On Lifetimes of Dusty Debris Disks around A-type Stars
Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina.
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IAU Editorial
2021
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| Acceso en línea: | http://hdl.handle.net/11086/18941 |
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I10-R141-11086-18941 |
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I10-R141-11086-189412025-03-10T15:04:45Z On Lifetimes of Dusty Debris Disks around A-type Stars de la Reza, Ramiro Chavero, Carolina Andrea Formación planetaria Discos circunestelares Estrellas enanas A Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Abstract: Abstract: 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). http://journals.cambridge.org/download.php?file=%2FIAU%2FIAU8_S299%2FS1743921313008831a.pdf&code=1bb2a189da69df2d91802b67ab63f032 Astronomía (incluye Astrofísica y Ciencias del Espacio) 2021-07-07T21:05:11Z 2021-07-07T21:05:11Z 2014-01 conferenceObject 1743-9221 1743-9221 http://hdl.handle.net/11086/18941 eng Attribution-NonCommercial-ShareAlike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/ Impreso; Electrónico y/o Digital IAU Editorial |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-141 |
| collection |
Repositorio Digital Universitario (UNC) |
| language |
Inglés |
| topic |
Formación planetaria Discos circunestelares Estrellas enanas A |
| spellingShingle |
Formación planetaria Discos circunestelares Estrellas enanas A de la Reza, Ramiro Chavero, Carolina Andrea On Lifetimes of Dusty Debris Disks around A-type Stars |
| topic_facet |
Formación planetaria Discos circunestelares Estrellas enanas A |
| description |
Fil: Chavero, Carolina Andrea. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. |
| format |
conferenceObject |
| author |
de la Reza, Ramiro Chavero, Carolina Andrea |
| author_facet |
de la Reza, Ramiro Chavero, Carolina Andrea |
| author_sort |
de la Reza, Ramiro |
| title |
On Lifetimes of Dusty Debris Disks around A-type Stars |
| title_short |
On Lifetimes of Dusty Debris Disks around A-type Stars |
| title_full |
On Lifetimes of Dusty Debris Disks around A-type Stars |
| title_fullStr |
On Lifetimes of Dusty Debris Disks around A-type Stars |
| title_full_unstemmed |
On Lifetimes of Dusty Debris Disks around A-type Stars |
| title_sort |
on lifetimes of dusty debris disks around a-type stars |
| publisher |
IAU Editorial |
| publishDate |
2021 |
| url |
http://hdl.handle.net/11086/18941 |
| work_keys_str_mv |
AT delarezaramiro onlifetimesofdustydebrisdisksaroundatypestars AT chaverocarolinaandrea onlifetimesofdustydebrisdisksaroundatypestars |
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1827088527075049472 |