Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone

The Astrophysical Journal 734.2 (2011): 115 reproduced by permission of the AAS

Detalles Bibliográficos
Autores: Currie, Thayne M., Lisse, Carey Michael, Sicilia-Aguilar, Aurora, Rieke, George H., Su, Kate
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/662152
Acceso en línea:http://hdl.handle.net/10486/662152
https://dx.doi.org/10.1088/0004-637X/734/2/115
Access Level:acceso abierto
Palabra clave:Astrochemistry
Infrared: stars
Planets and satellites: formation
Protoplanetary disks
Stars: individual (EF Cha)
Techniques: spectroscopic
Física
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spelling Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zoneCurrie, Thayne M.Lisse, Carey MichaelSicilia-Aguilar, AuroraRieke, George H.Su, KateAstrochemistryInfrared: starsPlanets and satellites: formationProtoplanetary disksStars: individual (EF Cha)Techniques: spectroscopicFísicaThe Astrophysical Journal 734.2 (2011): 115 reproduced by permission of the AASWe describe Spitzer Infrared Spectrograph spectroscopic observations of the ∼10 Myr old star, EF Cha. Compositional modeling of the spectra from 5 μm to 35 μm confirms that it is surrounded by a luminous debris disk with LD /L⊙ ∼ 10-3, containing dust with temperatures between 225 K and 430 K, characteristic of the terrestrial zone. The EF Cha spectrum shows evidence for many solid-state features, unlike most cold, low-luminosity debris disks but like some other 10-20 Myr old luminous, warm debris disks (e.g., HD 113766A). The EF Cha debris disk is unusually rich in a species or combination of species whose emissivities resemble that of finely powdered, laboratory-measured phyllosilicate species (talc, saponite, and smectite), which are likely produced by aqueous alteration of primordial anhydrous rocky materials. The dust and, by inference, the parent bodies of the debris also contain abundant amorphous silicates and metal sulfides, and possibly water ice. The dust's total olivine to the pyroxene ratio of ∼2 also provides evidence of aqueous alteration. The large mass volume of grains with sizes comparable to or below the radiation blow-out limit implies that planetesimals may be colliding at a rate high enough to yield the emitting dust but not so high as to devolatize the planetesimals via impact processing. Because phyllosilicates are produced by the interactions between anhydrous rock and warm, reactive water, EF Cha's disk is a likely signpost for water delivery to the terrestrial zone of a young planetary system.A.S.-A. acknowledges support from the Deutsche Forschungsgemeinschaft (DFG) grant SI 1486/1-1. K.Y.L.S. and G.R. were partially supported by contract 1255094 from Caltech/JPL to the University of Arizona.The American Astronomical SocietyDepartamento de Física TeóricaFacultad de Ciencias20112011-06-20research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/662152https://dx.doi.org/10.1088/0004-637X/734/2/115reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6621522026-06-23T12:46:27Z
dc.title.none.fl_str_mv Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
title Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
spellingShingle Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
Currie, Thayne M.
Astrochemistry
Infrared: stars
Planets and satellites: formation
Protoplanetary disks
Stars: individual (EF Cha)
Techniques: spectroscopic
Física
title_short Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
title_full Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
title_fullStr Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
title_full_unstemmed Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
title_sort Spitzer infrared spectrograph spectroscopy of the 10 Myr old EF Cha debris disk: Evidence for phyllosilicate-rich dust in the terrestrial zone
dc.creator.none.fl_str_mv Currie, Thayne M.
Lisse, Carey Michael
Sicilia-Aguilar, Aurora
Rieke, George H.
Su, Kate
author Currie, Thayne M.
author_facet Currie, Thayne M.
Lisse, Carey Michael
Sicilia-Aguilar, Aurora
Rieke, George H.
Su, Kate
author_role author
author2 Lisse, Carey Michael
Sicilia-Aguilar, Aurora
Rieke, George H.
Su, Kate
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Astrochemistry
Infrared: stars
Planets and satellites: formation
Protoplanetary disks
Stars: individual (EF Cha)
Techniques: spectroscopic
Física
topic Astrochemistry
Infrared: stars
Planets and satellites: formation
Protoplanetary disks
Stars: individual (EF Cha)
Techniques: spectroscopic
Física
description The Astrophysical Journal 734.2 (2011): 115 reproduced by permission of the AAS
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-06-20
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/662152
https://dx.doi.org/10.1088/0004-637X/734/2/115
url http://hdl.handle.net/10486/662152
https://dx.doi.org/10.1088/0004-637X/734/2/115
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Astronomical Society
publisher.none.fl_str_mv The American Astronomical Society
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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