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  APEX Observations of the CO Envelope around the Young FUor-type Star V883 Ori

White, J. A., Kóspál, Á., Rab, C., Ábrahám, P., Cruz-Sáenz de Miera, F., Csengeri, T., et al. (2019). APEX Observations of the CO Envelope around the Young FUor-type Star V883 Ori. The Astrophysical Journal, 877.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-D214-7 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-D215-6
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2019ApJ...877...21W (Any fulltext)
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 Creators:
White, J. A.1, Author
Kóspál, Á.1, Author
Rab, C.1, Author
Ábrahám, P.1, Author
Cruz-Sáenz de Miera, F.1, Author
Csengeri, T.1, Author
Fehér, O.1, Author
Güsten, R.1, Author
Henning, T.1, Author
Vorobyov, E.1, Author
Audard, M.1, Author
Postel, A.1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: circumstellar matter stars: individual: V883 Orionis stars: pre- main sequence submillimeter: stars Astrophysics - Earth and Planetary Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics - Solar and Stellar Astrophysics
 Abstract: The accretion-driven outbursts of young FU Orionis-type stars may be a common stage of pre-main-sequence evolution and can have a significant impact on the circumstellar environment as it pertains to the growth of solids and eventually planets. This episodic accretion is thought to be sustained by additional gas infalling from the circumstellar envelope and disk. We present APEX observations of the CO gas in the envelope around V883 Orionis, a young outbursting star. The observations mapped the 12CO(4-3), 12CO(3-2), and 13CO(3-2) lines with the FLASH+ instrument and the 12CO(6-5) line with the SEPIA instrument. We detected high signal-to-noise emission extending out to radii >10,000 au and calculated integrated fluxes of 1100 Jy km s‚àí1 for 12CO(6-5), 2400 Jy km s‚àí1 for 12CO(4-3), 1600 Jy km s‚àí1 for 12CO(3-2), and 450 Jy km s‚àí1 for 13CO(3-2). We used the thermochemical code PRODIMO to test several models and find the data are best described by an envelope structure with M env ‚âà 0.2-0.4 M ‚òâ and a mass- infall rate of {\dot{M}}\inf =1{--}2 {10}-6 {M}»Ø {yr}}-1. We infer that the observed envelope and outflow structure around V883 Ori could be caused by multiple outbursts, consistent with episodic accretion.

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 Dates: 2019
 Publication Status: Issued
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 877 Sequence Number: - Start / End Page: - Identifier: -