J/AJ/141/43 Dust properties in LMC molecular clouds (Paradis+, 2011)
A statistical study of dust properties in Large Magellanic Cloud
molecular clouds.
Paradis D., Reach W.T., Bernard J.-P., Madden S., Dobashi K., Meixner M.,
Onishi T., Kawamura A., Fukui Y.
<Astron. J., 141, 43 (2011)>
=2011AJ....141...43P 2011AJ....141...43P
ADC_Keywords: Magellanic Clouds ; Molecular clouds ; Abundances
Keywords: dust, extinction - infrared: ISM - ISM: abundances - ISM: clouds -
Magellanic Clouds
Abstract:
The objective of this paper is to construct a catalog providing the
dust properties and the star formation efficiency (SFE) of the
molecular clouds in the Large Magellanic Cloud (LMC). We use the
infrared (IR) data obtained with the Spitzer Space Telescope as part
of the "Surveying the Agents of a Galaxy's Evolution" Legacy survey as
well as the IRAS data. We also work with extinction (Av) maps of the
LMC. A total of 272 molecular clouds have been detected in the LMC in
a previous molecular survey, accounting for 230 giant molecular clouds
(GMCs) and 42 smaller clouds. We perform correlations between the IR
emission/extinction and atomic and molecular gas tracers.
Description:
We use the Infrared Array Camera (IRAC) and the Multiband Imaging
Photometer for Spitzer (MIPS) on board Spitzer as well as the IRIS
(Improved Reprocessing of the IRAS Survey) data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 132 189 Results of the IR/HI correlation in the atomic phase
for all the molecular clouds
table2.dat 143 189 Results of the IR/CO correlation in the molecular
phase for all the molecular clouds
table3.dat 92 189 Residuals of the IR correlation for all the
molecular clouds
table4.dat 105 189 Dust properties in the atomic phase of the clouds
table5.dat 111 189 Dust properties in the molecular phase of the clouds
table7.dat 68 189 Molecular clouds luminosities and masses
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See also:
J/PASJ/53/971 : CO catalog of LMC molecular clouds (Mizuno+, 2001)
J/ApJS/178/56 : CO observations of LMC Giant Molecular clouds (Fukui+, 2008)
J/ApJ/705/144 : Molecular and atomic gas in the LMC. II. (Fukui+, 2009)
J/ApJS/184/1 : Molecular clouds in the LMC by NANTEN. II. (Kawamura+, 2009)
J/ApJS/197/16 : CO observations of LMC molecular clouds (MAGMA). (Wong+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 14 F5.1 deg DEdeg Declination in decimal degrees (J2000)
16- 19 F4.2 MJy/sr a160 The a(160um)/XHI correlation (G2)
21- 24 F4.2 MJy/sr e_a160 Uncertainty in a160
26- 29 F4.2 MJy/sr a100 The a(100um)/XHI correlation (G2)
31- 34 F4.2 MJy/sr e_a100 Uncertainty in a100
36- 39 F4.2 MJy/sr a70 ? The a(70um)/XHI correlation (G2)
41- 44 F4.2 MJy/sr e_a70 ? Uncertainty in a70
46 A1 --- l_a60 Limit flag on a60
47- 50 F4.2 MJy/sr a60 The a(60um)/XHI correlation (G2)
52- 55 F4.2 MJy/sr e_a60 ? Uncertainty in a60
57 A1 --- l_a25 Limit flag on a25
58- 61 F4.2 0.1MJy/sr a25 ? The a(25um)/XHI correlation (G2)
63- 66 F4.2 0.1MJy/sr e_a25 ? Uncertainty in a25
68 A1 --- l_a24 Limit flag on a24
69- 73 F5.2 0.1MJy/sr a24 The a(24um)/XHI correlation (G2)
75- 78 F4.2 0.1MJy/sr e_a24 ? Uncertainty in a24
80 A1 --- l_a12 Limit flag on a12
