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Herschel observations of a potential core-forming clump: Perseus B1-E

Sadavoy, S. I., Di Francesco, J., Andre, Ph., Pezzuto, S., Bernard, J. -P., Bontemps, S., Bressert, E., Chitsazzadeh, S., Fallscheer, C., Hennemann, M., Hill, T., Martin, P., Motte, F., Nguyen Luong, Q., Peretto, Nicolas, Reid, M., Schneider, N., Testi, L., White, G. J. and Wilson, C. 2012. Herschel observations of a potential core-forming clump: Perseus B1-E. Astronomy and Astrophysics 540 , A10. 10.1051/0004-6361/201117934

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We present continuum observations of the Perseus B1-E region from the Herschel Gould Belt Survey. These Herschel data reveal a loose grouping of substructures at 160−500 μm not seen in previous submillimetre observations. We measure temperature and column density from these data and select the nine densest and coolest substructures for follow-up spectral line observations with the Green Bank Telescope. We find that the B1-E clump has a mass of ~100 M⊙ and appears to be gravitationally bound. Furthermore, of the nine substructures examined here, one substructure (B1-E2) appears to be itself bound. The substructures are typically less than a Jeans length from their nearest neighbour and thus, may interact on a timescale of ~1 Myr. We propose that B1-E may be forming a first generation of dense cores, which could provide important constraints on the initial conditions of prestellar core formation. Our results suggest that B1-E may be influenced by a strong, localized magnetic field, but further observations are still required.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: stars: formation; dust, extinction; ISM: individual objects: Perseus 1-E
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 16/04/2014)
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 06:05

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