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Status: Bibliographieeintrag

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Verfasst von:Huang, Jane [VerfasserIn]   i
 Andrews, Sean M. [VerfasserIn]   i
 Dullemond, Cornelis [VerfasserIn]   i
 Öberg, Karin I. [VerfasserIn]   i
 Qi, Chunhua [VerfasserIn]   i
 Zhu, Zhaohuan [VerfasserIn]   i
 Birnstiel, Tilman [VerfasserIn]   i
 Carpenter, John M. [VerfasserIn]   i
 Isella, Andrea [VerfasserIn]   i
 Macías, Enrique [VerfasserIn]   i
 McClure, Melissa K. [VerfasserIn]   i
 Pérez, Laura M. [VerfasserIn]   i
 Teague, Richard [VerfasserIn]   i
 Wilner, David J. [VerfasserIn]   i
 Zhang, Shangjia [VerfasserIn]   i
Titel:A multifrequency ALMA characterization of substructures in the GM Aur protoplanetary disk
Verf.angabe:Jane Huang, Sean M. Andrews, Cornelis P. Dullemond, Karin I. Öberg, Chunhua Qi, Zhaohuan Zhu, Tilman Birnstiel, John M. Carpenter, Andrea Isella, Enrique Macías, Melissa K. McClure, Laura M. Pérez, Richard Teague, David J. Wilner, and Shangjia Zhang
E-Jahr:2020
Jahr:2020 March 3
Umfang:25 S.
Fussnoten:Gesehen am 28.10.2020
Titel Quelle:Enthalten in: The astrophysical journal / 1
Ort Quelle:London : Institute of Physics Publ., 1996
Jahr Quelle:2020
Band/Heft Quelle:891(2020,1) Artikel-Nummer 48, 25 Seiten
ISSN Quelle:1538-4357
Abstract:The protoplanetary disk around the T Tauri star GM Aur was one of the first hypothesized to be in the midst of being cleared out by a forming planet. As a result, GM Aur has had an outsized influence on our understanding of disk structure and evolution. We present 1.1 and 2.1 mm ALMA continuum observations of the GM Aur disk at a resolution of ∼50 mas (∼8 au), as well as HCO+ J = 3 − 2 observations at a resolution of ∼100 mas. The dust continuum shows at least three rings atop faint, extended emission. Unresolved emission is detected at the center of the disk cavity at both wavelengths, likely due to a combination of dust and free-free emission. Compared to the 1.1 mm image, the 2.1 mm image shows a more pronounced “shoulder” near R ∼ 40 au, highlighting the utility of longer-wavelength observations for characterizing disk substructures. The spectral index α features strong radial variations, with minima near the emission peaks and maxima near the gaps. While low spectral indices have often been ascribed to grain growth and dust trapping, the optical depth of GM Aur’s inner two emission rings renders their dust properties ambiguous. The gaps and outer disk (R > 100 au) are optically thin at both wavelengths. Meanwhile, the HCO+ emission indicates that the gas cavity is more compact than the dust cavity traced by the millimeter continuum, similar to other disks traditionally classified as “transitional.”
DOI:doi:10.3847/1538-4357/ab711e
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag ; Resolving-System: https://dx.doi.org/10.3847/1538-4357/ab711e
 Volltext: https://doi.org/10.3847%2F1538-4357%2Fab711e
 DOI: https://doi.org/10.3847/1538-4357/ab711e
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1736855263
Verknüpfungen:→ Zeitschrift

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