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On Lifetimes of Dusty Debris Disks around A-type Stars

dc.creatorde la Reza, R.es
dc.creatorChavero, Carolina Andreaes
dc.date.accessioned2021-07-07T21:05:11Z
dc.date.available2021-07-07T21:05:11Z
dc.date.issued2014-01
dc.identifier.isbn1743-9221
dc.identifier.issn1743-9221
dc.identifier.urihttp://hdl.handle.net/11086/18941
dc.descriptionFil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina.es
dc.descriptionAbstract: Using a collection of 40 debris disks (DD) around dwarf A-type stars (from which 17 are spatially resolved) having well determined stellar ages (Vican 2012), we found that for a collisional self-stirring model of flux distributions (Kenyon & Bromley, 2008, 2010) dusty DD occupy for a large part the terminal age positions corresponding the end of the MS phase. This situation does not necessarily mean that the dust generation in these DD is finished at this stage. Dusty DD can continue their lives in the next Post-MS stages, as is the case of the recent first resolved dusty DD with planets around the K-type subgiant star Kappa CrB. This star is considered a ``retired´´ A star (Bonsor et al. 2013). In order to explain the apparent lack of dusty DD in the giant phase, we propose here that this could be due, in part, to a dilution of any planetesimal belt existing around these stars, with the corresponding diminishing of collisions and subsequent dust generation. This dilution is provoked by the dynamical expansion of this belt produced by the important stellar mass loss during the RGB phase. This scenario is being studied by means of numerical simulations by de la Reza, Roig & Chavero (in preparation).en
dc.description.urihttp://journals.cambridge.org/download.php?file=%2FIAU%2FIAU8_S299%2FS1743921313008831a.pdf&code=1bb2a189da69df2d91802b67ab63f032
dc.format.mediumImpreso; Electrónico y/o Digital
dc.language.isoenges
dc.publisherIAU Editoriales
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.subjectPlanetary formationes
dc.subjectDebris diskes
dc.subjectCircumstellar diskes
dc.subjectCircumstellar diskses
dc.subjectDebrises
dc.subjectDiskses
dc.subjectPlanetaryes
dc.subjectFormationes
dc.titleOn Lifetimes of Dusty Debris Disks around A-type Starses
dc.typeconferenceObjectes
dc.journal.referato
dc.description.fieldAstronomía (incluye Astrofísica y Ciencias del Espacio)
dc.conference.cityParis
dc.conference.countryFrancia
dc.conference.editorialIAU Editorial
dc.conference.eventExploring the Formation and Evolution of Planetary Systems
dc.conference.eventcityVictoria
dc.conference.eventcountryCanadá
dc.conference.eventdate2013-6
dc.conference.institutionUniversity of Toronto / University of Victoria
dc.conference.journalExploring the Formation and Evolution of Planetary Systems, Proceedings of the International Astronomical Union, IAU Symposium,
dc.conference.publicationRevista
dc.conference.workArtículo Breve
dc.conference.typeSimposio


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