Estrellas Be: diagnóstico del medio circunestelar mediante líneas de H del IR cercano. (En prensa)

Salta, Argentina

Congreso; 53° Reunión Anual de la Asociación Argentina de Astronomía; 2010

Abstract. We describe the behavior of the IR emission lines that appear in the K and L band spectra of Be stars and discuss the physical properties of the circumstellar envelopes based on the classification scheme proposed by Mennickent et al. (2009). We found that for stars of Group I, Pfund and Humphreys lines form in an optical thick region, while for Group II stars, Humphreys lines form in optically thinner regions. The transition between Groups I and II could be interpreted in terms of the evolution of the circumstellar disc.We describe the behavior of the IR emission lines that appear in the K and L band spectra of Be stars and discuss the physical properties of the circumstellar envelopes based on the classification scheme proposed by Mennickent et al. (2009). We found that for stars of Group I, Pfund and Humphreys lines form in an optical thick region, while for Group II stars, Humphreys lines form in optically thinner regions. The transition between Groups I and II could be interpreted in terms of the evolution of the circumstellar disc.