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The Large-scale Behavior in the Disk of delta Scorpii from 2000 to 2018

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Autor(es):
Suffak, M. W. [1] ; Jones, C. E. [1] ; Tycner, C. [2] ; Henry, G. W. [3] ; Carciofi, A. C. [4] ; Mota, B. C. [4] ; Rubio, A. C. [4]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Western Univ, Dept Phys & Astron, London, ON N6A 3K7 - Canada
[2] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 - USA
[3] Tennessee State Univ, Ctr Excellence Informat Syst, Nashville, TN 37209 - USA
[4] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: ASTROPHYSICAL JOURNAL; v. 890, n. 1 FEB 10 2020.
Citações Web of Science: 0
Resumo

We model the circumstellar disk of delta Sco using the three-dimensional Monte Carlo radiative transfer code HDUST in order to quantify the large-scale changes in the disk through the years 2000-2018, and to see if these changes can be attributed to the secondary star affecting the disk throughout its orbit. We determine our best-fitting models through matching simulated observations to actual H alpha spectroscopy and V-band photometric observations. Our modeling results confirm previous findings that the disk of delta Sco was forming early in the century. We also find a period of disk dissipation when the companion is at apastron, as well as a significant growth of the disk between 2009 and 2011, prior to the periastron of 2011. Due to the steady-state nature of the disk after 2011, it is difficult to say whether the variations seen are due to the effect of the close passage of the binary companion. (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
Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários