Non-Isothermal effects on Be Disks

Autor(es)

Vieira, Rodrigo G. ; Carciofi, Alex C. ; Bjorkman, Jon E. ; Sigut, TAA ; Jones, CE

• Tipo de documento: Artigo Científico
• Fonte: BRIGHT EMISSARIES: BE STARS AS MESSENGERS OF STAR-DISK PHYSICS; v. 506, p. 8-pg., 2016-01-01.

Resumo

In the last decade, the viscous decretion disk model has emerged as the new paradigm for Be star disks. In this contribution, we propose a simple analytical model to estimate the continuum infrared excess arising from these circumstellar disks, in the light of the currently accepted scenario. We demonstrate that the disk can be satisfactorily described by a two component system: an inner optically thick region, which we call the pseudo-photosphere, and a diffuse outer part. In particular, a direct connexion between the disk brightness profile and the thermal structure is derived, and then confronted to realistic numerical simulations. This result quantifies how the non-isothermality of the disk ultimately affects both infrared measured fluxes and visibilities. (AU)

• 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
• Processo FAPESP: 12/20364-4 - Além da sobrevivência da poeira: as regiões internas de discos protoplanetários
• Beneficiário: Rodrigo Georgetti Vieira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado