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1. The JCMT Gould Belt Survey: A First Look at the Auriga-California Molecular Cloud with SCUBA-2

Author

Broekhoven-Fiene, H., Matthews, B. C., Harvey, P., Kirk, H., Chen, M., Currie, M. J., Pattle, K., Lane, J., Buckle, J., Di Francesco, J., Drabek-Maunder, E., Johnstone, D., Berry, D. S., Fich, M., Hatchell, J., Jenness, T., Mottram, J. C., Nutter, D., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chrysostomou, A., Coude, S., Davis, C. J., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wilson, C. D., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present 850 and 450 micron observations of the dense regions within the Auriga-California molecular cloud using SCUBA-2 as part of the JCMT Gould Belt Legacy Survey to identify candidate protostellar objects, measure the masses of their circumstellar material (disk and envelope), and compare the star formation to that in the Orion A molecular cloud. We identify 59 candidate protostars based on the presence of compact submillimeter emission, complementing these observations with existing Herschel/SPIRE maps. Of our candidate protostars, 24 are associated with young stellar objects (YSOs) in the Spitzer and Herschel/PACS catalogs of 166 and 60 YSOs, respectively (177 unique), confirming their protostellar nature. The remaining 35 candidate protostars are in regions, particularly around LkHalpha 101, where the background cloud emission is too bright to verify or rule out the presence of the compact 70 micron emission that is expected for a protostellar source. We keep these candidate protostars in our sample but note that they may indeed be prestellar in nature. Our observations are sensitive to the high end of the mass distribution in Auriga-Cal. We find that the disparity between the richness of infrared star forming objects in Orion A and the sparsity in Auriga-Cal extends to the submillimeter, suggesting that the relative star formation rates have not varied over the Class II lifetime and that Auriga-Cal will maintain a lower star formation efficiency., Comment: 39 pages (54 including the Appendix), 9 figures, 3 tables, in press in ApJ

Published
2018
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2. The JCMT Gould Belt Survey: A First Look at IC 5146

Author

Johnstone, D., Ciccone, S., Kirk, H., Mairs, S., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Hatchell, J., Jenness, T., Mottram, J. C., Pattle, K., Di Francesco, S. Tisi J., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fich, M., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Nutter, D., Pineda, J. E., Salji, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract

We present 450 and 850 micron submillimetre continuum observations of the IC5146 star-forming region taken as part of the JCMT Gould Belt Survey. We investigate the location of bright submillimetre (clumped) emission with the larger-scale molecular cloud through comparison with extinction maps, and find that these denser structures correlate with higher cloud column density. Ninety-six individual submillimetre clumps are identified using FellWalker and their physical properties are examined. These clumps are found to be relatively massive, ranging from 0.5to 116 MSun with a mean mass of 8 MSun and a median mass of 3.7 MSun. A stability analysis for the clumps suggest that the majority are (thermally) Jeans stable, with M/M_J < 1. We further compare the locations of known protostars with the observed submillimetre emission, finding that younger protostars, i.e., Class 0 and I sources, are strongly correlated with submillimetre peaks and that the clumps with protostars are among the most Jeans unstable. Finally, we contrast the evolutionary conditions in the two major star-forming regions within IC5146: the young cluster associated with the Cocoon Nebula and the more distributed star formation associated with the Northern Streamer filaments. The Cocoon Nebula appears to have converted a higher fraction of its mass into dense clumps and protostars, the clumps are more likely to be Jeans unstable, and a larger fraction of these remaining clumps contain embedded protostars. The Northern Streamer, however, has a larger number of clumps in total and a larger fraction of the known protostars are still embedded within these clumps., Comment: 30 pages, 11 figures, 8 tables, accepted by ApJ

Published
2017
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3. The JCMT Gould Belt Survey: A First Look at Southern Orion A with SCUBA-2

Author

Mairs, Steve, Johnstone, D., Kirk, H., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Graves, S., Hatchell, J., Jenness, T., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Salji, C., Di Francesco, J., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coudé, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We present the JCMT Gould Belt Survey's first look results of the southern extent of the Orion A Molecular Cloud ($\delta \leq -5\mathrm{:}31\mathrm{:}27.5$). Employing a two-step structure identification process, we construct individual catalogues for large-scale regions of significant emission labelled as islands and smaller-scale subregions called fragments using the 850 $\mu$m continuum maps obtained using SCUBA-2. We calculate object masses, sizes, column densities, and concentrations. We discuss fragmentation in terms of a Jeans instability analysis and highlight interesting structures as candidates for follow-up studies. Furthermore, we associate the detected emission with young stellar objects (YSOs) identified by Spitzer and Herschel. We find that although the population of active star-forming regions contains a wide variety of sizes and morphologies, there is a strong positive correlation between the concentration of an emission region and its calculated Jeans instability. There are, however, a number of highly unstable subregions in dense areas of the map that show no evidence of star formation. We find that only $\sim$72\% of the YSOs defined as Class 0+I and flat-spectrum protostars coincide with dense 850 $\mu$m emission structures (column densities $>3.7\times10^{21}\mathrm{\:cm}^{-2}$). The remaining 28\% of these objects, which are expected to be embedded in dust and gas, may be misclassified. Finally, we suggest that there is an evolution in the velocity dispersion of young stellar objects such that sources which are more evolved are associated with higher velocities., Comment: 31 Pages, 19 Figures, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS)

Published
2016
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4. The JCMT Gould Belt Survey: Evidence for Dust Grain Evolution in Perseus Star-forming Clumps

Author

Chen, Michael Chun-Yuan, Di Francesco, J., Johnstone, D., Sadavoy, S., Hatchell, J., Mottram, J. C., Kirk, H., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Pezzuto, S., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Schneider-Bontemps, N., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract

The dust emissivity spectral index, $\beta$, is a critical parameter for deriving the mass and temperature of star-forming structures, and consequently their gravitational stability. The $\beta$ value is dependent on various dust grain properties, such as size, porosity, and surface composition, and is expected to vary as dust grains evolve. Here we present $\beta$, dust temperature, and optical depth maps of the star-forming clumps in the Perseus Molecular Cloud determined from fitting SEDs to combined Herschel and JCMT observations in the 160 $\mu$m, 250 $\mu$m, 350 $\mu$m, 500 $\mu$m, and 850 $\mu$m bands. Most of the derived $\beta$, and dust temperature values fall within the ranges of 1.0 - 2.7 and 8 - 20 K, respectively. In Perseus, we find the $\beta$ distribution differs significantly from clump to clump, indicative of grain growth. Furthermore, we also see significant, localized $\beta$ variations within individual clumps and find low $\beta$ regions correlate with local temperature peaks, hinting at the possible origins of low $\beta$ grains. Throughout Perseus, we also see indications of heating from B stars and embedded protostars, as well evidence of outflows shaping the local landscape., Comment: Accepted to ApJ, 15 figures, 3 tables

Published
2016
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5. The JCMT Gould Belt Survey: Evidence for radiative heating and contamination in the W40 complex

Author

Rumble, D., Hatchell, J., Pattle, K., Kirk, H., Wilson, T., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Johnstone, D., Mottram, J. C., Nutter, D., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Walker-Smith, S., Di Francesco, J., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract

We present SCUBA-2 450{\mu}m and 850{\mu}m observations of the W40 complex in the Serpens-Aquila region as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) of nearby star-forming regions. We investigate radiative heating by constructing temperature maps from the ratio of SCUBA-2 fluxes using a fixed dust opacity spectral index, {\beta} = 1.8, and a beam convolution kernel to achieve a common 14.8" resolution. We identify 82 clumps ranging between 10 and 36K with a mean temperature of 20{\pm}3K. Clump temperature is strongly correlated with proximity to the external OB association and there is no evidence that the embedded protostars significantly heat the dust. We identify 31 clumps that have cores with densities greater than 105cm{^{-3}}. Thirteen of these cores contain embedded Class 0/I protostars. Many cores are associated with bright-rimmed clouds seen in Herschel 70 {\mu}m images. From JCMT HARP observations of the 12CO 3-2 line, we find contamination of the 850{\mu}m band of up to 20 per cent. We investigate the free-free contribution to SCUBA-2 bands from large-scale and ultracompact H ii regions using archival VLA data and find the contribution is limited to individual stars, accounting for 9 per cent of flux per beam at 450 {\mu}m or 12 per cent at 850 {\mu}m in these cases. We conclude that radiative heating has potentially influenced the formation of stars in the Dust Arc sub-region, favouring Jeans stable clouds in the warm east and fragmentation in the cool west., Comment: 27 pages, 25 figures, 7 tables, 3 online catalogues

Published
2016
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6. The JCMT Gould Belt Survey: Dense Core Clusters in Orion B

Author

Kirk, H., Johnstone, D., Di Francesco, J., Lane, J., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Hatchell, J., Jenness, T., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., and Ward-Thompson, D.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

The JCMT Gould Belt Legacy Survey obtained SCUBA-2 observations of dense cores within three sub-regions of Orion B: LDN 1622, NGC 2023/2024, and NGC 2068/2071, all of which contain clusters of cores. We present an analysis of the clustering properties of these cores, including the two-point correlation function and Cartwright's Q parameter. We identify individual clusters of dense cores across all three regions using a minimal spanning tree technique, and find that in each cluster, the most massive cores tend to be centrally located. We also apply the independent M-Sigma technique and find a strong correlation between core mass and the local surface density of cores. These two lines of evidence jointly suggest that some amount of mass segregation in clusters has happened already at the dense core stage., Comment: Accepted for publication in ApJ. 22 pages, 11 figures

Published
2016
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7. The JCMT Gould Belt Survey: A First Look at Dense Cores in Orion B

Author

Kirk, H., Di Francesco, J., Johnstone, D., Duarte-Cabral, A., Sadavoy, S., Hatchell, J., Mottram, J. C., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We present a first look at the SCUBA-2 observations of three sub-regions of the Orion B molecular cloud: LDN 1622, NGC 2023/2024, and NGC 2068/2071, from the JCMT Gould Belt Legacy Survey. We identify 29, 564, and 322 dense cores in L1622, NGC 2023/2024, and NGC 2068/2071 respectively, using the SCUBA-2 850 micron map, and present their basic properties, including their peak fluxes, total fluxes, and sizes, and an estimate of the corresponding 450 micron peak fluxes and total fluxes, using the FellWalker source extraction algorithm. Assuming a constant temperature of 20 K, the starless dense cores have a mass function similar to that found in previous dense core analyses, with a Salpeter-like slope at the high-mass end. The majority of cores appear stable to gravitational collapse when considering only thermal pressure; indeed, most of the cores which have masses above the thermal Jeans mass are already associated with at least one protostar. At higher cloud column densities, above 1-2 x 10^23 cm^-2, most of the mass is found within dense cores, while at lower cloud column densities, below 1 x 10^23 cm^-2, this fraction drops to 10% or lower. Overall, the fraction of dense cores associated with a protostar is quite small (<8%), but becomes larger for the densest and most centrally concentrated cores. NGC 2023 / 2024 and NGC 2068/2071 appear to be on the path to forming a significant number of stars in the future, while L1622 has little additional mass in dense cores to form many new stars., Comment: Accepted for publication in ApJ; 28 pages, 19 figures. Data associated with the paper, including the full table 4, can be found at https://doi.org/10.11570/16.0003

Published
2015
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8. The JCMT Gould Belt Survey: A Quantitative Comparison Between SCUBA-2 Data Reduction Methods

Author

Mairs, S., Johnstone, D., Kirk, H., Graves, S., Buckle, J., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Hatchell, J., Jenness, T., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Salji, C., Di Francesco, J., Hogerheijde, M. R., Ward-Thompson, D., and team, the JCMT Gould Belt survey

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Performing ground-based submillimetre observations is a difficult task as the measurements are subject to absorption and emission from water vapour in the Earth's atmosphere and time variation in weather and instrument stability. Removing these features and other artifacts from the data is a vital process which affects the characteristics of the recovered astronomical structure we seek to study. In this paper, we explore two data reduction methods for data taken with the Submillimetre Common-User Bolometer Array-2 (SCUBA-2) at the James Clerk Maxwell Telescope (JCMT). The JCMT Legacy Reduction 1 (JCMT LR1) and The Gould Belt Legacy Survey Legacy Release 1 (GBS LR1) reduction both use the same software, Starlink, but differ in their choice of data reduction parameters. We find that the JCMT LR1 reduction is suitable for determining whether or not compact emission is present in a given region and the GBS LR1 reduction is tuned in a robust way to uncover more extended emission, which better serves more in-depth physical analyses of star-forming regions. Using the GBS LR1 method, we find that compact sources are recovered well, even at a peak brightness of only 3 times the noise, whereas the reconstruction of larger objects requires much care when drawing boundaries around the expected astronomical signal in the data reduction process. Incorrect boundaries can lead to false structure identification or it can cause structure to be missed. In the JCMT LR1 reduction, the extent of the true structure of objects larger than a point source is never fully recovered., Comment: 26 Pages, 16 Figures, Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS)

Published
2015
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9. The JCMT Gould Belt Survey: SCUBA-2 observations of circumstellar disks in L 1495

Author

Buckle, J. V., Drabek-Maunder, E., Greaves, J., Richer, J. S., Matthews, B. C., Johnstone, D., Kirk, H., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Hatchell, J., Jenness, T., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Salji, C., Tisi, S., Di Francesco, J., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Duarte-Cabral, A., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Moriarty-Schieven, G., Rawlings, J., Rosolowsky, E., Rumble, D., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wilson, C. D., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present 850$\mu$m and 450$\mu$m data from the JCMT Gould Belt Survey obtained with SCUBA-2 and characterise the dust attributes of Class I, Class II and Class III disk sources in L1495. We detect 23% of the sample at both wavelengths, with the detection rate decreasing through the Classes from I--III. The median disk mask is 1.6$\times 10^{-3}$M$_{\odot}$, and only 7% of Class II sources have disk masses larger than 20 Jupiter masses. We detect a higher proportion of disks towards sources with stellar hosts of spectral type K than spectral type M. Class II disks with single stellar hosts of spectral type K have higher masses than those of spectral type M, supporting the hypothesis that higher mass stars have more massive disks. Variations in disk masses calculated at the two wavelengths suggests there may be differences in dust opacity and/or dust temperature between disks with hosts of spectral types K to those with spectral type M., Comment: 11 pages, 10 figures plus Appendix. MNRAS accepted

Published
2015
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10. The JCMT Gould Belt Survey: First results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population

Author

Pattle, K., Ward-Thompson, D., Kirk, J. M., White, G. J., Drabek-Maunder, E., Buckle, J., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Hatchell, J., Kirk, H., Jenness, T., Johnstone, D., Mottram, J. C., Nutter, D., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Walker-Smith, S., Di Francesco, J., Hogerheijde, M. R., André, Ph., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Griffin, M. J., Holland, W., Joncas, G., Knee, L. B. G., Könyves, V., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Sadavoy, S., Spinoglio, L., Thomas, H., Tothill, N., Viti, S., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

In this paper we present the first observations of the Ophiuchus molecular cloud performed as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) with the SCUBA-2 instrument. We demonstrate methods for combining these data with previous HARP CO, Herschel, and IRAM N$_{2}$H$^{+}$ observations in order to accurately quantify the properties of the SCUBA-2 sources in Ophiuchus. We produce a catalogue of all of the sources found by SCUBA-2. We separate these into protostars and starless cores. We list all of the starless cores and perform a full virial analysis, including external pressure. This is the first time that external pressure has been included in this level of detail. We find that the majority of our cores are either bound or virialised. Gravitational energy and external pressure are on average of a similar order of magnitude, but with some variation from region to region. We find that cores in the Oph A region are gravitationally bound prestellar cores, while cores in the Oph C and E regions are pressure-confined. We determine that N$_{2}$H$^{+}$ is a good tracer of the bound material of prestellar cores, although we find some evidence for N$_{2}$H$^{+}$ freeze-out at the very highest core densities. We find that non-thermal linewidths decrease substantially between the gas traced by C$^{18}$O and that traced by N$_{2}$H$^{+}$, indicating the dissipation of turbulence at higher densities. We find that the critical Bonnor-Ebert stability criterion is not a good indicator of the boundedness of our cores. We detect the pre-brown dwarf candidate Oph B-11 and find a flux density and mass consistent with previous work. We discuss regional variations in the nature of the cores and find further support for our previous hypothesis of a global evolutionary gradient across the cloud from southwest to northeast, indicating sequential star formation across the region., Comment: 34 pages, 20 figures, 5 tables. Accepted for publication in MNRAS

Published
2015
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11. The JCMT Gould Belt Survey: Evidence for radiative heating in Serpens MWC 297 and its influence on local star formation

Author

Rumble, D., Hatchell, J., Gutermuth, R. A., Kirk, H., Buckle, J., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Johnstone, D., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Walker-Smith, S., Di Francesco, J., Hogerheijde, M. R., Ward-Thompson, D., Allen, L. E., Cieza, L. A., Dunham, M. M., Harvey, P. M., Stapelfeldt, K. R., Bastien, P., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wilson, C. D., Wouterloot, J., Yates, J., and Zhu, M.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We present SCUBA-2 450micron and 850micron observations of the Serpens MWC 297 region, part of the JCMT Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback influences the star-formation process and we investigate observational evidence for this by constructing temperature maps. Maps are derived from the ratio of SCUBA-2 fluxes and a two component model of the JCMT beam for a fixed dust opacity spectral index of beta = 1.8. Within 40 of the B1.5Ve Herbig star MWC 297, the submillimetre fluxes are contaminated by free-free emission with a spectral index of 1.03+-0.02, consistent with an ultra-compact HII region and polar winds/jets. Contamination accounts for 73+-5 per cent and 82+-4 per cent of peak flux at 450micron and 850micron respectively. The residual thermal disk of the star is almost undetectable at these wavelengths. Young Stellar Objects are confirmed where SCUBA-2 850micron clumps identified by the fellwalker algorithm coincide with Spitzer Gould Belt Survey detections. We identify 23 objects and use Tbol to classify nine YSOs with masses 0.09 to 5.1 Msun. We find two Class 0, one Class 0/I, three Class I and three Class II sources. The mean temperature is 15+-2K for the nine YSOs and 32+-4K for the 14 starless clumps. We observe a starless clump with an abnormally high mean temperature of 46+-2K and conclude that it is radiatively heated by the star MWC 297. Jeans stability provides evidence that radiative heating by the star MWC 297 may be suppressing clump collapse., Comment: 24 pages, 13 figures, 7 tables

Published
2014
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12. Alignment in star-debris disc systems seen by Herschel

Author

Greaves, J. S., Kennedy, G. M., Thureau, N., Eiroa, C., Marshall, J. P., Maldonado, J., Matthews, B. C., Olofsson, G., Barlow, M. J., Moro-Martin, A., Sibthorpe, B., Absil, O., Ardila, D. R., Booth, M., Broekhoven-Fiene, H., Brown, D. J. A., Cameron, A. Collier, del Burgo, C., Di Francesco, J., Duchene, G., Eisloffel, J., Ertel, S., Holland, W. S., Horner, J., Kalas, P., Kavelaars, J. J., Lestrade, J. -F., Vican, L., Wilner, D. J., Wolf, S., and Wyatt, M. C.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract

Many nearby main-sequence stars have been searched for debris using the far-infrared Herschel satellite, within the DEBRIS, DUNES and Guaranteed-Time Key Projects. We discuss here 11 stars of spectral types A to M where the stellar inclination is known and can be compared to that of the spatially-resolved dust belts. The discs are found to be well aligned with the stellar equators, as in the case of the Sun's Kuiper belt, and unlike many close-in planets seen in transit surveys. The ensemble of stars here can be fitted with a star-disc tilt of ~<10 degrees. These results suggest that proposed mechanisms for tilting the star or disc in fact operate rarely. A few systems also host imaged planets, whose orbits at tens of AU are aligned with the debris discs, contrary to what might be expected in models where external perturbers induce tilts., Comment: accepted by MNRAS Letters

Published
2013
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13. The JCMT Gould Belt Survey: A First Look at the Auriga–California Molecular Cloud with SCUBA-2

Author

Broekhoven-Fiene, H., primary, Matthews, B. C., additional, Harvey, P., additional, Kirk, H., additional, Chen, M., additional, Currie, M. J., additional, Pattle, K., additional, Lane, J., additional, Buckle, J., additional, Francesco, J. Di, additional, Drabek-Maunder, E., additional, Johnstone, D., additional, Berry, D. S., additional, Fich, M., additional, Hatchell, J., additional, Jenness, T., additional, Mottram, J. C., additional, Nutter, D., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wilson, C. D., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2018
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14. The JCMT Gould Belt Survey: A First Look at IC 5146

Author

Johnstone, D., primary, Ciccone, S., additional, Kirk, H., additional, Mairs, S., additional, Buckle, J., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Hatchell, J., additional, Jenness, T., additional, Mottram, J. C., additional, Pattle, K., additional, Tisi, S., additional, Francesco, J. Di, additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coudé, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fich, M., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Nutter, D., additional, Pineda, J. E., additional, Salji, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2017
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15. The JCMT Gould Belt Survey: A First Look at SCUBA-2 Observations of the Lupus I Molecular Cloud

Author

Mowat, C., primary, Hatchell, J., additional, Rumble, D., additional, Kirk, H., additional, Buckle, J., additional, Berry, D.S., additional, Broekhoven-Fiene, H., additional, Currie, M.J., additional, Jenness, T., additional, Johnstone, D., additional, Mottram, J.C., additional, Pattle, K., additional, Tisi, S., additional, Francesco, J. Di, additional, Hogerheijde, M.R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coudé, S., additional, Davis, C.J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fich, M., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G.A., additional, Graves, S., additional, Greaves, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J.M., additional, Knee, L.B.G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B.C., additional, Moriarty-Schieven, G., additional, Rawlings, J., additional, Retter, B., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G.J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2017
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16. The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region

Author

Pattle, K., primary, Ward-Thompson, D., additional, Kirk, J. M., additional, Di Francesco, J., additional, Kirk, H., additional, Mottram, J. C., additional, Keown, J., additional, Buckle, J., additional, Beaulieu, S. F., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Hatchell, J., additional, Jenness, T., additional, Johnstone, D., additional, Nutter, D., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Walker-Smith, S., additional, Hogerheijde, M. R., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coudé, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2016
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17. The JCMT andHerschelGould Belt Surveys: a comparison of SCUBA-2 andHerscheldata of dense cores in the Taurus dark cloud L1495

