Abstract

We report far-infrared Herschel observations obtained between 70 μm and 500 μm 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 six PACS and SPIRE photometric bands, but it is not visible in the Spitzer map at 24 μm. B1-bN is clearly detected between 100 μm and 250 μm. 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 spectral energy distributions. At least a two-component model is required, consisting of a central source surrounded by a dusty envelope. 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 studying the mutual interactions between two forming stars at a very early stage of their evolution.

Autore Pugliese

• Strafella Francesco

Tutti gli autori

• S. Pezzuto , D. Elia , E. Schisano , F. Strafella , J. Di Francesco , S. Sadavoy , P. André , M. Benedettini , J. P. Bernard , A. M. di Giorgio , A. Facchini , M. Hennemann , T. Hill , V. Könyves , S. Molinari , F. Motte , Q. Nguyen-Luong , N. Peretto , M. Pestalozzi , D. Polychroni , K. L. J. Rygl , P. Saraceno , N. Schneider , L. Spinoglio , L. Testi , D. Ward-Thompson , and G. J. White

Titolo volume/Rivista

ASTRONOMY & ASTROPHYSICS

Anno di pubblicazione

2012

ISSN

0004-6361

ISBN

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Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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