81- 84 F4.2 0.1MJy/sr a12 The a(12um)/XHI correlation (G2)
86- 89 F4.2 0.1MJy/sr e_a12 ? Uncertainty in a12
91- 94 F4.2 0.1MJy/sr a8 The a(8um)/XHI correlation (G2)
96- 99 F4.2 0.1MJy/sr e_a8 Uncertainty in a8
101 A1 --- l_a5.8 Limit flag on a5.8
102-105 F4.2 10kJy/sr a5.8 The a(5.8um)/XHI correlation (G2)
107-110 F4.2 10kJy/sr e_a5.8 ? Uncertainty in a5.8
112 A1 --- l_a4.5 Limit flag on a4.5
113-116 F4.2 kJy/sr a4.5 ? The a(4.5um)/XHI correlation (G2)
118-121 F4.2 kJy/sr e_a4.5 ? Uncertainty in a4.5
123 A1 --- l_a3.6 Limit flag on a3.6
124-127 F4.2 kJy/sr a3.6 The a(3.6um)/XHI correlation (G2)
129-132 F4.2 kJy/sr e_a3.6 ? Uncertainty in a3.6
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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- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 14 F5.1 deg DEdeg Declination in decimal degrees (J2000)
16- 19 F4.2 MJy/sr b160 The b(160um)/2XCO correlation (G2)
21- 24 F4.2 MJy/sr e_b160 Uncertainty in b160
26- 30 F5.2 MJy/sr b100 The b(100um)/2XCO correlation (G2)
32- 35 F4.2 MJy/sr e_b100 Uncertainty in b100
37 A1 --- l_b70 Limit flag on b70
38- 41 F4.2 MJy/sr b70 The b(70um)/2XCO correlation (G2)
43- 46 F4.2 MJy/sr e_b70 ? Uncertainty in b70
48 A1 --- l_b60 Limit flag on b60
49- 53 F5.2 MJy/sr b60 The b(60um)/2XCO correlation (G2)
55- 58 F4.2 MJy/sr e_b60 ? Uncertainty in b60
60 A1 --- l_b25 Limit flag on b25
61- 65 F5.2 0.1MJy/sr b25 The b(25um)/2XCO correlation (G2)
67- 70 F4.2 0.1MJy/sr e_b25 ? Uncertainty in b25
72 A1 --- l_b24 Limit flag on b24
73- 78 F6.2 10kJy/sr b24 ? The b(24um)/2XCO correlation (G2)
80- 84 F5.2 10kJy/sr e_b24 ? Uncertainty in b24
86 A1 --- l_b12 Limit flag on b12
87- 91 F5.2 10kJy/sr b12 The b(12um)/2XCO correlation (G2)
93- 96 F4.2 10kJy/sr e_b12 ? Uncertainty in b12
98 A1 --- l_b8 Limit flag on b8
99-103 F5.2 10kJy/sr b8 The b(8um)/2XCO correlation (G2)
105-108 F4.2 10kJy/sr e_b8 ? Uncertainty in b8
110 A1 --- l_b5.8 Limit flag on b5.8
111-114 F4.2 10kJy/sr b5.8 ? The b(5.8um)/2XCO correlation (G2)
116-119 F4.2 10kJy/sr e_b5.8 ? Uncertainty in b5.8
121 A1 --- l_b4.5 Limit flag on b4.5
122-126 F5.2 kJy/sr b4.5 ? The b(4.5um)/2XCO correlation (G2)
128-131 F4.2 kJy/sr e_b4.5 ? Uncertainty in b4.5
133 A1 --- l_b3.6 Limit flag on b3.6
134-138 F5.2 kJy/sr b3.6 ? The b(3.6um)/2XCO correlation (G2)
140-143 F4.2 kJy/sr e_b3.6 ? Uncertainty in b3.6
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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- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 14 F5.1 deg DEdeg Declination in decimal degrees (J2000)
16- 21 F6.2 MJy/sr c160 c(160um) correlation residual
23- 28 F6.2 MJy/sr c100 c(100um) correlation residual
30- 35 F6.2 MJy/sr c70 c(70um) correlation residual
37- 42 F6.2 MJy/sr c60 c(60um) correlation residual
44- 49 F6.2 0.1MJy/sr c25 c(25um) correlation residual
51- 57 F7.2 10kJy/sr c24 c(24um) correlation residual
59- 64 F6.2 10kJy/sr c12 c(12um) correlation residual
66- 71 F6.2 10kJy/sr c8 c(8um) correlation residual
73- 78 F6.2 10kJy/sr c5.8 c(5.8um) correlation residual
80- 85 F6.2 kJy/sr c4.5 c(4.5um) correlation residual
87- 92 F6.2 kJy/sr c3.6 c(3.6um) correlation residual
