Mimetização de observações espectroscópicas de objetos astronômicos extensos: uma aplicação de modelos computacionais

• Autor(a) principal: Santana, Paulo Henrique Gomes
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UEFS
• Texto Completo: http://tede2.uefs.br:8080/handle/tede/729
• topic: Nebulosa planetária; Códigos de fotoionização; Linhas espectrais; Planetary nebulae; Photoionization codes; Spectral lines; CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAO

The aim of this work is to mimic the spectroscopic observation carried in a telescope with a diffraction gap, or with optical fiber of extensive astronomic objects, using the codes of computational simulation – which were created to reproduce the physical and chemical conditions of the regions – to obtain this effect. The studied regions were the Planetary Nebulae. So, in this research the photoionization code used was Cloudy because it simulates the radioactive processes of Planetary Nebulae, creating synthetic spectrums to mime a real spectrum. In these spectrums we studied the intensity of the spectral lines responsible for the cooling of the cloud, namely: ([OI] 6300 Å)/(Hβ 4861 Å),([OII] 3727 Å)/(Hβ 4861 Å), ([OIII] 5007 Å)/(Hβ 4861 Å), ([NII] 6548Å + 6584 Å)/(Hβ 4861 Å)e ([NIII] 3869 Å)/(Hβ 4861 Å). We define as main parameters the temperature and the radius to make the modeling and observe its behavior as the temperature and the radius vary. The temperature used in the synthetic spectrum was between 1,5 × 〖10〗^5up intil7,5 × 〖10〗^5 K and the radius ranging between 1,6 up until 1,9 × 〖10〗^14 cm.