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

Sadavoy, S. I.; Di Francesco, J.; André, Ph.; Pezzuto, S.; Bernard, J.-P.; Bontemps, S.; Bressert, E.; Chitsazzadeh, S.; Fallscheer, C.; Hennemann, M.; Hill, T.; Martin, P.; Motte, F.; Nguyn Lu’o’ng, Q.; Peretto, N.; 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 & Astrophysics, 540, article no. A10.

DOI: https://doi.org/10.1051/0004-6361/201117934

Abstract

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.

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