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ALMA and VLA Observations of EX Lupi in Its Quiescent State

dc.contributor.authorWHITE, Jacob Aaron
dc.contributor.authorKÓSPÁL, Á.
dc.contributor.authorHUGHES, A. G.
dc.contributor.authorÁBRAHÁM, P.
dc.contributor.authorAKIMKIN, V.
dc.contributor.authorBANZATTI, A.
dc.contributor.authorCHEN, L.
dc.contributor.authorDE MIERA, F. Cruz-Sáenz
hal.structure.identifierM2A 2020
dc.contributor.authorDUTREY, A.
dc.contributor.authorFLOCK, M.
hal.structure.identifierM2A 2020
dc.contributor.authorGUILLOTEAU, S.
dc.contributor.authorHALES, A. S.
dc.contributor.authorHENNING, T.
dc.contributor.authorKADAM, K.
dc.contributor.authorSEMENOV, D.
dc.contributor.authorSICILIA-AGUILAR, A.
dc.contributor.authorTEAGUE, R.
dc.contributor.authorVOROBYOV, E. I.
dc.date.issued2020-11-19
dc.identifier.issn0004-637X
dc.description.abstractEnExtreme outbursts in young stars may be a common stage of pre-main-sequence stellar evolution. These outbursts, caused by enhanced accretion and accompanied by increased luminosity, can also strongly impact the evolution of the circumstellar environment. We present ALMA and VLA observations of EX Lupi, a prototypical outburst system, at 100 GHz, 45 GHz, and 15 GHz. We use these data, along with archival ALMA 232 GHz data, to fit radiative transfer models to EX Lupi's circumstellar disk in its quiescent state following the extreme outburst in 2008. The best fit models show a compact disk with a characteristic dust radius of 45 au and a total mass of 0.01 M$_{\odot}$. Our modeling suggests grain growth to sizes of at least 3 mm in the disk, possibly spurred by the recent outburst, and an ice line that has migrated inward to $0.2-0.3$ au post-outburst. At 15 GHz, we detected significant emission over the expected thermal disk emission which we attribute primarily to stellar (gyro)synchrotron and free-free disk emission. Altogether, these results highlight what may be a common impact of outbursts on the circumstellar dust.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.title.enALMA and VLA Observations of EX Lupi in Its Quiescent State
dc.typeArticle de revue
dc.identifier.doi10.3847/1538-4357/abbb94
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv2009.14216
bordeaux.journalThe Astrophysical Journal
bordeaux.page37
bordeaux.volume904
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-03066039
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03066039v1
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