Related titles
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In:Astrophysical Journal Letters: American Astronomical Society867:22041-82052041-8213
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- By the author/editor
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Chen, T.-W.
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Inserra, C.
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Fraser, M.
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Moriya, T. J.
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Schady, P.
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Schweyer, T.
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show more...
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Filippenko, A.
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Perley, D. A.
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Ruiter, A. J.
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Seitenzahl, I.
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Sollerman, Jespe ...
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Taddia, Francesc ...
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Anderson, J. P.
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Foley, R. J.
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Jerkstrand, A.
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Ngeow, C.-C.
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Pan, Y.-C.
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Pastorello, A.
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Points, S.
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Smartt, S. J.
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Smith, K. W.
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Taubenberger, S.
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Wienlan, P.
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Young, D. R.
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Benetti, S.
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Berton, M.
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Bufano, F.
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Clark, P.
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Della Valle, M.
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Galbany, L.
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Gal-Yam, A.
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Gromadzki, M.
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Gutierrez, C. P.
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Heinze, A.
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Kankare, E.
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Kilpatrick, C. D ...
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Kuncarayakti, H.
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Leloudas, G.
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Lin, Z.-Y.
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Maguire, K.
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Mazzali, P.
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McBrien, O.
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Prentice, S. J.
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Rau, A.
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Rest, A.
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Siebert, M. R.
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Stalder, B.
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Tonry, J. L.
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Yu, P.-C.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Stockholm University