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  Gas Density Perturbations Induced by One or More Forming Planets in the AS 209 Protoplanetary Disk as Seen with ALMA

Favre, C., Fedele, D., Maud, L., Booth, R., Tazzari, M., Miotello, A., et al. (2019). Gas Density Perturbations Induced by One or More Forming Planets in the AS 209 Protoplanetary Disk as Seen with ALMA. The Astrophysical Journal, 871.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-D39F-A Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-D3A0-7
Genre: Zeitschriftenartikel

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https://ui.adsabs.harvard.edu/abs/2019ApJ...871..107F (beliebiger Volltext)
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 Urheber:
Favre, Cécile1, Autor
Fedele, Davide1, Autor
Maud, Luke1, Autor
Booth, Richard1, Autor
Tazzari, Marco1, Autor
Miotello, Anna1, Autor
Testi, Leonardo1, Autor
Semenov, Dmitry1, Autor
Bruderer, Simon1, Autor
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Schlagwörter: ISM: molecules planet-disk interactions protoplanetary disks
 Zusammenfassung: The formation of planets occurs within protoplanetary disks surrounding young stars, resulting in perturbation of the gas and dust surface densities. Here we report the first evidence of spatially resolved gas surface density (Œ£ g ) perturbation toward the AS 209 protoplanetary disk from the optically thin C18O (J = 2-1) emission. The observations were carried out at 1.3 mm with Atacama Large Millimeter/submillimeter Array at a spatial resolution of about 0.‚Ä≥3 0.‚Ä≥2 (corresponding to ~38 25 au). The C18O emission shows a compact (‚â§60 au), centrally peaked emission and an outer ring peaking at 140 au, consistent with that observed in the continuum emission, and its azimuthally averaged radial intensity profile presents a deficit that is spatially coincident with the previously reported dust map. This deficit can only be reproduced with our physico-thermochemical disk model by lowering Œ£gas by nearly an order of magnitude in the dust gaps. Another salient result is that, contrary to C18O, the DCO+ (J = 3-2) emission peaks between the two dust gaps. We infer that the best scenario to explain our observations (C18O deficit and DCO+ enhancement) is a gas perturbation due to one or more forming planets, which is commensurate with previous continuum observations of the source along with hydrodynamical simulations. Our findings confirm that the previously observed dust gaps are very likely due to perturbation of the gas surface density that is induced by a planet of at least 0.2M J in formation. Finally, our observations also show the potential of using CO isotopologues to probe the presence of one or more Saturn-mass planets.

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 Datum: 2019
 Publikationsstatus: Erschienen
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Titel: The Astrophysical Journal
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 871 Artikelnummer: - Start- / Endseite: - Identifikator: -