J/MNRAS/453/4264 JCMT Plane Survey: l=30° field (Moore+, 2015)
The JCMT Plane Survey: early results from the l = 30° field.
Moore T.J.T., Plume R., Thompson M.A., Parsons H., Urquhart J.S.,
Eden D.J., Dempsey J.T., Morgan L.K., Thomas H.S., Buckle J., Brunt C.M.,
Butner H., Carretero D., Chrysostomou A., Devilliers H.M., Fich M.,
Hoare M.G., Manser G., Mottram J.C., Natario C., Olguin F., Peretto N.,
Polychroni D., Redman R.O., Rigby A.J., Salji C., Summers L.J., Berry D.,
Currie M.J., Jenness T., Pestalozzi M., Traficante A., Bastien P.,
Difrancesco J., Davis C.J., Evans A., Friberg P., Fuller G.A., Gibb A.G.,
Gibson S., Hill T., Johnstone D., Joncas G., Longmore S.N., Lumsden S.L.,
Martin P.G., Nguyen Luong Q., Pineda J.E., Purcell C., Richer J.S.,
Schieven G.H., Shipman R., Spaans M., Taylor A.R., Viti S., Weferling B.,
White G.J., Zhu M.
<Mon. Not. R. Astron. Soc., 453, 4264-4277 (2015)>
=2015MNRAS.453.4264M 2015MNRAS.453.4264M (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galactic plane ; Millimetric/submm sources ; Morphology
Keywords: surveys - stars: formation - ISM: clouds -
ISM: individual objects: W43 - submillimetre: ISM
Abstract:
We present early results from the JCMT (James Clerk Maxwell Telescope)
Plane Survey (JPS), which has surveyed the northern inner Galactic
plane between longitudes l=7° and l=63° in the 850-µm
continuum with SCUBA-2 (Submm Common-User Bolometer Array 2), as part
of the JCMT Legacy Survey programme. Data from the l=30° survey
region, which contains the massive-star-forming regions W43 and
G29.96, are analysed after approximately 40 percent of the
observations had been completed. The pixel-to-pixel noise is found to
be 19mJy/beam after a smooth over the beam area, and the projected
equivalent noise levels in the final survey are expected to be around
10mJy/beam. An initial extraction of compact sources was performed
using the FellWalker method, resulting in the detection of 1029
sources above a 5σ surface-brightness threshold. The
completeness limits in these data are estimated to be around
0.2Jy/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 APEX (Atacama Pathfinder Experiment)
Telescope Large Area Survey of the Galaxy (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.
Description:
JPS uses the wide-field submm-band bolometer camera SCUBA-2 (the Submm
Common-User Bolometer Array 2) in the 850um band at a spatial
resolution of 14.5-arcsec.
The 850um survey data presented in this paper cover the l=30°
field of the JPS and were observed between 2012 June and 2013 October.
The 11 tiles making up the field were observed on average three times
each. A strategy of minimum elevation limits for given atmospheric
opacity bands within the allocated range was adopted, in order to
minimize variations in the resulting noise in each repeated tile.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 85 1029 The JPS l=30° preliminary compact source
catalogue
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name derived from Galactic coordinates of the
maximum intensity in the source
(GLLL.lll+BB.bbb)
17- 22 F6.3 deg GLONmax Galactic longitude of maximum intensity in
the catalogue source
24- 29 F6.3 deg GLATmax Galactic latitude of maximum intensity in
the catalogue source
31- 36 F6.3 deg GLON Galactic longitude of emission centroid
38- 43 F6.3 deg GLAT Galactic latitude of emission centroid
45- 46 I2 arcsec amaj Semi-major size
48- 49 I2 arcsec bmin Semi-minor size
51- 53 I3 deg PA Position angle measured anticlockwise from
Galactic north
55- 56 I2 arcsec Reff Effective radius if source (1)
58- 62 F5.2 Jy/beam Speak Peak flux density at 850um
64- 68 F5.2 Jy/beam e_Speak rms uncertainty on Speak
70- 74 F5.2 Jy Sint Integrated flux density at 850um
76- 79 F4.2 Jy e_Sint rms uncertainty on Sint
81- 85 F5.1 --- SNR Signal-to-noise ratio
--------------------------------------------------------------------------------
Note (1): Reff=sqrt(A/π), where A is the area of the source above the
threshold.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Jun-2016