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dc.contributor.authorShivvers, Isaac
dc.contributor.authorZheng, WeiKang
dc.contributor.authorVan Dyk, Schuyler D.
dc.contributor.authorMauerhan, Jon
dc.contributor.authorFilippenko, Alexei V.
dc.contributor.authorSmith, Nathan
dc.contributor.authorFoley, Ryan J.
dc.contributor.authorMazzali, Paolo
dc.contributor.authorKamble, Atish
dc.contributor.authorKilpatrick, Charles D.
dc.contributor.authorMargutti, Raffaella
dc.contributor.authorYuk, Heechan
dc.contributor.authorGraham, M. L.
dc.contributor.authorKelly, Patrick L.
dc.contributor.authorAndrews, Jennifer
dc.contributor.authorMatheson, Thomas
dc.contributor.authorWood-Vasey, W. Michael
dc.contributor.authorPonder, Kara A.
dc.contributor.authorBrown, Peter J.
dc.contributor.authorChevalier, Roger
dc.contributor.authorMilisavljevic, Dan
dc.contributor.authorDrout, Maria
dc.contributor.authorParrent, Jerod
dc.contributor.authorSoderberg, Alicia
dc.contributor.authorAshall, Chris
dc.contributor.authorPiascik, Andrzej
dc.contributor.authorPrentice, Simon
dc.date.accessioned2017-10-06T19:35:24Z
dc.date.available2017-10-06T19:35:24Z
dc.date.issued2017-11
dc.identifier.citationThe nearby Type Ibn supernova 2015G: signatures of asymmetry and progenitor constraints 2017, 471 (4):4381 Monthly Notices of the Royal Astronomical Societyen
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.doi10.1093/mnras/stx1885
dc.identifier.urihttp://hdl.handle.net/10150/625796
dc.description.abstractWe present the results of an extensive observational campaign on the nearby Type Ibn SN 2015G, including data from radio through ultravioletwavelengths. SN2015Gwas asymmetric, showing late-time nebular lines redshifted by similar to 1000 km s(-1). It shared many features with the prototypical SN Ibn 2006jc, including extremely strong He I emission lines and a late-time blue pseudo-continuum. The young SN 2015G showed narrow P-Cygni profiles of He I, but never in its evolution did it showany signature of hydrogen -arguing for a dense, ionized and hydrogenfree circumstellar medium moving outward with a velocity of similar to 1000 km s(-1) and created by relatively recent mass-loss from the progenitor star. Ultraviolet through infrared observations show that the fading SN 2015G (which was probably discovered some 20 d post-peak) had a spectral energy distribution that was well described by a simple, single-component blackbody. Archival HST images provide upper limits on the luminosity of SN 2015G's progenitor, while non-detections of any luminous radio afterglow and optical non-detections of outbursts over the past two decades provide constraints upon its mass-loss history.
dc.description.sponsorshipUS National Science Foundation (NSF) [AST-1211916]; Gary & Cynthia Bengier; Richard & Rhoda Goldman Fund; Christopher R. Redlich Fund; TABASGO Foundation; Miller Institute for Basic Research in Science (UC Berkeley); NSF [PHY-1607611, AST-1518052]; National Aeronautics and Space Administration (NASA) through from the Space Telescope Science Institute [GO-13683, GO-13797, GO-14149, AR-14295, GO-14668]; NASA [NAS5-26555]; Alfred P. Sloan Foundation; David and Lucile Packard Foundation; W. M. Keck Foundation; NASA's Astrophysics Data Analysis Program [NNX13AF35G]en
dc.language.isoenen
dc.publisherOXFORD UNIV PRESSen
dc.relation.urlhttp://academic.oup.com/mnras/article/471/4/4381/4036880/The-nearby-Type-Ibn-supernova-2015G-signatures-ofen
dc.rights© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectstars: mass-lossen
dc.subjectsupernovae: individual: (SN 2015G)en
dc.titleThe nearby Type Ibn supernova 2015G: signatures of asymmetry and progenitor constraintsen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalMonthly Notices of the Royal Astronomical Societyen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-07-02T18:11:52Z
html.description.abstractWe present the results of an extensive observational campaign on the nearby Type Ibn SN 2015G, including data from radio through ultravioletwavelengths. SN2015Gwas asymmetric, showing late-time nebular lines redshifted by similar to 1000 km s(-1). It shared many features with the prototypical SN Ibn 2006jc, including extremely strong He I emission lines and a late-time blue pseudo-continuum. The young SN 2015G showed narrow P-Cygni profiles of He I, but never in its evolution did it showany signature of hydrogen -arguing for a dense, ionized and hydrogenfree circumstellar medium moving outward with a velocity of similar to 1000 km s(-1) and created by relatively recent mass-loss from the progenitor star. Ultraviolet through infrared observations show that the fading SN 2015G (which was probably discovered some 20 d post-peak) had a spectral energy distribution that was well described by a simple, single-component blackbody. Archival HST images provide upper limits on the luminosity of SN 2015G's progenitor, while non-detections of any luminous radio afterglow and optical non-detections of outbursts over the past two decades provide constraints upon its mass-loss history.


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