Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27507
DC Field | Value | Language |
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dc.contributor.author | Cai, Y. -Z. | en_US |
dc.contributor.author | PASTORELLO, Andrea | en_US |
dc.contributor.author | Fraser, M. | en_US |
dc.contributor.author | BOTTICELLA, MARIA TERESA | en_US |
dc.contributor.author | Gall, C. | en_US |
dc.contributor.author | Arcavi, I. | en_US |
dc.contributor.author | BENETTI, Stefano | en_US |
dc.contributor.author | CAPPELLARO, Enrico | en_US |
dc.contributor.author | ELIAS DE LA ROSA, NANCY DEL CARMEN | en_US |
dc.contributor.author | Harmanen, J. | en_US |
dc.contributor.author | Hosseinzadeh, G. | en_US |
dc.contributor.author | Howell, D. A. | en_US |
dc.contributor.author | Isern, J. | en_US |
dc.contributor.author | Kangas, T. | en_US |
dc.contributor.author | Kankare, E. | en_US |
dc.contributor.author | Kuncarayakti, H. | en_US |
dc.contributor.author | Lundqvist, P. | en_US |
dc.contributor.author | Mattila, S. | en_US |
dc.contributor.author | McCully, C. | en_US |
dc.contributor.author | Reynolds, T. M. | en_US |
dc.contributor.author | Somero, A. | en_US |
dc.contributor.author | Stritzinger, M. D. | en_US |
dc.contributor.author | Terreran, G. | en_US |
dc.date.accessioned | 2020-09-29T07:53:10Z | - |
dc.date.available | 2020-09-29T07:53:10Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27507 | - |
dc.description.abstract | We report the results of our spectrophotometric monitoring campaign for AT 2017be in NGC 2537. Its light curve reveals a fast rise to an optical maximum, followed by a plateau lasting about 30 d, and finally a fast decline. Its absolute peak magnitude (M<SUB>r</SUB> ≃ -12 mag) is fainter than that of core-collapse supernovae, and is consistent with those of supernova impostors and other intermediate-luminosity optical transients. The quasi-bolometric light-curve peaks at ∼2 × 10<SUP>40</SUP> erg s<SUP>-1</SUP>, and the late-time photometry allows us to constrain an ejected <SUP>56</SUP>Ni mass of ∼8 × 10<SUP>-4</SUP> M<SUB>☉</SUB>. The spectra of AT 2017 be show minor evolution over the observational period, a relatively blue continuum showing at early phases, which becomes redder with time. A prominent H α emission line always dominates over other Balmer lines. Weak Fe II features, Ca II H&K, and the Ca II NIR triplet are also visible, while P-Cygni absorption troughs are found in a high-resolution spectrum. In addition, the [Ca II] λλ7291, 7324 doublet is visible in all spectra. This feature is typical of intermediate-luminosity red transients (ILRTs), similar to SN 2008S. The relatively shallow archival Spitzer data are not particularly constraining. On the other hand, a non-detection in deeper near-infrared HST images disfavours a massive Luminous Blue Variable eruption as the origin for AT 2017be. As has been suggested for other ILRTs, we propose that AT 2017be is a candidate for a weak electron-capture supernova explosion of a superasymptotic giant branch star, still embedded in a thick dusty envelope. | en_US |
dc.language.iso | eng | en_US |
dc.title | AT 2017be - a new member of the class of intermediate-luminosity red transients | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty2070 | en_US |
dc.identifier.isi | 000449616200043 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/480/3/3424/5063576 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 480 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3424 | en_US |
dc.relation.lastpage | 3445 | en_US |
dc.relation.numberofpages | 22 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 23 | 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 | 2018MNRAS.480.3424C | 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.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0002-7259-4624 | - |
crisitem.author.orcid | 0000-0002-3938-692X | - |
crisitem.author.orcid | 0000-0002-3256-0016 | - |
crisitem.author.orcid | 0000-0001-5008-8619 | - |
crisitem.author.orcid | 0000-0002-1381-9125 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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sty2070.pdf | pdf editoriale | 2.73 MB | Adobe PDF | View/Open |
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