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On the triple peaks...
On the triple peaks of SNHunt248 in NGC 5806
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Kankare, E. (author)
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Kotak, R. (author)
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Pastorello, A. (author)
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Fraser, M. (author)
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Mattila, S. (author)
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Smartt, S. J. (author)
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Bruce, A. (author)
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Chambers, K. C. (author)
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Elias-Rosa, N. (author)
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Flewelling, H. (author)
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- Fremling, Christoffer (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Harmanen, J. (author)
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Huber, M. (author)
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Jerkstrand, A. (author)
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Kangas, T. (author)
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Kuncarayakti, H. (author)
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Magee, M. (author)
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Magnier, E. (author)
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Polshaw, J. (author)
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Smith, K. W. (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Tomasella, L. (author)
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(creator_code:org_t)
- 2015-09-07
- 2015
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 581
- Related links:
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https://pureadmin.qu...
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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
- We present our findings on a supernova (SN) impostor, SNHunt248, based on optical and near-IR data spanning similar to 15 yr before discovery, to similar to 1 yr post-discovery. The light curve displays three distinct peaks, the brightest of which is at MR similar to -15.0 mag. The post-discovery evolution is consistent with the ejecta from the outburst interacting with two distinct regions of circumstellar material. The 0.5-2.2 mu m spectral energy distribution at -740 d is well-matched by a single 6700 K blackbody with log(L/L-circle dot) similar to 6.1. This temperature and luminosity support previous suggestions of a yellow hypergiant progenitor; however, we find it to be brighter than the brightest and most massive Galactic late-F to early-G spectral type hypergiants. Overall the historical light curve displays variability of up to similar to +/- 1 mag. At current epochs (similar to 1 yr post-outburst), the absolute magnitude (MR similar to -9 mag) is just below the faintest observed historical absolute magnitude similar to 10 yr before discovery.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- stars: massive
- stars: mass-loss
- supernovae: general
- supernovae: individual: SNHunt248
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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Kankare, E.
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Kotak, R.
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Pastorello, A.
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Fraser, M.
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Mattila, S.
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Smartt, S. J.
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show more...
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Bruce, A.
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Chambers, K. C.
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Elias-Rosa, N.
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Flewelling, H.
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Fremling, Christ ...
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Harmanen, J.
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Huber, M.
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Jerkstrand, A.
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Kangas, T.
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Kuncarayakti, H.
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Magee, M.
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Magnier, E.
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Polshaw, J.
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Smith, K. W.
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Sollerman, Jespe ...
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Tomasella, L.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Stockholm University