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The Gaia alerted fading of the FUor-type star Gaia21elv

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cris.lastimport.scopus2024-02-12T19:49:17Z
dc.abstract.enFU Orionis objects (FUors) are eruptive young stars, which exhibit outbursts that last from decades to a century. Due to the duration of their outbursts, and to the fact that only about two dozens of such sources are known, information on the end of their outbursts is limited. Here we analyse follow-up photometry and spectroscopy of Gaia21elv, a young stellar object, which had a several decades long outburst. It was reported as a Gaia science alert due to its recent fading by more than a magnitude. To study the fading of the source and look for signatures characteristic of FUors, we have obtained follow-up near-infrared (NIR) spectra using Gemini South/IGRINS, and both optical and NIR spectra using VLT/X-SHOOTER. The spectra at both epochs show typical FUor signatures, such as a triangular shaped H-band continuum, absorption-line dominated spectrum, and P Cygni profiles. In addition to the typical FUor signatures, [O I], [Fe II], and [S II] were detected, suggesting the presence of a jet or disc wind. Fitting the spectral energy distributions with an accretion disc model suggests a decrease of the accretion rate between the brightest and faintest states. The rapid fading of the source in 2021 was most likely dominated by an increase of circumstellar extinction. The spectroscopy presented here confirms that Gaia21elv is a classical FUor, the third such object discovered among the Gaia science alerts.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNagy, Zsófia
dc.contributor.authorPark, Sunkyung
dc.contributor.authorÁbrahám, Péter
dc.contributor.authorKóspál, Ágnes
dc.contributor.authorMiera, Fernando Cruz-Sáenz de
dc.contributor.authorKun, Mária
dc.contributor.authorSiwak, Michał
dc.contributor.authorSzabó, Zsófia Marianna
dc.contributor.authorSzilágyi, Máté
dc.contributor.authorFiorellino, Eleonora
dc.contributor.authorGiannini, Teresa
dc.contributor.authorLee, Jae-Joon
dc.contributor.authorLee, Jeong-Eun
dc.contributor.authorMarton, Gábor
dc.contributor.authorSzabados, László
dc.contributor.authorVitali, Fabrizio
dc.contributor.authorAndrzejewski, Jan
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorHodgkin, Simon
dc.contributor.authorJabłońska, Maja
dc.contributor.authorMendez, Rene A.
dc.contributor.authorMerc, Jaroslav
dc.contributor.authorMichniewicz, Olga
dc.contributor.authorMikołajczyk, Przemysław
dc.contributor.authorPylypenko, Uliana
dc.contributor.authorRatajczak, Milena
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorZejmo, Michal
dc.contributor.authorZieliński, Paweł
dc.date.accessioned2024-01-26T10:14:18Z
dc.date.available2024-01-26T10:14:18Z
dc.date.copyright2023-07-04
dc.date.issued2023
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.versionORIGINAL_AUTHOR
dc.description.volume524
dc.identifier.doi10.1093/MNRAS/STAD2019
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122355
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2023MNRAS.524.3344N
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages3344-3356
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleThe Gaia alerted fading of the FUor-type star Gaia21elv
dc.typeJournalArticle
dspace.entity.typePublication