J/ApJS/209/37 Planck cold clumps in 12CO, 13CO and C18O (Meng+, 2013)
Mapping study of 71 Planck cold clumps in the Taurus, Perseus, and California
complexes.
Meng F., Wu Y., Liu T.
<Astrophys. J. Suppl. Ser., 209, 37 (2013)>
=2013ApJS..209...37M 2013ApJS..209...37M
ADC_Keywords: Molecular clouds ; Radio lines ; Interstellar medium
Keywords: Galaxy: structure - ISM: clouds - ISM: evolution -
ISM: kinematics and dynamics - ISM: molecules - stars: formation
Abstract:
A mapping study of 71 Planck cold clumps was made with 12CO(1-0),
13CO(1-0), and C18O(1-0) lines at the 13.7m telescope of Purple
Mountain Observatory. For all the clumps, 12CO(1-0) and 13CO(1-0)
emissions were detected, while for 55 of them, C18O(1-0) emissions
were detected. Of the 71 Clumps, 34 are in the Taurus Complex, 24 in
the California Complex, and 13 are in the Perseus Complex. In the 76
velocity components, 38 cores are found in 27 clumps; 19 of these
cores are in the Taurus Complex, 16 in the California Complex, and 3
in the Perseus Complex. We acquired Vlsr, TA and FWHM of lines.
Physical parameters including Tex, NH2, σTherm,
σNT, and σ3Dwere calculated. Generally, the cores are
of Tex=2-16K, NH2/cm2, and σ3D=0.2-1.0km/s. In the Taurus
Complex, the cores are less dense on average and have smaller
σThermthan the cores in the Perseus and California Complexes.
Two of the three cores in the Perseus Complex are revealed to have
larger Tex, NH2, and σ3D than the mean values in the other
two regions. Most of the cores have σNTlarger than
σTherm, suggesting a dominance of turbulence in our cores. The
majority of the cores have Mvir/MLTE{Gt} 1, which indicates these
cores are not bound and will disperse. By comparing our results with
the dust properties revealed by the Planck Early Release Cold Cores
Catalog, we investigated the coupling of gas and dust components. We
found that most of the cores have dust temperatures higher than their
gas temperatures. The stellar objects associated with our sources were
checked and 90% of the cores were found to be starless.
Description:
The J=1->0 12CO, 13CO, and C18O lines were observed using the
13.7m telescope of Qinghai Station of Purple Mountain Observatory from
January to May of 2011. The half-power beam size is 52"±3" (at
115.2GHz), the main beam efficiency is 50%, and both the pointing and
tracking accuracies are better than 5".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 74 Observed sources
table2.dat 123 38 Observed line parameters at the emission peaks
of 38 cores
table4.dat 138 38 Derived parameters of 38 dense cores
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011)
VIII/39 : Composite CO Survey of the Milky Way (Dame+ 1987)
J/ApJ/764/133 : Auriga-California giant molecular cloud (Harvey+, 2013)
J/ApJS/202/4 : Planck cold clumps survey in the Orion complex (Liu+, 2012)
J/ApJ/756/76 : Planck cold dust clumps CO survey (Wu+, 2012)
J/ApJS/186/259 : Taurus Spitzer survey: new candidate members (Rebull+, 2010)
J/MNRAS/402/603 : Properties of SCUBA cores in Perseus (Curtis+, 2010)
J/ApJ/720/480 : DISCS. I. Taurus protoplanetary disk data (Oberg+, 2010)
J/ApJ/684/1240 : Prestellar cores in Perseus, Serpens & Oph. (Enoch+, 2008)
J/A+A/487/993 : MAMBO Mapping of c2d Clouds and Cores (Kauffmann+, 2008)
J/A+A/472/187 : 12CO outflows towards Perseus submm cores (Hatchell+, 2007)
J/ApJ/668/1042 : Dense cores in Perseus molecular cloud (Kirk+, 2007)
J/A+A/440/151 : Observations at 850um in Perseus clusters (Hatchell+, 2005)
J/A+A/426/503 : Cat. of high velocity molecular outflows (Update) (Wu+ 2004)
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 Clump name (GLLL.ll+BB.bb) (Cat. VIII/88)
14 A1 --- f_PLCKECC [*] Flag on PLCKECC (1)
16- 24 F9.5 deg GLON [153/178] Galactic longitude
26- 36 F11.7 deg GLAT [-25/-5.1] Galactic latitude
38- 39 I2 h RAh Hour of right ascension (J2000)
41- 42 I2 min RAm Minute of right ascension (J2000)
44- 48 F5.2 s RAs Second of right ascension (J2000)
50 A1 --- DE- Sign of declination (J2000)
51- 52 I2 deg DEd Degree of declination (J2000)
54- 55 I2 arcmin DEm Arcminute of declination (J2000)
57- 61 F5.2 arcsec DEs Arcsecond of declination (J2000)
63- 64 I2 h RABh Hour of right ascension (B1950)
66- 67 I2 min RABm Minute of right ascension (B1950)
69- 73 F5.2 s RABs Second of right ascension (B1950)
75 A1 --- DEB- Sign of declination (B1950)
76- 77 I2 deg DEBd Degree of declination (B1950)
79- 80 I2 arcmin DEBm Arcminute of declination (B1950)
82- 86 F5.2 arcsec DEBs Arcsecond of declination (B1950)
88- 90 A3 --- Reg Region (G1)
92 A1 --- IR [Y/N] IRAC/MIPS detection?
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Note (1): Three clumps without suitable reference positions are marked with a
"*" and they are excluded in the analysis.
