J/ApJS/214/7 CO survey of molecular clouds. IV. NGC 1333 (Bieging+, 2014)
The Arizona Radio Observatory CO mapping survey of galactic molecular clouds:
IV. The NGC 1333 cloud in Perseus in CO J=2-1 and 13COJ=2-1.
Bieging J.H., Revelle M., Peters W.L.
<Astrophys. J. Suppl. Ser., 214, 7 (2014)>
=2014ApJS..214....7B 2014ApJS..214....7B
ADC_Keywords: Molecular clouds ; Radio lines ; Interstellar medium ; Surveys
Keywords: ISM: clouds; ISM: individual: NGC 1333;
ISM: kinematics and dynamics; ISM: molecules
Abstract:
We mapped the NGC 1333 section of the Perseus Molecular Cloud in the
J=2-1 emission lines of 12CO and 13CO over a 50'x60' region
(3.4x4.1pc at the cloud distance of 235pc), using the Arizona Radio
Observatory Heinrich Hertz Submillimeter Telescope. The angular
resolution is 38" (0.04pc) and velocity resolution is 0.3km/s. We
compare our velocity moment maps with known positions of young stellar
objects (YSOs) and (sub)millimeter dust continuum emission. The CO
emission is brightest at the center of the cluster of YSOs, but is
detected over the full extent of the mapped region at ≥10xrms. The
morphology of the CO channel maps shows a kinematically complex
structure, with many elongated features extending from the YSO cluster
outward by ∼1pc. One notable feature appears as a narrow serpentine
structure that curves and doubles back, with a total length of ∼3pc.
The 13CO velocity channel maps show evidence for many low-density
cavities surrounded by partial shell-like structures, consistent with
previous studies. Maps of the velocity moments show localized effects
of bipolar outflows from embedded YSOs, as well as a large-scale
velocity gradient around the central core of YSOs, suggestive of
large-scale turbulent cloud motions determining the location of
current star formation. The CO/13CO intensity ratios show the
distribution of the CO opacity, which exhibits a complex kinematic
structure. Identified YSOs are located mainly at the positions of
greatest CO opacity.
Description:
Observations were made with the Heinrich Hertz Submillimeter Telescope
(HHT) on Mt. Graham, AZ, at an elevation of 3200m. The J=2-1 lines of
the CO isotopologues 12C16O (230.5GHz) and 13C16O (220.4GHz)
were mapped over a 50'x60' field centered on the NGC 1333 reflection
nebula. The field to be mapped was divided into 5x6 subfields, each
10'x10' in size, plus a small overlap. Total scanning time per
subfield was 2hr. Observations were carried out in several observing
sessions from 2007 December to 2008 November.
The data cubes have an angular resolution of 38" (FWHM) and, on the
velocity axis, a resolution of 0.3km/s, spanning the range -15 to
+25km/s.
Objects:
-------------------------------------------------
RA (ICRS) DE Designation(s)
-------------------------------------------------
03 29 02 +31 20.9 NGC 1333 = NGC 1333
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fits.dat 159 2 List of the calibrated brightness temperature
image cubes of 12CO and 13CO J=2-1 in FITS format
fits/* . 2 Individual FITS file
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See also:
J/ApJS/209/39 : CO survey of molecular clouds. III. Serpens (Burleigh+, 2013)
J/ApJ/744/6 : Very low-mass objects in NGC1333 (Scholz+, 2012)
J/ApJS/196/18 : CO survey of molecular clouds. II. W3 (Bieging+, 2011)
J/ApJS/191/232 : CO survey of W51 molecular cloud. Paper I. (Bieging+, 2010)
J/AJ/140/266 : NGC 1333 X-ray luminous YSOs properties (Winston+, 2010)
J/AJ/136/1372 : Very low-mass YSOs in NGC 1333 (Oasa+, 2008)
J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)
J/ApJ/655/958 : 90-GHz observations in NGC 1333 (Walsh+, 2007)
Byte-by-byte Description of file: fits.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 arcsec/pix scale [10] Scale of the image
23- 25 I3 --- Nx [308] Number of pixels along X-axis
26 A1 --- --- [x]
27- 29 I3 --- Ny [361] Number of pixels along Y-axis
30 A1 --- --- [x]
31- 33 I3 --- Nz [133] Number of pixels along Z-axis
35- 44 A10 "date" DATE-OBS Observation date (YYYY-MM-DD)
46- 51 I6 m/s bVel [-14925] Lower limit of velocity
53- 57 I5 m/s BVel [24675] Upper limit of velocity
59- 61 I3 m/s dVel [300] Velocity increment
63- 67 I5 Kibyte size [57788] Size of FITS file
69- 85 A17 --- FileName Name of FITS file, in subdirectory fits
87-159 A73 --- Title Title of the map
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History:
From electronic version of the journal
References:
Bieging et al. Paper I. (W51) 2010ApJS..191..232B 2010ApJS..191..232B Cat. J/ApJS/191/232
Bieging & Peters Paper II. (W3) 2011ApJS..196...18B 2011ApJS..196...18B Cat. J/ApJS/196/18
Burleigh et al. Paper III. (Serpens) 2013ApJS..209...39B 2013ApJS..209...39B Cat. J/ApJS/209/39
(End) Emmanuelle Perret [CDS] 08-Oct-2014