J/ApJS/224/43 Planck cold clumps and cores in the 2nd quadrant (Zhang+, 2016)
Gas of 96 Planck cold clumps in the second quadrant.
Zhang T., Wu Y., Liu T., Meng F.
<Astrophys. J. Suppl. Ser., 224, 43-43 (2016)>
=2016ApJS..224...43Z 2016ApJS..224...43Z (SIMBAD/NED BibCode)
ADC_Keywords: Millimetric/submm sources ; Interstellar medium ; Radio lines
Keywords: ISM: clouds; ISM: kinematics and dynamics; ISM: structure;
stars: formation
Abstract:
Ninety-six Planck cold dust clumps in the second quadrant were mapped
with 12CO(1-0), 13CO(1-0), and C18O(1-0) lines at the 13.7m
telescope of Purple Mountain Observatory. 12CO(1-0) and 13CO(1-0)
emissions were detected for all 96 clumps, while C18O(1-0) emissions
were detected in 81 of them. Fifteen clumps have more than one
velocity component. In the 115 mapped velocity components, 225 cores
were obtained. We found that 23.1% of the cores have non-Gaussian
profiles. We acquired the Vlsr, FWHM, and TA of the lines.
Distances, Tex, velocity dispersions, NH2, and masses were also
derived. Generally, turbulence may dominant the cores because
σNT/σTherm>1 in almost all of the cores and Larson's
relationship is not apparent in our massive cores. Virial parameters
are adopted to test the gravitational stability of cores and 51% of
the cores are likely collapsing. The core mass function of the cores
in the range 0-1kpc suggests a low core-to-star conversional
efficiency (0.62%). Only 14 of 225 cores (6.2%) have associated
stellar objects at their centers, while the others are starless. The
morphologies of clumps are mainly filamentary structures. Seven clumps
may be located on an extension of the new spiral arm in the second
quadrant while three are on the known outer arm.
Description:
Observations of 96 Planck Cold Clumps in the second quadrant in the
J=1-0 12CO, 13CO, and C18O lines were carried out using the
13.7m telescope of Purple Mountain Observatory (PMO), Chinese Academy
of Sciences, during 2011 April-May and 2011 December-2012 January.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 96 Planck cold clumps in the second quadrant
table2.dat 133 225 Observed parameters of the J=1-0 lines of
12CO, 13CO and C18O
table3.dat 136 216 Parameters of the mapped cores
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See also:
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- PLCKECC Planck Cold Clump (GLLL.ll+BB.bb) (VIII/88/ecc)
15- 23 F9.5 deg GLON Galactic longitude
25- 34 F10.7 deg GLAT Galactic latitude
36- 37 I2 h RAh Hour of Right Ascension (J2000)
39- 40 I2 min RAm Minute of Right Ascension (J2000)
42- 46 F5.2 s RAs Second of Right Ascension (J2000)
48 A1 --- DE- Sign of the Declination (J2000)
49- 50 I2 deg DEd Degree of Declination (J2000)
52- 53 I2 arcmin DEm Arcminute of Declination (J2000)
55- 59 F5.2 arcsec DEs Arcsecond of Declination (J2000)
61- 62 I2 h RABh Hour of Right Ascension (B1950)
64- 65 I2 min RABm Minute of Right Ascension (B1950)
67- 71 F5.2 s RABs Second of Right Ascension (B1950)
73 A1 --- DEB- Sign of the Declination (B1950)
74- 75 I2 deg DEBd Degree of Declination (B1950)
