The JCMT Gould Belt Survey: SCUBA-2 observations of radiative feedback in NGC 1333

Abstract

We present observations of NGC 1333 from SCUBA-2 on the James Clerk Maxwell Telescope (JCMT), observed as a JCMT Gould Belt Survey pilot project during the shared risk campaign when the first of four arrays was installed at each of 450 and 850 μm. Temperature maps are derived from 450 and 850 μm ratios under the assumption of constant dust opacity spectral index β = 1.8. Temperatures indicate that the dust in the northern (IRAS 6/8) region of NGC 1333 is hot, 20–40 K, due to heating by the B star SVS3, other young stars in the IR/optically visible cluster and embedded protostars. Other luminous protostars are also identified by temperature rises at the 17 arcsec resolution of the ratio maps (0.02 pc assuming a distance of 250 pc for Perseus). The extensive heating raises the possibility that the radiative feedback may lead to increased masses for the next generation of stars.

The JCMT Gould Belt Survey: SCUBA-2 observations of circumstellar discs in L 1495

“…The region contains a diffuse cloud (named as a bowl or hub, Davis et al 2010) which is the focus of the dust continuum observations presented here. The CO data were processed through the same iterative mapmaker as the 850 µm data, to apply the same spatial filtering (Hatchell et al 2013;Sadavoy et al 2013).…”

Alma Resolves the Torus of NGC 1068: Continuum and Molecular Line Emission

“…This imaging covered 50 square degrees of nearby clouds within the Gould Belt, including well-known regions such as Auriga (Broekhoven-Fiene et al 2016), Ophiuchus (Pattle et al 2015), Orion (Salji et al 2015a(Salji et al , 2015bKirk et al 2016aKirk et al , 2016bLane et al 2016;Mairs et al 2016), Perseus (Hatchell et al 2013;Sadavoy et al 2013;Chen et al 2016), SerpensMWC297 (Rumble et al 2015), Taurus (Buckle et al 2015;Ward-Thompson et al 2016), and W40 (Rumble et al 2016). Among these targets, the GBS survey covered approximately 2.5 square degrees of the IC 5146 starforming region.…”

“…The 12 CO = -J 3 2 ( ) emission line lies within the SCUBA-2 850 μm bandpass, and can therefore "contaminate" the thermal dust emission measured (Johnstone et al 2003;Drabek et al 2012). Previous observations suggest that the amount of CO contamination is generally small, typically less than 20% (Johnstone et al 2003;Drabek et al 2012;Hatchell et al 2013;Sadavoy et al 2013;Buckle et al 2015;Pattle et al 2015;Salji et al 2015a;Coudé et al 2016;Kirk et al 2016a), though in zones with weak 850 μm emission and a strong CO outflow, CO has been observed to contribute up to 90% of the flux.…”

The JCMT Gould Belt Survey: A First Look at SCUBA-2 Observations of the Lupus I Molecular Cloud

“…A temperature for L1YSO 7 was calculated from the ratio of SCUBA-2 fluxes, assuming a full, opacity-modified Planck function (Reid & Wilson 2005) and a constant dust opacity spectral index, β = 1.8 (Hatchell et al 2013). Following the method of Aniano et al (2011), Pattle et al (2015 and Rumble et al (2016), a model beam convolution kernel was used to produce a map of dust temperature for the Class 0 protostar L1YSO 7.…”