PEZZUTO, Stefano; ELIA, D.; SCHISANO, E.; STRAFELLA, F.; DI FRANCESCO, J.; SADAVOY, S.; ANDRÉ, P.; BENEDETTINI, M.; BERNARD, J. P.; DI GIORGIO, A. M.; FACCHINI, A.; HENNEMANN, M.; HILL, T.; KÖNYVES, V.; MOLINARI, S.; MOTTE, F.; NGUYEN-LUONG, Q.; PERETTO, N.; PESTALOZZI, M.; POLYCHRONI, D.; RYGL, K. L. J.; SARACENO, P.; SCHNEIDER, N.; SPINOGLIO, L.; TESTI, L.; WARD-THOMPSON, D.; WHITE, G. J.

doi:10.1051/0004-6361/201219501

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

Langue

Article de revue

Ce document a été publié dans

Astronomy and Astrophysics - A&A. 2012, vol. 547, p. id.A54

EDP Sciences

Résumé en anglais

We report far-IR Herschel observations obtained between 70 $\mu$m and 500 $\mu$m of two star-forming dusty condensations, B1-bS and B1-bN, in the B1 region of the Perseus star-forming cloud. In the Western part of the Perseus cloud, B1-bS is the only source detected in all of the 6 PACS and SPIRE photometric bands without being visible in the Spitzer map at 24 $\mu$m. B1-bN is clearly detected between 100 $\mu$m and 250 $\mu$m. We have fitted the spectral energy distributions of these sources to derive their physical properties, and find that a simple greybody model fails to reproduce the observed SEDs. At least a two-component model, consisting of a central source surrounded by a dusty envelope is required. The properties derived from the fit, however, suggest that the central source is not a Class 0 object. We then conclude that while B1-bS and B1-bN appear to be more evolved than a pre-stellar core, the best-fit models suggest that their central objects are younger than a Class 0 source. Hence, they may be good candidates to be examples of the first hydrostatic core phase. The projected distance between B1-bS and B1-bN is a few Jeans lengths. If their physical separation is close to this value, this pair would allow the mutual interactions between two forming stars at a very early stage of their evolution to be studied.< Réduire

Métadonnées

Licence d’utilisation du document

Herschel observations of B1-bS and B1-bN: two first hydrostatic core candidates in the Perseus star-forming cloud

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche