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THE TYPE IIb SUPERN...
THE TYPE IIb SUPERNOVA 2011dh FROM A SUPERGIANT PROGENITOR
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Bersten, Melina C. (author)
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Benvenuto, Omar G. (author)
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Nomoto, Ken'ichi (author)
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- Ergon, Mattias (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Folatelli, Gaston (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Benetti, Stefano (author)
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Botticella, Maria Teresa (author)
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Fraser, Morgan (author)
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Kotak, Rubina (author)
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Maeda, Keiichi (author)
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Ochner, Paolo (author)
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Tomasella, Lina (author)
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(creator_code:org_t)
- 2012
- 2012
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 757:1
- Related links:
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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
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- A set of hydrodynamical models based on stellar evolutionary progenitors is used to study the nature of SN 2011dh. Our modeling suggests that a large progenitor star-with R similar to 200 R-circle dot-is needed to reproduce the early light curve (LC) of SN 2011dh. This is consistent with the suggestion that the yellow super-giant star detected at the location of the supernova (SN) in deep pre-explosion images is the progenitor star. From the main peak of the bolometric LC and expansion velocities, we constrain the mass of the ejecta to be approximate to 2 M-circle dot, the explosion energy to be E = (6-10) x 10(50) erg, and the Ni-56 mass to be approximately 0.06 M-circle dot. The progenitor star was composed of a helium core of 3-4 M-circle dot and a thin hydrogen-rich envelope of approximate to 0.1M(circle dot) with a main-sequence mass estimated to be in the range of 12-15 M-circle dot. Our models rule out progenitors with helium-core masses larger than 8 M-circle dot, which correspond to M-ZAMS greater than or similar to 25M(circle dot). This suggests that a single star evolutionary scenario for SN 2011dh is unlikely.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- hydrodynamics
- supernovae: general
- supernovae: individual (SN 2011dh)
- Astronomy
- astronomi
Publication and Content Type
- ref (subject category)
- art (subject category)
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Bersten, Melina ...
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Benvenuto, Omar ...
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Nomoto, Ken'ichi
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Ergon, Mattias
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Folatelli, Gasto ...
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Sollerman, Jespe ...
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show more...
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Benetti, Stefano
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Botticella, Mari ...
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Fraser, Morgan
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Kotak, Rubina
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Maeda, Keiichi
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Ochner, Paolo
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Tomasella, Lina
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astrophysical Jo ...
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Stockholm University