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An ALMA Study of the FU-Ori Type Object V900 Mon: Implications for the Progenitor

hal.structure.identifierAcademia Sinica
dc.contributor.authorTAKAMI, Michihiro
dc.contributor.authorCHEN, Tsu-Sheng
dc.contributor.authorLIU, Hauyu Baobab
dc.contributor.authorHIRANO, Naomi
dc.contributor.authorKOSPAL, Agnes
dc.contributor.authorABRAHAM, Peter
dc.contributor.authorVOROBYOV, Eduard I.
dc.contributor.authorCRUZ-SAENZ DE MIERA, Fernando
hal.structure.identifierFORMATION STELLAIRE 2019
dc.contributor.authorCSENGERI, Timea
dc.contributor.authorGREEN, Joel
dc.contributor.authorHOGERHEIJDE, Michiel
dc.contributor.authorHSIEH, Tien-Hao
dc.contributor.authorKARR, Jennifer L.
hal.structure.identifierSteward Observatory
dc.contributor.authorDONG, Ruobing
dc.contributor.authorTREJO, Alfonso
hal.structure.identifierInstitute of Intelligent Machines
dc.contributor.authorCHEN, Lei
dc.date.accessioned2021-07-07T15:47:31Z
dc.date.available2021-07-07T15:47:31Z
dc.date.issued2019
dc.identifier.issn0004-637X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/95334
dc.description.abstractEnWe present ALMA observations of 12CO, 13CO, and C18O J=2--1 lines and the 230 GHz continuum for the FU Ori-type object (FUor) V900 Mon (d~1.5 kpc), for which the accretion burst was triggered between 1953 and 2009. We identified CO emission associated with a molecular bipolar outflow extending up to a ~10^4 au scale and a rotating molecular envelope extending over >10^4 au. The interaction with the hot energetic FUor wind, which was observed using optical spectroscopy, appears limited to a region within ~400 au of the star. The envelope mass and the collimation of the extended CO outflow suggest that the progenitor of this FUor is a low-mass Class I young stellar object (YSO). These parameters for V900 Mon, another FUor, and a few FUor-like stars are consistent with the idea that FUor outbursts are associated with normal YSOs. The continuum emission is marginally resolved in our observations with a 0."2x0."15 (~300x225 au) beam, and a Gaussian model provides a deconvolved FWHM of ~90 au. The emission is presumably associated with a dusty circumstellar disk, plus a possible contribution from a wind or a wind cavity close to the star. The warm compact nature of the disk continuum emission could be explained with viscous heating of the disk, while gravitational fragmentation in the outer disk and/or a combination of grain growth and their inward drift may also contribute to its compact nature.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.subject.enAstrophysics - Solar and Stellar Astrophysics
dc.subject.enAstrophysics - Astrophysics of Galaxies
dc.title.enAn ALMA Study of the FU-Ori Type Object V900 Mon: Implications for the Progenitor
dc.typeArticle de revue
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique galactique [astro-ph.GA]
dc.identifier.arxiv1909.05520
bordeaux.journalThe Astrophysical Journal
bordeaux.pageaccepted APJ
bordeaux.hal.laboratoriesLaboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804*
bordeaux.institutionCNRS
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-02288792
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02288792v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2019&rft.spage=accepted%20APJ&rft.epage=accepted%20APJ&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=TAKAMI,%20Michihiro&CHEN,%20Tsu-Sheng&LIU,%20Hauyu%20Baobab&HIRANO,%20Naomi&KOSPAL,%20Agnes&rft.genre=article


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