J/A+A/361/1079 HNCO in massive galactic dense cores (Zinchenko, 2000)
HNCO in massive galactic dense cores
Zinchenko I., Henkel C., Mao R.Q.
<Astron. Astrophys. 361, 1079 (2000)>
=2000A&A...361.1079Z 2000A&A...361.1079Z
ADC_Keywords: Molecular clouds ; Radio lines
Keywords: stars: formation - ISM: clouds - ISM: molecules - radio lines: ISM
Description:
We surveyed 81 dense molecular cores associated with regions of
massive star formation and Sgr A in the J(K-1K1)=5(05)-4(04)
and 10(010)-9(09)_ lines of HNCO. Line emission was detected towards
57 objects. Selected subsamples were also observed in the
1(01)-0(00)_, 4(04)-3(03)_, 7(07)-6(06)_, 15(015)-14(014)_,
16(016)-15(015)_ and 21(021)-20(020)_ lines, covering a frequency
range from 22 to 461 GHz. HNCO lines from the K_(-1)=2,3 ladders were
detected in several sources. Towards Orion-KL, K_(-1)=5 transitions
with upper state energies E_u/k∼1100 and 1300K could be observed.
The tables contain the source lists and the results of these
SEST observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 45 56 Source list for SEST observations
table2.dat 51 27 Source list for Onsala observations
table5a.dat 82 57 C18O(2-1) data measured at SEST
table5b.dat 82 35 HNCO (10(010)-9(09)) data measured at SEST
table6a.dat 82 27 C18O(1-0) data measured at Onsala
table6b.dat 82 22 HNCO (5(05)-4(04)) data measured at Onsala
table7.dat 94 13 HNCO (10(2,9/8)-9(2,8/7)) data measured at SEST
table8.dat 81 5 HNCO (10(3,8/7)-9(3,7/6)) data measured at SEST
table9a.dat 82 7 HNCO (7(07)-6(06)) data measured at SEST
table9b.dat 82 7 HNCO (5(05)-4(04)) data measured at SEST
table10.dat 82 4 HNCO (4(04)-3(03)) data measured at Onsala
table11.dat 111 4 HNCO (1(01)-0(00)) data measured at Effelsberg
table12.dat 82 5 HNCO (15(015)-14(014)) data measured at HHT
table13.dat 82 7 HNCO (16(016)-15(015)) data measured at HHT
table14.dat 82 3 HNCO (21(021)-20(020)) data measured at HHT
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Table 3: Observing parameters (Δν is the spectral resolution)
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Molecule Transition Frequency Tel Δν Table
(MHz) (kHz)
--------------------------------------------------------------------------
HNCO 1(01)-0(00) 21981.460 Eff. 100m 12.5 11
HNCO 4(04)-3(03) 87925.252 OSO 20m 250 10
HNCO 5(05)-4(04) 109905.758 OSO 20m 250 6b
HNCO 5(05)-4(04) 109905.758 SEST 15m 86 9b
HNCO 7(07)-6(06) 153865.080 SEST 15m 86 9a
HNCO 10(010)-9(09) 219798.320 SEST 15m 86 5b
HNCO 15(015)-14(014) 329664.535 HHT 10m 480 12
HNCO 16(016)-15(015) 351633.457 HHT 10m 480 13
HNCO 21(021)-29(020) 461450.670 HHT 10m 480 14
HNCO 10(2,9)-9(2,8) 219733.850 SEST 15m 1400 7
HNCO 10(2,8)-9(2,7) 219737.193 SEST 15m 1400 7
HNCO 10(3,8/7)-9(3,7/6) 219656.710 SEST 15m 1400 8
C18O 1-0 109782.160 OSO 20m 1000 6a
C18O 2-1 219560.319 SEST 15m 1400 5a
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Table 4: Frequencies and spectral resolutions for the
observed K1>0 transitions
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Transition Frequency Δν
(MHz) (kHz)
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HNCO 10(2,9)-9(2,8) 219733.850 1400
HNCO 10(2,8)-9(2,7) 219737.193 1400
HNCO 10(3,8)-9(3,7) 219656.710 1400
HNCO 10(3,7)-9(3,6) 219656.710 1400
HNCO 10(4,7)-9(4,6) 219547.082 1400
HNCO 10(4,6)-9(4,5) 219547.095 1400
HNCO 10(5,6)-9(5,5) 219392.412 1400
HNCO 10(5,5)-9(5,4) 219392.412 1400
HNCO 15(2,14)-14(2,13) 329573.46 480
HNCO 15(2,13)-14(2,12) 329585.09 480
HNCO 21(2,20)-20(2,19) 461336.93 480
HNCO 21(2,19)-20(2,18) 461368.88 480
HNCO 21(3,18)-20(3,17) 461182.51 480
HNCO 21(3,19)-20(3,18) 461182.45 480
HNCO 21(4,17)-20(4,16) 460950.89 480
HNCO 21(4,18)-20(4,17) 460950.89 480
HNCO 21(5,16)-20(5,15) 460625.75 480
HNCO 21(5,17)-20(5,16) 460625.75 480