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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- 16 A16 --- Core Core name
18- 23 F6.2 km/s V12 [-19.2/7.4] 12CO centroid LSR velocity
25- 28 F4.2 km/s e_V12 [0/0.1] V12 uncertainty
30- 33 F4.2 km/s W12 [0.6/4.5] 12CO FWHM
35- 38 F4.2 km/s e_W12 [0.01/0.2] W12 uncertainty
40- 43 F4.2 K TA12 [2.3/5.8] 12CO antenna temperature (T*A)
45- 48 F4.2 K e_TA12 [0.06/0.8] TA12 uncertainty
50- 55 F6.2 km/s V13 [-19.1/7.5] 13CO centroid LSR velocity
57- 60 F4.2 km/s e_V13 [0/0.05] V13 uncertainty
62- 65 F4.2 km/s W13 [0.4/2.2] 13CO FWHM
67- 70 F4.2 km/s e_W13 [0.01/0.2] W13 uncertainty
72- 75 F4.2 K TA13 [0.9/5] 13CO antenna temperature (T*A)
77- 80 F4.2 K e_TA13 [0.04/0.6] TA13 uncertainty
82- 86 F5.2 km/s V18 [-7.6/19]? C18O centroid LSR velocity
88- 91 F4.2 km/s e_V18 [0.01/0.1]? V18 uncertainty
93- 96 F4.2 km/s W18 [0.3/1.4]? C18O FWHM
98-101 F4.2 km/s e_W18 [0.02/0.3]? W18 uncertainty
103-106 F4.2 K TA18 [0.2/1.9]? C18O antenna temperature (T*A)
108-111 F4.2 K e_TA18 [0.05/0.1]? TA18 uncertainty
113-119 A7 --- Prof Line profile (1)
121-123 A3 --- Reg Region (G1)
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Note (1): Line profile abbreviations as follows:
RA = red asymmetry;
BA = blue asymmetry;
RA+ = red profile;
BA+ = blue profile;
W = wings;
BW = blue wing;
RW = red wing;
De = possible depletion.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Core Core name (GLLL.ll+BB.bbaCN)
18- 23 F6.2 km/s Vlsr [-19.1/7.5] centroid LSR velocity
25- 28 I4 arcsec Xoff [-187/216] Offset along RA
30- 33 I4 arcsec Yoff [-352/137] Offset along DEC
35- 38 I4 arcsec Size1 Deconvolved size
39 A1 --- --- [x]
40- 42 I3 arcsec Size2 Deconvolved size
44- 48 F5.1 deg PA [-79/76] Position angle
50- 54 F5.3 pc Rad [0.02/0.6] Radius
56- 59 F4.1 K Tex [5.3/16.1] Excitation temperature
61- 63 F3.1 K e_Tex [0.2/1.6] Tex uncertainty
65- 68 F4.2 --- tau [0.2/1.9] 13CO optical depth
70- 73 F4.2 --- e_tau [0.01/0.2] tau uncertainty
75- 78 F4.1 10+21/cm2 NH2 [1/10.7] N(H2) column density
80- 82 F3.1 10+21/cm2 e_NH2 [0.3/2.6] NH2 uncertainty
84- 87 F4.2 km/s Vth [0.1/0.3] thermal velocity dispersion
(σTherm)
89- 93 F5.3 km/s e_Vth [0.003/0.02] Vth uncertainty
95- 98 F4.2 km/s Vnt [0.1/0.7] Non-thermal velocity dispersion
(σNT)
100-103 F4.2 km/s e_Vnt [0.02/0.2] Vnt uncertainty
105-108 F4.2 km/s V3D [0.3/1.2] Three-dimensional velocity
dispersion (σ3D)
110-113 F4.2 km/s e_V3D [0.02/0.3] V3D uncertainty
115-117 F3.1 10+3/cm3 nH2 [0.5/8] Volume density (n(H2))
119-125 F7.3 Msun MLTE [0.05/110] LTE mass
127-129 I3 Msun Mvir [3/410] Virial mass
131-134 F4.1 Msun MJ [2.9/98] Jeans mass
136-138 A3 --- Reg Region (CMC, PMC or TMC) (G1)
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Global notes:
Note (G1): Region as follows:
CMC = California molecular cloud; Lada et al. (2009ApJ...703...52L 2009ApJ...703...52L)
PMC = Perseus molecular cloud; (See Lombardi et al. 2010A&A...512A..67L 2010A&A...512A..67L)
TMC = Taurus molecular cloud
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Nomenclature note:
In tables 2 an 4, the cores are <[MWL2013] GLLL.ll+BB.bbaCN> in Simbad.
History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 27-Jan-2014