Resumo

VASCONCELOS, M. J.; CERQUEIRA, A. H.; RAGA, A. C.  e  AMORIM, R. R.. Photoevaporation of a binary proplyd system. Rev. mex. astron. astrofis [online]. 2010, vol.46, n.1, pp.79-87. ISSN 0185-1101.

We present 3D numerical simulations of photo-evaporation of a binary accretion disk system inside an H II region. The simulations take into account far-and extreme-ultraviolet (FUV and EUV) radiation from a stellar source. We study both FUV dominated and EUV dominated models. FUV dominated models show a well defined interproplyd shell in both Ha emission and density maps, when the separation of the binary system is relatively large (~ 2 000 AU). For smaller separations ( 200 AU), the interproplyd shell no longer develops. We show that an EUV model with a suitable choice of parameters increases the Ha emission of the interproplyd shell relative to the emission of the ionization fronts, in better agreement with the observations of the binary proplyd LV1.

Palavras-chave : H II regions; stars: circumstellar matter; stars: mass loss; stars: pre-main sequence.