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Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Name
14- 15 A2 --- n_Name Note on Name (1)
17- 18 I2 h RAh Right ascension (1950)
20- 21 I2 min RAm Right ascension (1950)
23- 26 F4.1 s RAs Right ascension (1950)
28 A1 --- DE- Declination sign (1950)
29- 30 I2 deg DEd Declination (1950)
32- 33 I2 arcmin DEm Declination (1950)
35- 36 I2 arcsec DEs Declination (1950)
38- 51 A14 --- Rem Remarks
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Note (1): a: also observed in Effelsberg
b: also observed with HHT
c: also observed in Onsala
d: also observed in SEST
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Byte-by-byte Description of file: table[569][ab].dat table1[0234].dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 16 I3 arcsec DRA Offset in right ascension
18- 20 I3 arcsec DDE Offset in declination
22- 25 A4 --- Mol Molecule HCNO or C18O
27- 36 F10.3 MHz Freq Frequency of line
38- 43 F6.2 K.km/s INT Integrated intensity
45- 48 F4.2 K.km/s e_INT Uncertainty in integrated intensity
50- 54 F5.2 K Tmb Antenna temperature
56- 59 F4.2 K e_Tmb Uncertainty in Tmb
61- 66 F6.2 km/s VLSR VLSR
68- 71 F4.2 km/s e_VLSR Uncertainty in VLSR
73- 77 F5.2 km/s DV Line width
79- 82 F4.2 km/s e_DV Uncertainty in line width
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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- 12 A12 --- Name Source name
14- 16 I3 arcsec DRA Offset in right ascension
18- 20 I3 arcsec DDE Offset in declination
22- 25 A4 --- Mol Molecule HCNO or C18O
27- 36 F10.3 MHz Freq Frequency of line
38- 42 F5.2 K.km/s INT Line integrated intensity
44- 47 F4.2 K.km/s e_INT Uncertainty in line integrated intensity
49- 53 F5.3 K Tmb1 (10(29)-9(28)) antenna temperature Tmb
55- 59 F5.3 K e_Tmb1 Uncertainty in Tmb(10(29)-9(28))
61- 65 F5.3 K Tmb2 (10(28)-9(27)) antenna temperature Tmb
67- 71 F5.3 K e_Tmb2 Uncertainty in Tmb(10(28)-9(27))
73- 78 F6.2 MHz DF F(10(29)-9(28))-F(10(010)-9(09))
80- 83 F4.2 MHz e_DF Uncertainty in F(10(29)-9(28))-F(10(010)-9(09))
85- 89 F5.2 km/s DV Line width
91- 94 F4.2 km/s e_DV Uncertainty in line width
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 16 I3 arcsec DRA Offset in right ascension
18- 20 I3 arcsec DDE Offset in declination
22- 25 A4 --- Mol Molecule HCNO or C18O
27- 36 F10.3 MHz Freq Frequency of line
38- 41 F4.2 K.km/s INT Line integrated intensity
43- 46 F4.2 K.km/s e_INT Uncertainty in line integrated intensity
48- 52 F5.3 K Tmb (10(38/7)-9(37/6)) antenna temperature Tmb
54- 58 F5.3 K e_Tmb Uncertainty in Tmb(10(38/7)-9(37/6))
60- 66 F7.2 MHz DF F(10(38/7)-9(37/6))-F(10(010)-9(09))
68- 71 F4.2 MHz e_DF F(10(38/7)-9(37/6))-F(10(010)-9(09)) uncertainty
73- 76 F4.2 km/s DV Line width
78- 81 F4.2 km/s e_DV Uncertainty in line width
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 16 I3 arcsec DRA Offset in right ascension
18- 20 I3 arcsec DDE Offset in declination
22- 25 A4 --- Mol Molecule HCNO or C18O
27- 36 F10.3 MHz Freq Frequency of line
38- 43 F6.3 K.km/s INT 1(01)-0(00) integrated intensity
45- 49 F5.3 K.km/s e_INT Uncertainty in integrated intensity
51- 55 F5.3 K Tmb2-1 (F=2-1) antenna temperature Tmb
57- 61 F5.3 K e_Tmb2-1 Uncertainty in Tmb(F=2-1)
63- 67 F5.3 K Tmb1-1 (F=1-1) antenna temperature Tmb
69- 73 F5.3 K e_Tmb1-1 Uncertainty in Tmb(F=1-1)
75- 79 F5.3 K Tmb0-1 (F=0-1) antenna temperature Tmb
81- 85 F5.3 K e_Tmb0-1 Uncertainty in Tmb(F=0-1)
87- 92 F6.3 km/s VLSR VLSR(1(01)-0(00))
94- 98 F5.3 km/s e_VLSR Uncertainty in VLSR(1(01)-0(00))
100-105 F6.3 km/s DV 1(01)-0(00) line width
107-111 F5.3 km/s e_DV Uncertainty in line width
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Acknowledgements: Igor Zinchenko
(End) Patricia Bauer [CDS] 12-Jul-2000