Author

Ward-Thompson, D., primary, Pattle, K., additional, Kirk, J. M., additional, Marsh, K., additional, Buckle, J., additional, Hatchell, J., additional, Nutter, D. J., additional, Griffin, M. J., additional, Di Francesco, J., additional, André, P., additional, Beaulieu, S., additional, Berry, D., additional, Broekhoven-Fiene, H., additional, Currie, M., additional, Fich, M., additional, Jenness, T., additional, Johnstone, D., additional, Kirk, H., additional, Mottram, J., additional, Pineda, J., additional, Quinn, C., additional, Sadavoy, S., additional, Salji, C., additional, Tisi, S., additional, Walker-Smith, S., additional, White, G., additional, Hill, T., additional, Könyves, V., additional, Palmeirim, P., additional, and Pezzuto, S., additional

Published
2016
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18. THE JCMT GOULD BELT SURVEY: EVIDENCE FOR DUST GRAIN EVOLUTION IN PERSEUS STAR-FORMING CLUMPS

Author

Chen, Michael Chun-Yuan, primary, Francesco, J. Di, additional, Johnstone, D., additional, Sadavoy, S., additional, Hatchell, J., additional, Mottram, J. C., additional, Kirk, H., additional, Buckle, J., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Jenness, T., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Pezzuto, S., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Schneider-Bontemps, N., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2016
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19. The JCMT Gould Belt Survey: a first look at Southern Orion A with SCUBA-2

Author

Mairs, S., primary, Johnstone, D., additional, Kirk, H., additional, Buckle, J., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Graves, S., additional, Hatchell, J., additional, Jenness, T., additional, Mottram, J. C., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Salji, C., additional, Di Francesco, J., additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coudé, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2016
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20. The JCMT Gould Belt Survey: evidence for radiative heating and contamination in the W40 complex

Author

Rumble, D., primary, Hatchell, J., additional, Pattle, K., additional, Kirk, H., additional, Wilson, T., additional, Buckle, J., additional, Berry, D.S., additional, Broekhoven-Fiene, H., additional, Currie, M.J., additional, Fich, M., additional, Jenness, T., additional, Johnstone, D., additional, Mottram, J. C., additional, Nutter, D., additional, Pineda, J.E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Walker-Smith, S., additional, Francesco, J. Di, additional, Hogerheijde, M.R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C.J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G.A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2016
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21. THE JCMT GOULD BELT SURVEY: A FIRST LOOK AT DENSE CORES IN ORION B

Author

Kirk, H., primary, Francesco, J. Di, additional, Johnstone, D., additional, Duarte-Cabral, A., additional, Sadavoy, S., additional, Hatchell, J., additional, Mottram, J. C., additional, Buckle, J., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Jenness, T., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Mowat, C., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2016
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22. The JCMT Gould Belt Survey: first results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population

Author

Pattle, K., primary, Ward-Thompson, D., additional, Kirk, J. M., additional, White, G. J., additional, Drabek-Maunder, E., additional, Buckle, J., additional, Beaulieu, S. F., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Hatchell, J., additional, Kirk, H., additional, Jenness, T., additional, Johnstone, D., additional, Mottram, J. C., additional, Nutter, D., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Walker-Smith, S., additional, Francesco, J. Di, additional, Hogerheijde, M. R., additional, André, Ph., additional, Bastien, P., additional, Bresnahan, D., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Griffin, M. J., additional, Holland, W., additional, Joncas, G., additional, Knee, L. B. G., additional, Könyves, V., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Spinoglio, L., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2015
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23. The JCMT Gould Belt Survey: SCUBA-2 observations of circumstellar discs in L 1495

Author

Buckle, J. V., primary, Drabek-Maunder, E., additional, Greaves, J., additional, Richer, J. S., additional, Matthews, B.C., additional, Johnstone, D., additional, Kirk, H., additional, Beaulieu, S. F., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Hatchell, J., additional, Jenness, T., additional, Mottram, J. C., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Salji, C., additional, Tisi, S., additional, Francesco, J. Di, additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Duarte-Cabral, A., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Moriarty-Schieven, G., additional, Rawlings, J., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wilson, C. D., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2015
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24. The JCMT Gould Belt Survey: constraints on prestellar core properties in Orion A North

Author

Salji, C. J., primary, Richer, J. S., additional, Buckle, J. V., additional, Hatchell, J., additional, Kirk, H., additional, Beaulieu, S. F., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Jenness, T., additional, Johnstone, D., additional, Mottram, J. C., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Quinn, C., additional, Tisi, S., additional, Walker-Smith, S., additional, Francesco, J. Di, additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Bastien, P., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Rawlings, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Rumble, D., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wilson, C. D., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2015
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25. The JCMT Gould Belt Survey: evidence for radiative heating in Serpens MWC 297 and its influence on local star formation

