THE HERSCHEL AND JCMT GOULD BELT SURVEYS: CONSTRAINING DUST PROPERTIES IN THE PERSEUS B1 CLUMP WITH PACS, SPIRE, AND SCUBA-2

Journal Article · Sat Apr 20 00:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/767/2/126· OSTI ID:22126916

Sadavoy, S. I.; Di Francesco, J.; Johnstone, D.; Fallscheer, C.; Matthews, B. ^[1]; Currie, M. J.; Jenness, T. ^[2]; Drabek, E.; Hatchell, J. ^[3]; Nutter, D. ^[4]; Andre, Ph.; Hennemann, M.; Hill, T.; Koenyves, V. ^[5]; Arzoumanian, D. ^[6]; Benedettini, M. ^[7]; Bernard, J. -P. ^[8]; Duarte-Cabral, A. ^[9]; Friesen, R. ^[10]; Greaves, J. ^[11] ; others, and

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1. Department of Physics and Astronomy, University of Victoria, P.O. Box 355, STN CSC, Victoria, BC V8W 3P6 (Canada)
2. Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, HI 96720 (United States)
3. School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom)
4. School of Physics and Astronomy, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA (United Kingdom)
5. Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, IRFU/Service d'Astrophysique, Saclay, F-91191 Gif-sur-Yvette (France)
6. IAS, CNRS (UMR 8617), Universite Paris-Sud 11, Batiment 121, F-91400 Orsay (France)
7. Istituto di Astrofisica e Planetologia Spaziali, via Fosso del Cavaliere 100, I-00133 Rome (Italy)
8. CNRS, IRAP, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse Cedex 4 (France)
9. Universite de Bordeaux, LAB, UMR 5804, F-33270 Floirac (France)
10. Dunlap Institute, University of Toronto, Toronto, ON M5S 3H8 (Canada)
11. School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS (United Kingdom)

We present Herschel observations from the Herschel Gould Belt Survey and SCUBA-2 science verification observations from the JCMT Gould Belt Survey of the B1 clump in the Perseus molecular cloud. We determined the dust emissivity index using four different techniques to combine the Herschel PACS+SPIRE data at 160-500 {mu}m with the SCUBA-2 data at 450 {mu}m and 850 {mu}m. Of our four techniques, we found that the most robust method was filtering out the large-scale emission in the Herschel bands to match the spatial scales recovered by the SCUBA-2 reduction pipeline. Using this method, we find {beta} Almost-Equal-To 2 toward the filament region and moderately dense material and lower {beta} values ({beta} {approx}> 1.6) toward the dense protostellar cores, possibly due to dust grain growth. We find that {beta} and temperature are more robust with the inclusion of the SCUBA-2 data, improving estimates from Herschel data alone by factors of {approx}2 for {beta} and by {approx}40% for temperature. Furthermore, we find core mass differences of {approx}< 30% compared to Herschel-only estimates with an adopted {beta} = 2, highlighting the necessity of long-wavelength submillimeter data for deriving accurate masses of prestellar and protostellar cores.

• OSTI ID: 22126916
• Journal Information: Astrophysical Journal, Vol. 767, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DUSTS
EMISSION
FILTERS
GRAIN GROWTH
INCLUSIONS
MASS
PIPELINES
PROTOSTARS
STARS
VERIFICATION
WAVELENGTHS