Pezzuto, S., Elia, D., Schisano, E., Strafella, F., Di Francesco, J., Sadavoy, S., Andre, P., Benedettini, M., Bernard, J. P., di Giorgio, A. M., Facchini, A., Hennemann, M., Hill, T., Koenyves, V., Molinari, S., Motte, F., Nguyen-Luong, Q., Peretto, Nicolas  ORCID: https://orcid.org/0000-0002-6893-602X, Pestalozzi, M., Polychroni, D., Rygl, K. L. J., Saraceno, P., Schneider, N., Spinoglio, L., Testi, L., Ward-Thompson, Derek ORCID: https://orcid.org/0000-0003-1140-2761 and White, G. J.
2012.
Herschel observations of B1-bS and B1-bN: two first hydrostatic core candidates in the Perseus star-forming cloud.
Astronomy and Astrophysics
547
, A54.
10.1051/0004-6361/201219501
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Abstract
We report far-infrared Herschel observations obtained between 70 μm and 500 μm of two star-forming dusty condensations, [HKM99] B1-bS and [HKM99] 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.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy |
| Uncontrolled Keywords: | stars: protostars / stars: individual: [HKM99] B1-bS / stars: individual: [HKM99] B1-bN / stars: individual: [EYG2006] Bolo 81 / stars: individual: [EDJ2009] 295 |
| Additional Information: | Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0004-6361/ (accessed 16/04/2014) |
| Publisher: | EDP Sciences |
| ISSN: | 0004-6361 |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 23 May 2023 15:06 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/56256 |
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