Author

Rumble, D., primary, Hatchell, J., additional, Gutermuth, R. A., additional, Kirk, H., additional, Buckle, J., additional, Beaulieu, S. F., additional, Berry, D. S., additional, Broekhoven-Fiene, H., additional, Currie, M. J., additional, Fich, M., additional, Jenness, T., additional, Johnstone, D., additional, Mottram, J. C., additional, Nutter, D., additional, Pattle, K., additional, Pineda, J. E., additional, Quinn, C., additional, Salji, C., additional, Tisi, S., additional, Walker-Smith, S., additional, Francesco, J. Di, additional, Hogerheijde, M. R., additional, Ward-Thompson, D., additional, Allen, L. E., additional, Cieza, L. A., additional, Dunham, M. M., additional, Harvey, P. M., additional, Stapelfeldt, K. R., additional, Bastien, P., additional, Butner, H., additional, Chen, M., additional, Chrysostomou, A., additional, Coude, S., additional, Davis, C. J., additional, Drabek-Maunder, E., additional, Duarte-Cabral, A., additional, Fiege, J., additional, Friberg, P., additional, Friesen, R., additional, Fuller, G. A., additional, Graves, S., additional, Greaves, J., additional, Gregson, J., additional, Holland, W., additional, Joncas, G., additional, Kirk, J. M., additional, Knee, L. B. G., additional, Mairs, S., additional, Marsh, K., additional, Matthews, B. C., additional, Moriarty-Schieven, G., additional, Rawlings, J., additional, Richer, J., additional, Robertson, D., additional, Rosolowsky, E., additional, Sadavoy, S., additional, Thomas, H., additional, Tothill, N., additional, Viti, S., additional, White, G. J., additional, Wilson, C. D., additional, Wouterloot, J., additional, Yates, J., additional, and Zhu, M., additional

Published
2015
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26. The JCMT Gould Belt Survey: first results from SCUBA-2 observations of the Cepheus Flare region.

Author

Pattle, K., Ward-Thompson, D., Kirk, J. M., Francesco, Di, Kirk, H., Mottram, J. C., Keown, J., Buckle, J., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Hatchell, J., Jenness, T., Johnstone, D., Nutter, D., Pineda, J. E., Quinn, C., and Salji, C.

Subjects
ASTRONOMICAL surveys, ASTRONOMICAL observations, TELESCOPE design & construction, MOLECULAR clouds, STAR formation
Abstract

We present observations of the Cepheus Flare obtained as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Legacy Survey (GBLS) with the SCUBA-2 instrument. We produce a catalogue of sources found by SCUBA-2, and separate these into starless cores and protostars. We determine masses and densities for each of our sources, using source temperatures determined by the Herschel Gould Belt Survey. We compare the properties of starless cores in four different molecular clouds: L1147/58, L1172/74, L1251 and L1228. We find that the core mass functions for each region typically show shallower-than-Salpeter behaviour. We find that L1147/58 and L1228 have a high ratio of starless cores to Class II protostars, while L1251 and L1174 have a low ratio, consistent with the latter regions being more active sites of current star formation, while the former are forming stars less actively. We determine that if modelled as thermally supported Bonnor-Ebert spheres, most of our cores have stable configurations accessible to them. We estimate the external pressures on our cores using archival 13CO velocity dispersion measurements and find that our cores are typically pressure confined, rather than gravitationally bound. We perform a virial analysis on our cores, and find that they typically cannot be supported against collapse by internal thermal energy alone, due primarily to the measured external pressures. This suggests that the dominant mode of internal support in starless cores in the Cepheus Flare is either non-thermal motions or internal magnetic fields. [ABSTRACT FROM AUTHOR]

Published
2017
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27. The JCMT and Herschel Gould Belt Surveys: a comparison of SCUBA-2 and Herschel data of dense cores in the Taurus dark cloud L1495.

Author

Ward-Thompson, D., Pattle, K., Kirk, J. M., Marsh, K., Buckle, J., Hatchell, J., Nutter, D. J., Griffin, M. J., Di Francesco, J., André, P., Beaulieu, S., Berry, D., Broekhoven-Fiene, H., Currie, M., Fich, M., Jenness, T., Johnstone, D., Kirk, H., Mottram, J., and Pineda, J.

