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Recurrent Strong Outbursts of an EXor-like Young Eruptive Star Gaia20eae

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dc.abstract.enWe present follow-up photometric and spectroscopic observations, and subsequent analysis of Gaia20eae. This source triggered photometric alerts during 2020 after showing a ~3 mag increase in its brightness. Its Gaia Alert light curve showed the shape of a typical eruptive young star. We carried out observations to confirm Gaia20eae as an eruptive young star and classify it. Its pre-outburst spectral energy distribution shows that Gaia20eae is a moderately embedded Class II object with L <SUB>bol</SUB> = 7.22 L <SUB>⊙</SUB>. The color-color and color-magnitude diagrams indicate that the evolution in the light curve is mostly gray. Multiple epochs of the Hα line profile suggest an evolution of the accretion rate and winds. The near-infrared spectra display several emission lines, a feature typical of EX Lupi-type (EXor) eruptive young stars. We estimated the mass accretion rate during the dimming phase to be $dot{M}$ = 3-8 × 10<SUP>-7</SUP> M <SUB>⊙</SUB> yr<SUP>-1</SUP>, higher than typical T Tauri stars of similar mass and comparable to other EXors. We conclude Gaia20eae is a new EXor-type candidate.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorFiorellino, Eleonora
dc.contributor.authorWyrzykowski, Łukasz
dc.contributor.authorDróżdż, Marek
dc.contributor.authorSzakáts, Róbert
dc.contributor.authorKun, Mária
dc.contributor.authorGarcía-Álvarez, David
dc.contributor.authorKóspál, Ágnes
dc.contributor.authorSzabados, László
dc.contributor.authorNisini, Brunella
dc.contributor.authorKriskovics, Levente
dc.contributor.authorSzabó, Zsófia Marianna
dc.contributor.authorMiera, Fernando Cruz-Sáenz de
dc.contributor.authorSonbas, Eda
dc.contributor.authorPark, Sunkyung
dc.contributor.authorAntoniucci, Simone
dc.contributor.authorOgłoza, Waldemar
dc.contributor.authorÁbrahám, Péter
dc.contributor.authorGiannini, Teresa
dc.contributor.authorZieliński, Paweł
dc.contributor.authorVinkó, József
dc.contributor.authorNagy, Zsófia
dc.contributor.authorSiwak, Michał
dc.contributor.authorOrdasi, András
dc.contributor.authorVida, Krisztián
dc.date.accessioned2024-01-25T19:08:14Z
dc.date.available2024-01-25T19:08:14Z
dc.date.copyright2022-03-09
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.versionFINAL_PUBLISHED
dc.description.volume927
dc.identifier.doi10.3847/1538-4357/AC477F
dc.identifier.issn0004-637X
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/118064
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2022ApJ...927..125C
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstrophysical Journal
dc.relation.pages125
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleRecurrent Strong Outbursts of an EXor-like Young Eruptive Star Gaia20eae
dc.typeJournalArticle
dspace.entity.typePublication