The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds

Transition disk objects are pre-main-sequence stars with little or no near-IR excess and significant far-IR excess, implying inner opacity holes in their disks. Here we present a multifrequency study of transition disk candidates located in Lupus I, III, IV, V, VI, Corona Australis, and Scorpius. Co...

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Autores: Romero, Gisela Andrea, Schreiber, Matthias R., Cieza, Lucas A., Rebassa-Mansergas, Alberto, Merín, Bruno, Smith Castelli, Analía Viviana, Allen, Lori, Morrell, Nidia Irene
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/131063
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131063
Access Level:acceso abierto
Palabra clave:Astronomía
accretion, accretion disks
binaries: general
line: identification
protoplanetary disks
stars: pre-main sequence
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repository_id_str
spelling The Nature of Transition Circumstellar Disks : II. Southern Molecular CloudsRomero, Gisela AndreaSchreiber, Matthias R.Cieza, Lucas A.Rebassa-Mansergas, AlbertoMerín, BrunoSmith Castelli, Analía VivianaAllen, LoriMorrell, Nidia IreneAstronomíaaccretion, accretion disksbinaries: generalline: identificationprotoplanetary disksstars: pre-main sequenceTransition disk objects are pre-main-sequence stars with little or no near-IR excess and significant far-IR excess, implying inner opacity holes in their disks. Here we present a multifrequency study of transition disk candidates located in Lupus I, III, IV, V, VI, Corona Australis, and Scorpius. Complementing the information provided by <i>Spitzer</i> with adaptive optics (AO) imaging (NaCo, VLT), submillimeter photometry (APEX), and echelle spectroscopy (Magellan, Du Pont Telescopes), we estimate the multiplicity, disk mass, and accretion rate for each object in our sample in order to identify the mechanism potentially responsible for its inner hole. We find that our transition disks show a rich diversity in their spectral energy distribution morphology, have disk masses ranging from ≲ 1 to 10 M<sub>JUP</sub>, and accretion rates ranging from ≲ 10⁻¹¹ to 10<sup>-7.7</sup> M⊙ yr⁻¹. Of the 17 bona fide transition disks in our sample, three, nine, three, and two objects are consistent with giant planet formation, grain growth, photoevaporation, and debris disks, respectively. Two disks could be circumbinary, which offers tidal truncation as an alternative origin of the inner hole. We find the same heterogeneity of the transition disk population in Lupus III, IV, and Corona Australis as in our previous analysis of transition disks in Ophiuchus while all transition disk candidates selected in Lupus V, VI turned out to be contaminating background asymptotic giant branch stars. All transition disks classified as photoevaporating disks have small disk masses, which indicates that photoevaporation must be less efficient than predicted by most recent models. The three systems that are excellent candidates for harboring giant planets potentially represent invaluable laboratories to study planet formation with the Atacama Large Millimeter/Submillimeter Array.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2012-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/131063enginfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/issn/1538-4357info:eu-repo/semantics/altIdentifier/arxiv/1203.6816info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637x/749/1/79info:eu-repo/semantics/reference/hdl/10915/82481info:eu-repo/semantics/reference/hdl/10915/84693info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:09:43Zoai:sedici.unlp.edu.ar:10915/131063Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:09:43.749SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
title The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
spellingShingle The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
Romero, Gisela Andrea
Astronomía
accretion, accretion disks
binaries: general
line: identification
protoplanetary disks
stars: pre-main sequence
title_short The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
title_full The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
title_fullStr The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
title_full_unstemmed The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
title_sort The Nature of Transition Circumstellar Disks : II. Southern Molecular Clouds
dc.creator.none.fl_str_mv Romero, Gisela Andrea
Schreiber, Matthias R.
Cieza, Lucas A.
Rebassa-Mansergas, Alberto
Merín, Bruno
Smith Castelli, Analía Viviana
Allen, Lori
Morrell, Nidia Irene
author Romero, Gisela Andrea
author_facet Romero, Gisela Andrea
Schreiber, Matthias R.
Cieza, Lucas A.
Rebassa-Mansergas, Alberto
Merín, Bruno
Smith Castelli, Analía Viviana
Allen, Lori
Morrell, Nidia Irene
author_role author
author2 Schreiber, Matthias R.
Cieza, Lucas A.
Rebassa-Mansergas, Alberto
Merín, Bruno
Smith Castelli, Analía Viviana
Allen, Lori
Morrell, Nidia Irene
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astronomía
accretion, accretion disks
binaries: general
line: identification
protoplanetary disks
stars: pre-main sequence
topic Astronomía
accretion, accretion disks
binaries: general
line: identification
protoplanetary disks
stars: pre-main sequence
description Transition disk objects are pre-main-sequence stars with little or no near-IR excess and significant far-IR excess, implying inner opacity holes in their disks. Here we present a multifrequency study of transition disk candidates located in Lupus I, III, IV, V, VI, Corona Australis, and Scorpius. Complementing the information provided by <i>Spitzer</i> with adaptive optics (AO) imaging (NaCo, VLT), submillimeter photometry (APEX), and echelle spectroscopy (Magellan, Du Pont Telescopes), we estimate the multiplicity, disk mass, and accretion rate for each object in our sample in order to identify the mechanism potentially responsible for its inner hole. We find that our transition disks show a rich diversity in their spectral energy distribution morphology, have disk masses ranging from ≲ 1 to 10 M<sub>JUP</sub>, and accretion rates ranging from ≲ 10⁻¹¹ to 10<sup>-7.7</sup> M⊙ yr⁻¹. Of the 17 bona fide transition disks in our sample, three, nine, three, and two objects are consistent with giant planet formation, grain growth, photoevaporation, and debris disks, respectively. Two disks could be circumbinary, which offers tidal truncation as an alternative origin of the inner hole. We find the same heterogeneity of the transition disk population in Lupus III, IV, and Corona Australis as in our previous analysis of transition disks in Ophiuchus while all transition disk candidates selected in Lupus V, VI turned out to be contaminating background asymptotic giant branch stars. All transition disks classified as photoevaporating disks have small disk masses, which indicates that photoevaporation must be less efficient than predicted by most recent models. The three systems that are excellent candidates for harboring giant planets potentially represent invaluable laboratories to study planet formation with the Atacama Large Millimeter/Submillimeter Array.
publishDate 2012
dc.date.none.fl_str_mv 2012-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/131063
url http://sedici.unlp.edu.ar/handle/10915/131063
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-637X
info:eu-repo/semantics/altIdentifier/issn/1538-4357
info:eu-repo/semantics/altIdentifier/arxiv/1203.6816
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637x/749/1/79
info:eu-repo/semantics/reference/hdl/10915/82481
info:eu-repo/semantics/reference/hdl/10915/84693
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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