L183 (L134N) Revisited. II. The dust content
Résumé
We present here a complete dust map of L183 (=L134N) with opacities ranging from AVb = 3 to 150 mag. Five peaks are identified as being related to known molecular peaks and among these dust peaks two are liable to form stars. The main peak is a prestellar core with a density profile proportional to r-1 up to a radius of ˜4500 AU and the northern peak could possibly be on its way to form a prestellar core. If true, this is the first example of the intermediate steps between cloud cores and prestellar cores during the quasi-static contraction. Additionally, the low dust temperature of the core reported in Pagani et al. (\cite{Pagani03b}) is confirmed, and the ISOPHOT data are shown to be inappropriate for finding such cores. In the inner core, Tdust ≈ 7.5 K and could be as low as 6.7 K.
Domaines
Astrophysique [astro-ph]| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
|---|