77- 78 I2 arcmin DEBm Arcminute of Declination (B1950)
80- 83 F4.1 arcsec DEBs Arcsecond of Declination (B1950)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- PLCKECC Planck Cold Clump (GLLL.ll+BB.bb)
15- 15 A1 --- Sub [a-c] Sub Clump designation
17- 18 A2 --- Core Mapped Core designation (C1 to C5)
20- 25 F6.2 km/s Vlsr1 [-50.1/5.7] Centroid velocity, 12CO
27- 30 F4.2 km/s e_Vlsr1 [0/0.2] Uncertainty for Vlsr1
32- 35 F4.2 km/s FWHM1 [0.4/8.4] Gaussian FWHM, 12CO
37- 40 F4.2 km/s e_FWHM1 [0.01/0.2] Uncertainty for FWHM1
42- 46 F5.2 K Tr1 [1/14] Corrected brightness temperature, 12CO
48- 51 F4.2 K e_Tr1 [0.04/1] Uncertainty for Tr1
53- 58 F6.2 km/s Vlsr2 [-50/5.7] Centroid velocity, 13CO
60- 63 F4.2 km/s e_Vlsr2 [0/0.2] Uncertainty for Vlsr2
65- 68 F4.2 km/s FWHM2 [0.3/4] Gaussian FWHM, 13CO
70- 73 F4.2 km/s e_FWHM2 [0.01/0.3] Uncertainty for FWHM2
75- 78 F4.2 K Tr2 [0.7/8] Corrected brightness temperature,
13CO
80- 83 F4.2 K e_Tr2 [0.03/1] Uncertainty for Tr2
85- 90 F6.2 km/s Vlsr3 [-49.8/5.8]? Centroid velocity, C18O
92- 95 F4.2 km/s e_Vlsr3 [0.02/0.3]? Uncertainty for Vlsr3
97-100 F4.2 km/s FWHM3 [0.2/3.2]? Gaussian FWHM, C18O
102-105 F4.2 km/s e_FWHM3 [0.04/0.5]? Uncertainty for FWHM3
107-110 F4.2 K Tr3 [0.2/2.7]? Corrected brightness temperature,
C18O
112-115 F4.2 K e_Tr3 [0.03/0.3]? Uncertainty for Tr3, C18O
117-121 F5.2 km/s dV2 [-6.4/2.3] Profile asymmetry, 13CO
123-127 F5.2 km/s dV3 [-2.9/2.5]? Profile asymmetry, C18O
129-133 A5 --- Prof Profile comment(s) (1)
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Note (1): Profile comments as follows:
RP = red profile;
BP = blue profile;
W = wings;
BW = blue wing;
RW = red wing.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- PLCKECC Planck Cold Clump (GLLL.ll+BB.bb)
15- 15 A1 --- Sub [a-c] Sub Clump designation
17- 18 A2 --- Core Mapped Core designation (C1 to C5)
20- 24 F5.2 kpc Dist [0.07/28.7] Clump distance from the Sun
26- 29 I4 arcsec OffX Offset in X direction
31- 34 I4 arcsec OffY Offset in Y direction
36- 38 I3 arcsec SizeX [118/800] Deconvolved Size
40- 42 I3 arcsec SizeY [77/503] Deconvolved Size
44- 48 F5.2 pc Rad [0.04/22.4] Projected Radius
50- 53 F4.1 K Tex [5/17] Excitation temperature
55- 57 F3.1 K e_Tex [1/1.1] Uncertainty in Tex
59- 62 F4.2 --- tau [0.1/4.3] Optical depth, 13CO
64- 67 F4.2 --- e_tau [0.01/4] Uncertainty in tau
69- 72 F4.1 10+21cm-2 NH2 [0.6/37] Column density
74- 76 F3.1 10+21cm-2 e_NH2 [0.2/6]? Uncertainty in NH2
78- 81 F4.2 km/s sig [0.1/1.7] Thermal velocity dispersion
83- 86 F4.2 km/s e_sig [0/0.2] Uncertainty in dv
88- 91 F4.2 km/s sig-NT [0.1/0.3] Non-thermal velocity dispersion
93- 96 F4.2 km/s e_sig-NT [0] Uncertainty in dv-NT
98-101 F4.2 km/s sig-3D [0.3/3] Three-dimensional
velocity dispersion
103-106 F4.2 km/s e_sig-3D [0.01/0.2] Uncertainty in dv-3D
108-111 F4.1 10+3cm-3 n [0/24] Number density
113-118 I6 Msun Mlte [0/221794] LTE Mass
120-124 I5 Msun Mvir [10/33474] Virial Mass
126-129 I4 Msun Mjeans [8/4735] Jeans Mass
131-136 F6.2 --- alpha [0.03/141] Virial parameter, Mvir/Mlte
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 22-Jul-2016