ISO Observations of Pre-Stellar Cores and Young Stellar Objects

Abstract

We summarize the observations of the Infrared Space Observatory concerning the earliest stages of the stellar formation. The observations of samples of sources in different evolutionary stages are reviewed, addressing in particular how the physical and chemical properties of the protostellar environments change from the pre-stellar cores to the protostars at the end of their accretion phase. In addition, the mid-IR surveys in nearby star forming regions are discussed showing their implications for the understanding of the stellar initial mass function.

Procura de Estrelas de Alta Massa em Formação

“…A Figura 2.1 apresenta os mapas do núcleo pré-estelar L1544, obtidos a partir de observações com o ISOPHOT nos comprimentos de onda de 90, 170 e 200 µm (Nisini et al, 2005). Dada sua baixa temperatura (T ∼ 10 K), a intensidade da fonte em 90 µmé relativamente baixa quando comparada aos comprimentos de onda mais longos.…”