Article: 56Ni mixing in the outer layers of SN 1987A

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Title56Ni mixing in the outer layers of SN 1987A
AuthorsMitchell, RC3
Baron, E3
Branch, D3
Lundqvist, P1
Blinnikov, S5
Hauschildt, PH2
Pun, CSJ4
KeywordsLine: Formation
Nuclear Reactions, Nucleosynthesis, Abundances
Radiative Transfer
Supernovae: Individual (Sn 1987A)
Issue Date2001
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
CitationAstrophysical Journal Letters, 2001, v. 556 n. 2 PART 1, p. 979-986 [How to Cite?]
DOI: http://dx.doi.org/10.1086/321623
AbstractSupernova 1987A remains the most well observed and well studied supernova to date. Observations have produced excellent broadband photometric and spectroscopic coverage over a wide wavelength range at all epochs. Here we focus on the very early spectroscopic observations. Only recently have numerical models been of sufficient detail to accurately explain the observed spectra. In SN 1987A, good agreement has been found between observed and synthetic spectra for day 1, but by day 4, the predicted Balmer lines become much weaker than the observed lines. We present the results of work based on a radiation-hydrodynamic model by Blinnikov and collaborators. Synthetic non-LTE spectra generated from this model by the general radiation transfer code PHOENIX strongly support the theory that significant mixing of 56Ni into the outer envelope is required to maintain strong Balmer lines. Preliminary results suggest a lower limit to the average nickel mass of 1.0 x 10 -5 M ⊙ is required above 5000 km s -1 by day 4. PHOENIX models thus have the potential to be a sensitive probe for nickel mixing in the outer layers of a supernova.
ISSN2041-8205
2011 Impact Factor: 5.526
DOIhttp://dx.doi.org/10.1086/321623
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorMitchell, RC
dc.contributor.authorBaron, E
dc.contributor.authorBranch, D
dc.contributor.authorLundqvist, P
dc.contributor.authorBlinnikov, S
dc.contributor.authorHauschildt, PH
dc.contributor.authorPun, CSJ
dc.date.accessioned2012-11-26T08:47:33Z
dc.date.available2012-11-26T08:47:33Z
dc.date.issued2001
dc.description.abstractSupernova 1987A remains the most well observed and well studied supernova to date. Observations have produced excellent broadband photometric and spectroscopic coverage over a wide wavelength range at all epochs. Here we focus on the very early spectroscopic observations. Only recently have numerical models been of sufficient detail to accurately explain the observed spectra. In SN 1987A, good agreement has been found between observed and synthetic spectra for day 1, but by day 4, the predicted Balmer lines become much weaker than the observed lines. We present the results of work based on a radiation-hydrodynamic model by Blinnikov and collaborators. Synthetic non-LTE spectra generated from this model by the general radiation transfer code PHOENIX strongly support the theory that significant mixing of 56Ni into the outer envelope is required to maintain strong Balmer lines. Preliminary results suggest a lower limit to the average nickel mass of 1.0 x 10 -5 M ⊙ is required above 5000 km s -1 by day 4. PHOENIX models thus have the potential to be a sensitive probe for nickel mixing in the outer layers of a supernova.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationAstrophysical Journal Letters, 2001, v. 556 n. 2 PART 1, p. 979-986 [How to Cite?]
DOI: http://dx.doi.org/10.1086/321623
dc.identifier.doihttp://dx.doi.org/10.1086/321623
dc.identifier.epage986
dc.identifier.issn2041-8205
2011 Impact Factor: 5.526
dc.identifier.issue2 PART 1
dc.identifier.scopuseid_2-s2.0-0035429717
dc.identifier.spage979
dc.identifier.urihttp://hdl.handle.net/10722/174807
dc.identifier.volume556
dc.languageeng
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
dc.publisher.placeUnited Kingdom
dc.relation.ispartofAstrophysical Journal Letters
dc.relation.referencesReferences in Scopus
dc.subjectLine: Formation
dc.subjectNuclear Reactions, Nucleosynthesis, Abundances
dc.subjectRadiative Transfer
dc.subjectSupernovae: Individual (Sn 1987A)
dc.title56Ni mixing in the outer layers of SN 1987A
dc.typeArticle
Author Affiliations
  1. Stockholm Observatory
  2. The University of Georgia
  3. University of Oklahoma
  4. NASA Goddard Space Flight Center
  5. Alikhanov Institute for Theoretical and Experimental Physics