The Characterization of the Dust Content in the Ring Around Sz 91: Indications of Planetesimal Formation?

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dc.contributor.authorMaucó, Karina
dc.contributor.authorCarrasco-González, Carlos
dc.contributor.authorSchreiber, Matthias R.
dc.contributor.authorSierra, Anibal
dc.contributor.authorOlofsson, Johan
dc.contributor.authorBayo, Amelia
dc.contributor.authorCaceres, Claudio
dc.contributor.authorCanovas, Hector
dc.contributor.authorPalau, Aina
dc.date.accessioned2022-11-30T02:46:33Z
dc.date.available2022-11-30T02:46:33Z
dc.date.issued2021
dc.description.abstractOne of the most important questions in the field of planet formation is how millimeter- and centimeter-sized dust particles overcome radial drift and fragmentation barriers to form kilometer-sized planetesimals. ALMA observations of protoplanetary disks, in particular transition disks or disks with clear signs of substructures, can provide new constraints on theories of grain growth and planetesimal formation, and therefore represent one possibility for progress on this issue. We here present ALMA band 4 (2.1 mm) observations of the transition disk system Sz 91, and combine them with previously obtained band 6 (1.3 mm) and band 7 (0.9 mm) observations. Sz 91, with its well-defined millimeter ring, more extended gas disk, and evidence of smaller dust particles close to the star, constitutes a clear case of dust filtering and the accumulation of millimeter-sized particles in a gas pressure bump. We compute the spectral index (nearly constant at ∼3.34), optical depth (marginally optically thick), and maximum grain size (∼0.61 mm) in the dust ring from the multi-wavelength ALMA observations, and compare the results with recently published simulations of grain growth in disk substructures. Our observational results are in strong agreement with the predictions of models for grain growth in dust rings that include fragmentation and planetesimal formation through streaming instability.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameMauco_Alp2021.pdf
dc.identifier.citationKarina Maucó et al 2021 ApJ 923 129en_ES
dc.identifier.doi10.3847/1538-4357/ac21d0
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7416
dc.languageen
dc.publisherAmerican Astronomical Society
dc.rights© 2021. The American Astronomical Society. All rights reserved
dc.sourceThe Astrophysical Journal
dc.subjectPROTOPLANETARY DISKSen_ES
dc.subjectT TAURI STARSen_ES
dc.subjectPLANETARY-DISK INTERACTIONSen_ES
dc.subjectSUBMILLIMETER ASTRONOMYen_ES
dc.subjectRADIO CONTINUUM EMISSIONen_ES
dc.subjectPLANET FORMATIONen_ES
dc.subjectPLANETESIMALSen_ES
dc.titleThe Characterization of the Dust Content in the Ring Around Sz 91: Indications of Planetesimal Formation?
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia

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