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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- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension (J2000)
10- 14 F5.1 deg DEdeg Declination (J2000)
16- 19 F4.2 --- XISRF Interstellar radiation field intensity
21- 24 F4.2 --- e_XISRF Uncertainty in XISRF
26- 30 F5.2 K Td Dust temperature
32- 36 F5.2 K e_Td Uncertainty in TdHI
38- 41 F4.2 0.1 Yvsg ? Very small grains abundance (G3)
43- 47 F5.2 0.1 e_Yvsg ? Uncertainty in Yvsg
49- 53 F5.2 10-2 YPAH PAH abundance (G3)
55- 59 F5.2 10-2 e_YPAH Uncertainty in YPAH
61- 66 F6.2 10-3 D/G Total dust abundance
68- 73 F6.2 10-3 e_D/G Uncertainty in D/G
75- 79 F5.2 10-25cm2 e160 Dust emissivity at 160 microns; cm^2/H
81- 86 F6.2 10-25cm2 e_e160 Uncertainty in e160
88- 92 F5.2 10-22mag.cm2 Av/NH ? Extinction to H column density ratio;
mag/(H/cm2) (G4)
94- 97 F4.2 10-22mag.cm2 e_Av/NH ? Uncertainty in Av/NH
99-105 F7.2 10-2mag Av0 Residual extinction
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension (J2000)
10- 14 F5.1 deg DEdeg Declination (J2000)
16- 19 F4.1 10+20s/cm2/km/K XCO XCO conversion factor; H/cm2/(K.km/s)
21- 25 F5.2 --- XISRF ? Interstellar radiation field intensity
27- 31 F5.2 --- e_XISRF ? Uncertainty in XISRF
33- 37 F5.2 K Td ? Dust temperature
39- 44 F6.2 K e_Td ? Uncertainty in TdCO
46- 50 F5.2 0.1 Yvsg ? Very small grains abundance (G3)
52- 57 F6.2 0.1 e_Yvsg ? Uncertainty in Yvsg
59- 63 F5.2 10-2 YPAH ? PAH abundance (G3)
65- 70 F6.2 10-2 e_YPAH ? Uncertainty in YPAH
72- 77 F6.2 10-3 D/G ? Total dust abundance
79- 85 F7.2 10-3 e_D/G ? Uncertainty in D/G
87- 91 F5.2 10-25cm2 e160 ? Dust emissivity at 160 microns; cm2/H
93- 98 F6.2 10-25cm2 e_e160 ? Uncertainty in e160
100-105 F6.2 10-22mag.cm2 Av/NH ? Extinction to H column density ratio
107-111 F5.2 10-22mag.cm2 e_Av/NH ? Uncertainty in Av/NH
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num Fukui et al. ([FKM2008]) cloud number (G1)
5- 8 F4.1 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 14 F5.1 deg DEdeg Declination in decimal degrees (J2000)
16- 19 F4.2 10+6Lsun LISRF Interstellar radiation field incident luminosity
21- 27 F7.2 10+4Lsun Ldust ? Total dust luminosity
29- 34 F6.2 10+4Lsun Lbg ? Big grain luminosity
36- 41 F6.2 10+4Lsun Lvsg ? Very small grain luminosity
43- 48 F6.2 10+3Lsun LPAH ? PAH luminosity
50- 55 F6.2 % Ratio1 ? Ldust to LISRF ratio
57- 62 F6.2 10+4Msun Mgas ? Gass mass
64- 68 F5.2 Lsun/Msun Ratio2 ? Ldust to Mgas ratio
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Global notes:
Note (G1): Fukui et al. (2008, Cat. J/ApJS/178/56) cloud number,
<[FKM2008] NNN> in Simbad
Note (G2): The correlation is defined by the formula
I(λ) = a(λ).(NHI+NX) + b(λ).NCO + c(λ)
where NHI, NX and NCO are the column densities in the atomic,
far-IR excess, and molecular phases respectively. The coefficients are
computed for 1020H/cm2. Results that could not be derived are blank.
Note (G3): Relative to big grains. A blank indicates negative parameter or
value that could not be derived.
Note (G4): A blank indicates negative parameter or value that could not be
derived.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 24-Jul-2012