Subjects
MOLECULAR clouds, DARK matter, SUBMILLIMETER astronomy, BOLOMETERS, SURFACE brightness (Astronomy), TELESCOPES
Abstract

We present a comparison of Submillimetre Common User Bolometer Array-2 (SCUBA-2) 850-μm and Herschel 70–500-μm observations of the L1495 filament in the Taurus Molecular Cloud with the goal of characterizing the SCUBA-2 Gould Belt Survey (GBS) data set. We identify and characterize starless cores in three data sets: SCUBA-2 850-μm, Herschel 250-μm, and Herschel 250-μm spatially filtered to mimic the SCUBA-2 data. SCUBA-2 detects only the highest-surface-brightness sources, principally detecting protostellar sources and starless cores embedded in filaments, while Herschel is sensitive to most of the cloud structure, including extended low-surface-brightness emission. Herschel detects considerably more sources than SCUBA-2 even after spatial filtering. We investigate which properties of a starless core detected by Herschel determine its detectability by SCUBA-2, and find that they are the core's temperature and column density (for given dust properties). For similar-temperature cores, such as those seen in L1495, the surface brightnesses of the cores are determined by their column densities, with the highest-column-density cores being detected by SCUBA-2. For roughly spherical geometries, column density corresponds to volume density, and so SCUBA-2 selects the densest cores from a population at a given temperature. This selection effect, which we quantify as a function of distance, makes SCUBA-2 ideal for identifying those cores in Herschel catalogues that are closest to forming stars. Our results can now be used by anyone wishing to use the SCUBA-2 GBS data set. [ABSTRACT FROM AUTHOR]

Published
2016
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28. Alignment in star-debris disc systems seen by Herschel

Author

Greaves, J. S., primary, Kennedy, G. M., additional, Thureau, N., additional, Eiroa, C., additional, Marshall, J. P., additional, Maldonado, J., additional, Matthews, B. C., additional, Olofsson, G., additional, Barlow, M. J., additional, Moro-Martin, A., additional, Sibthorpe, B., additional, Absil, O., additional, Ardila, D. R., additional, Booth, M., additional, Broekhoven-Fiene, H., additional, Brown, D. J. A., additional, Cameron, A. C., additional, Burgo, C. d., additional, Francesco, J. D., additional, Eisloffel, J., additional, Duchene, G., additional, Ertel, S., additional, Holland, W. S., additional, Horner, J., additional, Kalas, P., additional, Kavelaars, J. J., additional, Lestrade, J.- F., additional, Vican, L., additional, Wilner, D. J., additional, Wolf, S., additional, and Wyatt, M. C., additional

Published
2013
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29. VizieR Online Data Catalog: JCMT Gould Belt Survey: dense cores in Orion B (Kirk+, 2016)

Author

Kirk, H., Di Francesco, J., Doug Johnstone, Duarte-Cabral, A., Sadavoy, S., Hatchell, J., Mottram, J. C., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Rumble, D., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

30. VizieR Online Data Catalog: JCMT Gould Belt Survey: Serpens MWC 297 (Rumble+, 2015)

Author

Rumble, D., Hatchell, J., Gutermuth, R. A., Kirk, H., Buckle, J., Beaulieu, S. F., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Johnstone, D., Mottram, J. C., Nutter, D., Pattle, K., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Walker-Smith, S., Di, Francesco J., Hogerheijde, M. R., Ward-Thompson, D., Allen, L. E., Cieza, L. A., Dunham, M. M., Harvey, P. M., Stapelfeldt, K. R., Bastien, P., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Sadavoy, S., Holly Thomas, Tothill, N., Viti, S., White, G. J., Wilson, C. D., Wouterloot, J., Yates, J., and Zhu, M.

31. VizieR Online Data Catalog: JCMT Gould Belt Survey: W40 complex (Rumble+, 2016)

Author

Rumble, D., Hatchell, J., Pattle, K., Kirk, H., Wilson, T., Buckle, J., Berry, D. S., Broekhoven-Fiene, H., Currie, M. J., Fich, M., Jenness, T., Doug Johnstone, Mottram, J. C., Nutter, D., Pineda, J. E., Quinn, C., Salji, C., Tisi, S., Walker-Smith, S., Di, Francesco J., Hogerheijde, M. R., Ward-Thompson, D., Bastien, P., Bresnahan, D., Butner, H., Chen, M., Chrysostomou, A., Coude, S., Davis, C. J., Drabek-Maunder, E., Duarte-Cabral, A., Fiege, J., Friberg, P., Friesen, R., Fuller, G. A., Graves, S., Greaves, J., Gregson, J., Holland, W., Joncas, G., Kirk, J. M., Knee, L. B. G., Mairs, S., Marsh, K., Matthews, B. C., Moriarty-Schieven, G., Mowat, C., Rawlings, J., Richer, J., Robertson, D., Rosolowsky, E., Sadavoy, S., Thomas, H., Tothill, N., Viti, S., White, G. J., Wouterloot, J., Yates, J., and Zhu, M.

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