Forbidden hugs in pandemic times: III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631

Vista sencilla de ítem
dc.contributor.authorCai, Y.-Z.
dc.contributor.authorPastorello, A.
dc.contributor.authorFraser, M.
dc.contributor.authorWang, X.-F.
dc.contributor.authorFilippenko, A.V.
dc.contributor.authorReguitti, A.
dc.contributor.authorPatra, K.C.
dc.contributor.authorGoranskij, V.P.
dc.contributor.authorBarsukova, E.A.
dc.contributor.authorBrink, T.G.
dc.contributor.authorElias-Rosa, N.
dc.contributor.authorStevance, H.F.
dc.contributor.authorZheng, W.
dc.contributor.authorYang, Y.
dc.contributor.authorAtapin, K.E.
dc.contributor.authorBenetti, S.
dc.contributor.authorDe Boer, T.J.L.
dc.contributor.authorBose, S.
dc.contributor.authorBurke, J.
dc.contributor.authorByrne, R.
dc.contributor.authorCappellaro, E.
dc.contributor.authorChambers, K.C.
dc.contributor.authorChen, W.-L.
dc.contributor.authorEmami, N.
dc.contributor.authorGao, H.
dc.contributor.authorHiramatsu, D.
dc.contributor.authorHowell, D.A.
dc.contributor.authorHuber, M.E.
dc.contributor.authorKankare, E.
dc.contributor.authorKelly, P.L.
dc.contributor.authorKotak, R.
dc.contributor.authorKravtsov, T.
dc.contributor.authorLander, V. Yu.
dc.contributor.authorLi, Z.-T.
dc.contributor.authorLin, C.-C.
dc.contributor.authorLundqvist, P.
dc.contributor.authorMagnier, E.A.
dc.contributor.authorMalygin, E.A.
dc.contributor.authorMaslennikova, N.A.
dc.contributor.authorMatilainen, K.
dc.contributor.authorMazzali, P.A.
dc.contributor.authorMccully, C.
dc.contributor.authorMo, J.
dc.contributor.authorMoran, S.
dc.contributor.authorNewsome, M.
dc.contributor.authorOparin, D.V.
dc.contributor.authorPadilla Gonzalez, E.
dc.contributor.authorReynolds, T.M.
dc.contributor.authorShatsky, N.I.
dc.contributor.authorSmartt, S.J.
dc.contributor.authorSmith, K.W.
dc.contributor.authorStritzinger, M.D.
dc.contributor.authorTatarnikov, A.M.
dc.contributor.authorTerreran, G.
dc.contributor.authorUklein, R.I.
dc.contributor.authorValerin, G.
dc.contributor.authorVallely, P.J.
dc.contributor.authorVozyakova, O.V.
dc.contributor.authorWainscoat, R.
dc.contributor.authorYan, S.-Y.
dc.contributor.authorZhang, J.-J.
dc.contributor.authorZhang, T.-M.
dc.contributor.authorZheltoukhov, S.G.
dc.contributor.authorDastidar, R.
dc.contributor.authorFulton, M.
dc.contributor.authorGalbany, L.
dc.contributor.authorGangopadhyay, A.
dc.contributor.authorGe, H.-W.
dc.contributor.authorGutiérrez, C.P.
dc.contributor.authorLin, H.
dc.contributor.authorMisra, K.
dc.contributor.authorOu, Z.-W.
dc.contributor.authorSalmaso, I.
dc.contributor.authorTartaglia, L.
dc.contributor.authorXiao, L.
dc.contributor.authorZhang, X.-H.
dc.date.accessioned2024-04-08T23:57:54Z
dc.date.available2024-04-08T23:57:54Z
dc.date.issued2022-11-01
dc.descriptionIndexación: Scopus.
dc.description.abstractWe present an observational study of the luminous red nova (LRN) AT 2021biy in the nearby galaxy NGC 4631. The field of the object was routinely imaged during the pre-eruptive stage by synoptic surveys, but the transient was detected only at a few epochs from ∼231 days before maximum brightness. The LRN outburst was monitored with unprecedented cadence both photometrically and spectroscopically. AT 2021biy shows a short-duration blue peak, with a bolometric luminosity of ∼1.6×1041 erg s-1, followed by the longest plateau among LRNe to date, with a duration of 210 days. A late-time hump in the light curve was also observed, possibly produced by a shell-shell collision. AT 2021biy exhibits the typical spectral evolution of LRNe. Early-time spectra are characterised by a blue continuum and prominent H emission lines. Then, the continuum becomes redder, resembling that of a K-type star with a forest of metal absorption lines during the plateau phase. Finally, late-time spectra show a very red continuum (TBB ≈ 2050 K) with molecular features (e.g., TiO) resembling those of M-type stars. Spectropolarimetric analysis indicates that AT 2021biy has local dust properties similar to those of V838 Mon in the Milky Way Galaxy. Inspection of archival Hubble Space Telescope data taken on 2003 August 3 reveals a ∼20 M⊗ progenitor candidate with log (L/L⊗) = 5.0 dex and Teff 5900 K at solar metallicity. The above luminosity and colour match those of a luminous yellow supergiant. Most likely, this source is a close binary, with a 17-24 M⊗ primary component. © Y.-Z. Cai et al. 2022.
dc.description.urihttps://www.aanda.org/articles/aa/full_html/2022/11/aa44393-22/aa44393-22.html
dc.identifier.citationAstronomy and Astrophysics, Volume 667, 1 November 2022, Article number A4
dc.identifier.doi10.1051/0004-6361/202244393
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/55780
dc.language.isoen
dc.publisherEDP Sciences
dc.rights.licenseCC BY 4.0 DEED Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectBinaries: close
dc.subjectStars: individual: AT 2021biy
dc.subjectStars: winds, outflows
dc.subjectForestry
dc.subjectGalaxies
dc.subjectStars
dc.subjectBinaries: close
dc.subjectBolometric luminosities
dc.subjectLight curves
dc.subjectObservational study
dc.subjectShort durations
dc.subjectStar: individual: AT 2021biy
dc.subjectStars: individual: proxima Centauri
dc.subjectStars: winds outflows
dc.subjectSynoptic surveys
dc.subjectTime spectrum
dc.titleForbidden hugs in pandemic times: III. Observations of the luminous red nova AT 2021biy in the nearby galaxy NGC 4631
dc.typeArtículo
Archivos
Bloque original
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
Cai_Forbidden_hugs_in_pandemic_times.pdf
Tamaño:
2.85 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO EN INGLÉS
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Artículos de Revista