| Texto completo | |
| Autor(es): |
Faes, D. M.
;
Carciofi, A. C.
;
Domiciano de Souza, A.
;
Sigut, TAA
;
Jones, CE
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | STARS WITH THE B[E] PHENOMENON, PROCEEDINGS; v. 506, p. 7-pg., 2016-01-01. |
| Resumo | |
Achernar is a key star to investigate the Be phemonemon. Its importance derives from the possibility of investigating in detail its photospheric and circumstellar emission due to its proximity. Since early 2013 the star entered a new outburst phase, having since then formed a large disk. Here we report our first results to model the recent disk evolution based on a recent precise photospheric characterization. The analysis combine multi-technique data, including broadband polarimetry (OPD/LNA), spectroscopy (FEROS and others) and interferometry (VLTVAMBER and PIONIER). The radiative transfer problem is solved by the HDUST code. The preliminary results indicate that the circumstellar disk was not formed by a constant mass injection, as indicated by the large variability in small temporal scales seen in polarization. Also, the forming disk manifests noticeable azimuthal asymmetries, as seen by the VI R variations in Ha, which suggests that mass ejection from the star is also non-axisymmetric. These elements offer a rare opportunity to evaluate the evolution of a just formed Be disk in detail and derive relevant physical quantities governing the system. (AU) | |
| Processo FAPESP: | 12/04916-7 - Uma visão interferométrica do discos de estrelas quentes |
| Beneficiário: | Daniel Moser Faes |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 10/19060-5 - Uma visão interferométrica de discos de estrelas quentes |
| Beneficiário: | Daniel Moser Faes |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 09/54006-4 - Um cluster de computadores para o Departamento de Astronomia do IAG-USP e para o Núcleo de Astrofísica da UNICSUL |
| Beneficiário: | Elisabete Maria de Gouveia Dal Pino |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |