The JCMT Plane Survey: early results from the ℓ = 30° field

Moore, T. J. T.; Plume, R.; Thompson, M. A.; Parsons, Harriet; Urquhart, J. S.; Eden, David; Dempsey, Jessica T.; Morgan, L. K.; Thomas, H. S.; Buckle, J.; Brunt, Christopher M.; Butner, H. M.; Carretero, D.; Chrysostomou, A.; Devilliers, H. M.; Fich, M.; Hoare, M. G.; Manser, G.; Mottram, J. C.; Natario, C.; Olguin, Fernando A.; Peretto, N.; Polychroni, D.; Redman, R. O.; Rigby, Andrew; Salji, C.; Summers, L. J.; Berry, D. S.; Currie, Malcolm J.; Jenness, Tim; Pestalozzi, M.; Traficante, A.; Bastien, Pierre; Difrancesco, J.; Davis, C. J.; Evans, A.; Friberg, Per; Fuller, G. A.; Gibb, A. G.; Gibson, Steven J.; Hill, T.; Johnstone, Doug; Joncas, G.; Longmore, Steven N.; Lumsden, S. L.; Martín, P. G.; Luong, Q. Nguyên; Pineda, Jaime E.; Purcell, Cormac; Richer, J. S.; Schieven, G.; Shipman, R. F.; Spaans, Marco; Taylor, A. R.; Viti, S.; Weferling, B.; White, G. J.; Zhu, Meiping

doi:10.1093/mnras/stv1833

Cited by 54 publications

(51 citation statements)

References 54 publications

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“…Large infra-red/sub-mm surveys generated numerous estimates of the ClumpMF (e.g., Reid & Wilson 2005Eden et al 2012;Tackenberg et al 2012;Urquhart et al 2014a;Moore et al 2015). Likewise, data from Hi-GAL have been used for building the ClumpMF in selected regions of the Galactic plane (Olmi et al 2013;Elia et al 2013).…”

Section: The Clumpmfmentioning

confidence: 99%

“…Numerous observational surveys have been undertaken in recent years in different wavebands to obtain a better statistics on massive pre-and proto-stellar objects. (Jackson et al 2006;Stil et al 2006;Lawrence et al 2007;Churchwell et al 2009;Carey et al 2009;Schuller et al 2009;Rosolowsky et al 2010;Hoare et al 2012;Urquhart et al 2014a; Moore et al 2015). Among these, Hi-GAL is the only complete far-infrared (FIR) survey of the Galactic plane.…”

Section: Introductionmentioning

confidence: 99%

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The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71$_{.}^{\circ}$0 < ℓ < 67$_{.}^{\circ}$0)

Elia

Molinari

Schisano

et al. 2017

Monthly Notices of the Royal Astronomical Society

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Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 µm. We present a band-merged catalogue of spatially matched sources and their properties derived from fits to the spectral energy distributions (SEDs) and heliocentric distances, based on the photometric catalogs presented in Molinari et al. (2016a), covering the portion of Galactic plane −71.0 • < < 67.0 • . The band-merged catalogue contains 100922 sources with a regular SED, 24584 of which show a 70 µm counterpart and are thus considered proto-stellar, while the remainder are considered starless. Thanks to this huge number of sources, we are able to carry out a preliminary analysis of early stages of star formation, identifying the conditions that characterise different evolutionary phases on a statistically significant basis. We calculate surface densities to investigate the gravitational stability of clumps and their potential to form massive stars. We also explore evolutionary status metrics such as the dust temperature, luminosity and bolometric temperature, finding that these are higher in proto-stellar sources compared to prestellar ones. The surface density of sources follows an increasing trend as they evolve from pre-stellar to proto-stellar, but then it is found to decrease again in the majority of the most evolved clumps. Finally, we study the physical parameters of sources with respect to Galactic longitude and the association with spiral arms, finding only minor or no differences between the average evolutionary status of sources in the fourth and first Galactic quadrants, or between "on-arm" and "inter-arm" positions.

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Section: The Clumpmfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71$_{.}^{\circ}$0 < ℓ < 67$_{.}^{\circ}$0)

Elia

Molinari

Schisano

et al. 2017

Monthly Notices of the Royal Astronomical Society

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151

186

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“…10). Full details of the JPS observing strategy and preliminary results from the region of = 27 • -33 • can be found in Moore et al (2015).…”

Section: Jcmt Plane Surveymentioning

confidence: 99%

The JCMT Plane Survey: first complete data release – emission maps and compact source catalogue

Eden

Moore

Plume

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present the first data release of the James Clerk Maxwell Telescope (JCMT) Plane Survey (JPS), the JPS Public Release 1 (JPSPR1). JPS is an 850-µm continuum survey of six fields in the northern inner Galactic Plane in a longitude range of = 7 • -63 • , made with the Sub-millimetre Common-User Bolometer Array 2 (SCUBA-2). This first data release consists of emission maps of the six JPS regions with an average pixel-to-pixel noise of 7.19 mJy beam −1 , when smoothed over the beam, and a compact-source catalogue containing 7,813 sources. The 95 per cent completeness limits of the catalogue are estimated at 0.04 Jy beam −1 and 0.3 Jy for the peak and integrated flux densities, respectively. The emission contained in the compact-source catalogue is 42 ± 5 per cent of the total and, apart from the large-scale (greater than 8 arcmin) emission, there is excellent correspondence with features in the 500-µm Herschel maps. We find that, with two-dimensional matching, 98 ± 2 per cent of sources within the fields centred at = 20 • , 30 • , 40 • and 50 • are associated with molecular clouds, with 91 ± 3 per cent of the = 30 • and 40 • sources associated with dense molecular clumps. Matching the JPS catalogue to Herschel 70-µm sources, we find that 38 ± 1 per cent of sources show evidence of ongoing star formation. The images and catalogue will be a valuable resource for studies of star formation in the Galaxy and the role of environment and spiral arms in the star formation process.

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“…We excluded regions targeted as part of the previous Galactic plane (Moore et al 2015) or Gould Belt surveys (Ward- Thompson et al 2007) at the James Clerk Maxwell Telescope (JCMT 79 ) because these locations have been extensively observed by other telescopes (e.g., JCMT, NRO 45 m, and PMO 14 m) both by molecular line and by dust continuum emission observations. The TOP survey is therefore highly complementary to these previous surveys.…”

Section: Trao Observations Of Pgccs (Top)mentioning

confidence: 99%

“…FellWalker is less dependent on specific parameter settings than CLUMPFIND (Berry et al 2007). The source extraction process with FellWalker in the SCOPE survey is the same as that used by the JCMT Plane Survey, and details can be found in Moore et al (2015) and Eden et al (2017). A mask constructed above a threshold of 3σ (i.e., three times the pixel-topixel noise) in the S/N map is applied to the intensity map as input for the task CUPID:EXTRACTCLUMPS, which extracts the peak and integrated flux density values of the clumps.…”

Section: Dense Clumpsmentioning

confidence: 99%

The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

Liu

Kim

Juvela

et al. 2018

ApJS

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The low dust temperatures (<14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. "TOP-SCOPE" is a joint survey program targeting ∼2000 PGCCs in J=1-0 transitions of CO isotopologues and ∼1000 PGCCs in 850 μm continuum emission. The objective of the "TOP-SCOPE" survey and the joint surveys (SMT 10 m, KVN 21 m, and NRO 45 m) is to statistically study the initial conditions occurring during star formation and the evolution of molecular clouds, across a wide range of environments. The observations, data analysis, and example science cases for these surveys are introduced with an exemplar source, PGCC G26.53+0.17 (G26), which is a filamentary infrared dark cloud (IRDC). The total mass, length, and mean line mass (M/L) of the G26 filament are ∼6200 M ☉ , ∼12 pc, and ∼500 M ☉ pc −1 , respectively. Ten massive clumps, including eight starless ones, are found along the filament. The most massive clump as a whole may still be in global collapse, while its denser part seems to be undergoing expansion owing to outflow feedback. The fragmentation in the G26 filament from cloud scale to clump scale is in agreement with gravitational fragmentation of an isothermal, nonmagnetized, and turbulent supported cylinder. A bimodal behavior in dust emissivity spectral index (β) distribution is found in G26, suggesting grain growth along the filament. The G26 filament may be formed owing to large-scale compression flows evidenced by the temperature and velocity gradients across its natal cloud.

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The JCMT Plane Survey: early results from the ℓ = 30° field

Cited by 54 publications

References 54 publications

The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71$_{.}^{\circ}$0 < ℓ < 67$_{.}^{\circ}$0)

The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71$_{.}^{\circ}$0 < ℓ < 67$_{.}^{\circ}$0)

The JCMT Plane Survey: first complete data release – emission maps and compact source catalogue

The TOP-SCOPE Survey of Planck Galactic Cold Clumps: Survey Overview and Results of an Exemplar Source, PGCC G26.53+0.17

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