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

Moore, TJT and Plume, R and Thompson, MA and Parsons, H and Urquhart, JS and Eden, DJ and Dempsey, JT and Morgan, LK and Thomas, HS and Buckle, J and Brunt, CM and Butner, H and Carretero, D and Chrysostomou, A and deVilliers, HM and Fich, M and Hoare, MG and Manser, G and Mottram, JC and Natario, C and Olguin, F and Peretto, N and Polychroni, D and Redman, RO and Rigby, AJ and Salji, C and Summers, LJ and Berry, D and Currie, MJ and Jenness, T and Pestalozzi, M and Traficante, A and Bastien, P and diFrancesco, J and Davis, CJ and Evans, A and Friberg, P and Fuller, GA and Gibb, AG and Gibson, SJ and Hill, T and Johnstone, D and Joncas, G and Longmore, SN and Lumsden, SL and Martin, PG and Luong, QN and Pineda, JE and Purcell, C and Richer, JS and Schieven, GH and Shipman, R and Spaans, M and Taylor, AR and Viti, S and Weferling, B and White, GJ and Zhu, M (2015) The JCMT Plane Survey: early results from the l = 30 degree field. Monthly Notices of the Royal Astronomical Society, 453 (4). pp. 4264-4277. ISSN 0035-8711

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Abstract

We present early results from the JCMT Plane Survey (JPS), which has surveyed the northern inner Galactic plane between longitudes l=7 and l=63 degrees in the 850-{\mu}m continuum with SCUBA-2, as part of the James Clerk Maxwell Telescope Legacy Survey programme. Data from the l=30 degree survey region, which contains the massive star-forming regions W43 and G29.96, are analysed after approximately 40% of the observations had been completed. The pixel-to-pixel noise is found to be 19 mJy/beam, after a smooth over the beam area, and the projected equivalent noise levels in the final survey are expected to be around 10 mJy/beam. An initial extraction of compact sources was performed using the FellWalker method resulting in the detection of 1029 sources above a 5-{\sigma} surface-brightness threshold. The completeness limits in these data are estimated to be around 0.2 Jy/beam (peak flux density) and 0.8 Jy (integrated flux density) and are therefore probably already dominated by source confusion in this relatively crowded section of the survey. The flux densities of extracted compact sources are consistent with those of matching detections in the shallower ATLASGAL survey. We analyse the virial and evolutionary state of the detected clumps in the W43 star-forming complex and find that they appear younger than the Galactic-plane average.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record MNRAS (November 11, 2015) 453 (4): 4264-4277 is available online at:http://dx.doi.org/10.1093/mnras/stv1833
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 09 Sep 2015 09:16
Last Modified: 27 Nov 2015 12:59
URI: http://researchonline.ljmu.ac.uk/id/eprint/1978

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