The evolution of luminous red nova AT 2017jfs in NGC 4470

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dc.contributor.authorPastorello, A.
dc.contributor.authorChen, T.W.
dc.contributor.authorCai, Y. Z.
dc.contributor.authorMorales-Garoffolo, A.
dc.contributor.authorCano, Z.
dc.contributor.authorMason, E.
dc.contributor.authorBarsukova, E. A.
dc.contributor.authorBenetti, S.
dc.contributor.authorBerton, M.
dc.contributor.authorBose, S.
dc.contributor.authorBufano, F.
dc.contributor.authorCallis, E.
dc.contributor.authorCannizzaro, G.
dc.contributor.authorCartier, R.
dc.contributor.authorChen, Ping
dc.contributor.authorDong, Subo
dc.contributor.authorDyrbye, S.
dc.contributor.authorElias-Rosa, N.
dc.contributor.authorFlörs, A.
dc.contributor.authorFraser, M.
dc.contributor.authorGeier, S.
dc.contributor.authorGoranskij, V. P.
dc.contributor.authorKann, D. A.
dc.contributor.authorKuncarayakti, H.
dc.contributor.authorOnori, F.
dc.contributor.authorReguitti, A.
dc.contributor.authorReynolds, T.
dc.contributor.authorLosada, I. R.
dc.contributor.authorSagués Carracedo, A.
dc.contributor.authorSchweyer, T.
dc.contributor.authorSmartt, S. J.
dc.contributor.authorTatarnikov, A. M.
dc.contributor.authorValeev, A. F.
dc.contributor.authorVogl, C.
dc.contributor.authorWevers, T.
dc.contributor.authorde Ugarte Postigo, A.
dc.contributor.authorIzzo, L.
dc.contributor.authorInserra, C.
dc.contributor.authorKankare, E.
dc.contributor.authorMaguire, K.
dc.contributor.authorSmith, K. W.
dc.contributor.authorStalder, B.
dc.contributor.authorTartaglia, L.
dc.contributor.authorThöne, C. C.
dc.contributor.authorValerin, G.
dc.contributor.authorYoung, D. R.
dc.date.accessioned2023-04-17T20:20:46Z
dc.date.available2023-04-17T20:20:46Z
dc.date.issued2019
dc.descriptionIndexación Scopuses
dc.description.abstractWe present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude of Mg = -15:46 ± 0:15 mag and a bolometric luminosity of 5:5 × 1041 erg s-1. Its light curve has the doublepeak shape typical of luminous red novae (LRNe), with a narrow first peak bright in the blue bands, while the second peak is longer-lasting and more luminous in the red and near-infrared (NIR) bands. During the first peak, the spectrum shows a blue continuum with narrow emission lines of H and Fe II. During the second peak, the spectrum becomes cooler, resembling that of a K-type star, and the emission lines are replaced by a forest of narrow lines in absorption. About 5 months later, while the optical light curves are characterized by a fast linear decline, the NIR ones show a moderate rebrightening, observed until the transient disappears in solar conjunction. At these late epochs, the spectrum becomes reminiscent of that of M-type stars, with prominent molecular absorption bands. The late-time properties suggest the formation of some dust in the expanding common envelope or an IR echo from foreground pre-existing dust. We propose that the object is a common-envelope transient, possibly the outcome of a merging event in a massive binary, similar to NGC4490-2011OT1.es
dc.identifier.citationAstronomy and Astrophysics Volume 625 2019 Article number L8es
dc.identifier.doi10.1051/0004-6361/201935511en
dc.identifier.issn1432-0746
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/48634
dc.language.isoenes
dc.publisherAstronomy and Astrophysicses
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectBinaries: Closees
dc.subjectStars: Massivees
dc.subjectStars: windses
dc.subjectOutflowses
dc.subjectSupernovaees
dc.subjectSupernovae: Individual: AT 2017jfses
dc.subjectSupernovae: Individual: NGC440-2011OT1es
dc.titleThe evolution of luminous red nova AT 2017jfs in NGC 4470es
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