JCMT Gould Belt Survey with SCUBA-2 and HARP

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1 JCMT Gould Belt Survey with SCUBA-2 and HARP on behalf of the JCMT Gould Belt Survey coordinators Jenny, James di Francesco, HARP Derek Ward-Thompson & Michiel Hogerheijde. Image: UK ATC

2 JCMT Legacy surveys in the Galaxy 850 and 450 micron continuum with SCUBA-2 JPS: Galactic Plane +/- 1 deg, GBS: nearby SF regions, GBS SCUBA-2 regions Orion A* / B* Perseus* Taurus* Auriga* Cepheus Serpens*/Aquila Ophiuchus* Pipe* IC5146* CrA Lupus V * with HARP CO SASSy: Outer Galaxy +/- 2.5 deg PI time Perseus arm extension +/- 1 deg

3 GBS science aims SCUBA-2 HARP POL-2 Pre/protostellar lifetimes and accretion rates Origin of the IMF and brown dwarfs Structure of cores to clouds Evolutionary classification Mass ejection and accretion rates Core kinematics Clouds and filaments Tests of the standard model of star formation Models of magnetic field geometry, strength and the Chandrasekhar-Fermi method Large scale magnetic fields and turbulence Protostars and YSOcs in Serpens South et al (in prep.)

4 Gould Belt surveys IC5146 Aquila Pipe Nebula Cepheus CrA Serpens Ophiuchus Perseus Orion Taurus/Auriga Lupus Chamaeleon Cores to Disks, Orion, Taurus PACS & SPIRE SCUBA-2 Gould s Belt Herschel Gould Belt Protostellar spectra Enoch et al. 2009

5 Serpens/Aquila SCUBA-2 850micron Herschel 500micron

6 Observing / data reduction HARP 12CO/13CO/C18O (250h GBS + GT + PI, ) planned observing and data reduction complete ~10-15 subregions Orion A and B, Taurus, Auriga, Perseus, Ophiuchus, Serpens, Pipe, IC5146 SCUBA-2 (412h, 2012-Jan 2015) regions (28 Band 1 / 67 Band 2) observing completed 100% end January 2015 data reduction Orion NGC2024 HARP / DSS JCMT GBS / J. Buckle Internal Release 2 (all SCUBA-2 data) JCMT GBS / C. Mowat public maps and catalogues in individual regions release ongoing, linked to papers (CADC DOIs linked to ADS) Joint JCMT Legacy Survey release June 2015/ Feb 2016 (CADC) GBS reduction release summer 2015 (CADC) Lupus I SCUBA-2 850

7 HARP - do outflows drive turbulence? Emily Drabek, Imperial College Perseus IC348 Ophiuchus Eturb = Egrav 2Eturb = Egrav Perseus L1448 Eturb = Eout Curtis et al MNRAS O of M variation between regions White, Drabek et al MNRAS Eout = Egrav Gas is bound Regions with high outflow energies have high turbulent energies

8 SCUBA-2 science Orion A/B Simon Coudé (Montreal PhD) - CO contamination and dust opacity spectral index (S2SRO data) Carl Salji (Cambridge PhD) - filament identification and structure in Orion A N, core mass function (MNRAS) Helen Kirk (Victoria) + student - core clustering in the Orion A S filament Steve Mairs (Victoria PhD) - fragmentation Ophiuchus Kate Pattle (UCLAN PhD) - core stability (with Herschel and HARP) (MNRAS) Perseus Dodds / Greaves/ Scholz (St Andrews) - NGC1333 disks (S2SRO data, MNRAS) Mike Chen (Victoria) - dust emissivity (with Herschel) Taurus Lupus Jane Buckle (Cambridge) - disks (MNRAS in press) Derek Ward-Thompson (UCLAN) - cold cores Chris Mowat (Exeter PhD) - protostars Auriga Hannah Broekhoven-Fiene (Victoria PhD) - Cepheus YSOcs (with Spitzer and Herschel) Kate Pattle (UCLAN) - cores (with Herschel) Serpens/Aquila Jenny (Exeter) - protostellar groups (with Spitzer) Damian Rumble (Exeter PhD) - radiative feedback in MWC297 (MNRAS) and W40 (in prep.) Pipe CrA Disks Antonio Chrysostomou (Herts) /Ana Cabral (Exeter) - structure (with HARP) Lewis Knee (NRC Herzberg) (in data reduction) Emily Drabek (Imperial) HARP joint analysis Emily Drabek (Imperial) - outflow feedback Catalogue statistics Jenny (Exeter) & Sarah Graves (EAO)- JLS

9 Early-stage protostellar multiplicity Jenny, University of Exeter Multiplicity in Serpens South et al in prep. Multiple sources have similar flux distribution to singles Incomplete Pairs Higher multiples Separation distribution consistent with flat

10 Filaments Carl Salji, University of Cambridge, MNRAS 2014 radial density profile p= Not isothermal hydrostatic (Ostriker) p=4

11 Dust temperatures et al MNRAS, Rumble et al MNRAS S450 B450 (Tdust ) 850 = S850 B850 (Tdust ) 450 see Damian Rumble s talk NGC1333 et al MWC297 Rumble et al.2015 NGC1333 JCMT GBS / J. Mottram

12 Dust opacity β and T Mike Chen (UVic) et al., 2015 in prep. Perseus NGC1333 from Herschel + SCUBA-2 Herschel + S850 Herschel only Per B1 β distribution Sadavoy et al., 2013 ApJ Tdust Opacity spectral index β Chen et al., 2015 in prep.

13 Cold cores Derek Ward-Thompson and Kate Pattle, University of Central Lancashire, in prep. Taurus L1495 red SCUBA-2 850um green SPIRE 500um blue SPIRE 250um. GBS SCUBA-2 longer wavelengths + sensitivity + spatial filtering selects for dense, pre-stellar cores

14 Core stability Kate Pattle (University of Central Lancashire) et al., 2015, MNRAS accepted Ophiuchus L1688 SCUBA micron Herschel 100 micron Spitzer 8 micron Gravitationally bound Pressure-confined

15 Disks Dodds, Greaves, Scholz et al MNRAS; Buckle et al MNRAS accepted Taurus L1495 disks (Buckle, Drabek et al. 2015) Disk masses Class I Class II MMSN % MMSN comparison (Dodds, Greaves, Scholz et al. 2014) Evidence for grain growth: spectral index < 3 for disks

16 New JCMT surveys plan and discuss online