ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud

We present ALMA 1.3 mm continuum observations at 0."2 (25 au) resolution of Elias 2-24, one of the largest andbrightest protoplanetary disks in the Ophiuchus Molecular Cloud, and we report the presence of three partiallyresolved concentric gaps located at ∼20, 52, and 87 au from the star. We pe...

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Autores principales: Ferrero Sosa, Gabriel Antonio, Gamen, Roberto Claudio, Orcajo, Santiago
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
circumstellar matter
planetary systems
protoplanetary disks
stars: individual (Elias 2-24)
techniques: interferometric
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87105
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87105
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
circumstellar matter
planetary systems
protoplanetary disks
stars: individual (Elias 2-24)
techniques: interferometric
spellingShingle Ciencias Astronómicas
circumstellar matter
planetary systems
protoplanetary disks
stars: individual (Elias 2-24)
techniques: interferometric
Ferrero Sosa, Gabriel Antonio
Gamen, Roberto Claudio
Orcajo, Santiago
ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
topic_facet Ciencias Astronómicas
circumstellar matter
planetary systems
protoplanetary disks
stars: individual (Elias 2-24)
techniques: interferometric
description We present ALMA 1.3 mm continuum observations at 0."2 (25 au) resolution of Elias 2-24, one of the largest andbrightest protoplanetary disks in the Ophiuchus Molecular Cloud, and we report the presence of three partiallyresolved concentric gaps located at ∼20, 52, and 87 au from the star. We perform radiative transfer modeling of thedisk to constrain its surface density and temperature radial profile and place the disk structure in the context ofmechanisms capable of forming narrow gaps such as condensation fronts and dynamical clearing by activelyforming planets. In particular, we estimate the disk temperature at the locations of the gaps to be 23, 15, and 12 K(at 20, 52, and 87 au, respectively), very close to the expected snowlines of CO (23-28 K) and N2 (12-15 K).Similarly, by assuming that the widths of the gaps correspond to 4-8x the Hill radii of forming planets (assuggested by numerical simulations), we estimate planet masses in the range of 0.2-1.5 M<sub>Jup</sub>, 1.0-8.0 M<sub>Jup</sub>, and 0.02-0.15 M<sub>Jup</sub> for the inner, middle, and outer gap, respectively. Given the surface density profile of the disk, theamount of missing mass at the location of each one of these gaps (between 4 and 20 M<sub>Jup</sub>) is more than sufficientto account for the formation of such planets.
format Articulo
Articulo
author Ferrero Sosa, Gabriel Antonio
Gamen, Roberto Claudio
Orcajo, Santiago
author_facet Ferrero Sosa, Gabriel Antonio
Gamen, Roberto Claudio
Orcajo, Santiago
author_sort Ferrero Sosa, Gabriel Antonio
title ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
title_short ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
title_full ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
title_fullStr ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
title_full_unstemmed ALMA Observations of Elias 2-24: A Protoplanetary Disk with Multiple Gaps in the Ophiuchus Molecular Cloud
title_sort alma observations of elias 2-24: a protoplanetary disk with multiple gaps in the ophiuchus molecular cloud
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87105
work_keys_str_mv AT ferrerososagabrielantonio almaobservationsofelias224aprotoplanetarydiskwithmultiplegapsintheophiuchusmolecularcloud
AT gamenrobertoclaudio almaobservationsofelias224aprotoplanetarydiskwithmultiplegapsintheophiuchusmolecularcloud
AT orcajosantiago almaobservationsofelias224aprotoplanetarydiskwithmultiplegapsintheophiuchusmolecularcloud
bdutipo_str Repositorios
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