Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/25079
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | BENETTI, Stefano | en_US |
dc.contributor.author | Chugai, N. N. | en_US |
dc.contributor.author | Utrobin, V. P. | en_US |
dc.contributor.author | CAPPELLARO, Enrico | en_US |
dc.contributor.author | Patat, F. | en_US |
dc.contributor.author | PASTORELLO, Andrea | en_US |
dc.contributor.author | TURATTO, Massimo | en_US |
dc.contributor.author | CUPANI, Guido | en_US |
dc.contributor.author | Neuhäuser, R. | en_US |
dc.contributor.author | Caldwell, N. | en_US |
dc.contributor.author | Pignata, G. | en_US |
dc.contributor.author | TOMASELLA, Lina | en_US |
dc.date.accessioned | 2020-05-22T10:23:17Z | - |
dc.date.available | 2020-05-22T10:23:17Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25079 | - |
dc.description.abstract | Spectrophotometry of SN 1996al carried out throughout 15 yr is presented. The early photometry suggests that SN 1996al is a linear Type II supernova, with an absolute peak of M<SUB>V</SUB> ∼ -18.2 mag. Early spectra present broad asymmetric Balmer emissions, with superimposed narrow lines with P-Cygni profile, and He I features with asymmetric broad emission components. The analysis of the line profiles shows that the H and He broad components form in the same region of the ejecta. By day +142, the Hα profile dramatically changes: the narrow P-Cygni profile disappears, and the Hα is fitted by three emission components that will be detected over the remaining 15 yr of the supernova (SN) monitoring campaign. Instead, the He I emissions become progressively narrower and symmetric. A sudden increase in flux of all He I lines is observed between 300 and 600 d. Models show that the SN luminosity is sustained by the interaction of low-mass (∼1.15 M<SUB>☉</SUB>) ejecta, expelled in a low kinetic energy (∼1.6 × 10<SUP>50</SUP> erg) explosion, with highly asymmetric circumstellar medium. The detection of Hα emission in pre-explosion archive images suggests that the progenitor was most likely a massive star (∼25 M<SUB>☉</SUB> ZAMS) that had lost a large fraction of its hydrogen envelope before explosion, and was hence embedded in a H-rich cocoon. The low-mass ejecta and modest kinetic energy of the explosion are explained with massive fallback of material into the compact remnant, a 7-8-M<SUB>☉</SUB> black hole. | en_US |
dc.language.iso | eng | en_US |
dc.title | The spectacular evolution of Supernova 1996al over 15 yr: a low-energy explosion of a stripped massive star in a highly structured environment | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv2811 | en_US |
dc.identifier.scopus | 2-s2.0-84963832420 | en_US |
dc.identifier.isi | 000372265200077 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/456/3/3296/1094385 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 456 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3296 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.456.3296B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0002-3256-0016 | - |
crisitem.author.orcid | 0000-0001-5008-8619 | - |
crisitem.author.orcid | 0000-0002-7259-4624 | - |
crisitem.author.orcid | 0000-0002-9719-3157 | - |
crisitem.author.orcid | 0000-0002-6830-9093 | - |
crisitem.author.orcid | 0000-0002-3697-2616 | - |
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