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J/A+A/598/A76      Six infrared dark clouds multi-wavelength obs. (Zhang+, 2017)

A multi-wavelength observation and investigation towards six infrared dark clouds. Zhang C.-P., Yuan J.-H., Li G.-X., Zhou J.-J., Wang J.-J. <Astron. Astrophys. 598, A76 (2017)> =2017A&A...598A..76Z (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way - Interstellar medium ; Radio lines Keywords: infrared: stars - stars: formation - ISM: IRDCs - HII regions - radio lines: ISM Abstract: Infrared dark clouds (IRDCs) are ubiquitous in the Milky Way, yet they play a crucial role in breeding newly-formed stars. In order to further understand the dynamics, chemistry, and evolution of IRDCs, we carried out multi-wavelength observations towards a small sample. We performed new observations with the IRAM 30m and CSO 10.4m telescopes, with tracers HCO+, HCN, N2H+, C18O, DCO+, SiO, and DCN towards six IRDCs G031.97+00.07, G033.69-00.01, G034.43+00.24, G035.39-00.33, G038.95-00.47, and G053.11+00.05. Description: Towards six IRDCs G31, G33, G34, G35, G38, and G53, the HCO+ (1-0), HNC (1-0), N2H+ (1-0), and C18O (1-0) observations were carried out during December 2013 and April 2014 using the IRAM 30m telescope on Pico Veleta, Spain. Objects: -------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------- 18 49 33.7 -00 47 48 G31 = MSXDC G031.97+00.07 18 52 57.6 +00 42 59 G33 = MSXDC G033.69-00.01 18 53 18.9 +01 26 39 G34 = MSXDC G034.43+00.24 18 57 09.0 +02 07 46 G35 = MSXDC G035.39-00.33 19 04 08.3 +05 08 49 G38 = MSXDC G038.95-00.47 19 29 18.1 +17 54 33 G53 = MSXDC G053.11+00.05 -------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 127 47 Parameters (coordinate, distance, mass, density, etc.) of the selected cores in the IRDCs table3.dat 136 45 Gaussian fitting parameters (integrated intensity, velocity, FWHM, and intensity of HCO+, HNC, and C18O) with masking absorption dip towards the selected cores in the IRDCs table4.dat 85 6 Parameters of the detected DCO+, SiO, and DCN in the IRDCs list.dat 109 24 List of datacubes fits/* 0 24 Individual datacubes
See also: J/A+A/552/A40 : MSX high-contrast IRDCs with NH3 (Chira+, 2013) J/A+A/570/A51 : Molecular lines in 4 IRCS clumps (Shipman+, 2014) J/A+A/571/A53 : 4 IRDC data cubes (Beuther+, 2014) J/A+A/578/A29 : Column density maps in 4 IRDCs (Schneider+, 2015) J/A+A/579/A51 : Kinematic and thermal structure of IRDCs (Bihr+, 2015) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Core Core name (GNN-NN) (G1) 8- 9 I2 h RAh Right ascension (J2000) 11- 12 I2 min RAm Right ascension (J2000) 14- 17 F4.1 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 27 I2 arcsec DEs Declination (J2000) 29- 31 F3.1 kpc Dist Distance (2) 33- 36 F4.2 pc Rcore Code radius 38- 41 F4.1 K Tdust Dust temperature 43- 45 F3.1 K e_Tdust rms uncertainty on Tdust 47- 51 F5.2 Jy/beam I870um Integrated flux at 870um 53- 56 F4.2 Jy/beam e_I870um rms uncertainty on I870um 58- 62 F5.2 Jy S870um Flux density at 870um 64- 67 F4.2 Jy e_S870um rms uncertainty on S870um 69- 72 F4.2 km/s DVN2H+ N2H+ FWHM 74- 77 F4.2 km/s e_DVN2H+ rms uncertainty on DVN2H+ 79- 82 F4.2 --- tauN2H+ N2H+ optical depth 84- 87 F4.2 --- e_tauN2H+ rms uncertainty on tauN2H+ 89- 91 I3 Msun Mvir Virial mass 93- 94 I2 Msun e_Mvir rms uncertainty on Mvir 96- 99 I4 Msun M870um Mass at 870um 101-103 I3 Msun e_M870um rms uncertainty on M970um 105-108 I4 Msun M1.1mm ?=- Mass at 1.1mm 110-113 F4.2 --- alphaVir Virial alpha parameter (Mvir/M870um) 115-118 F4.2 --- e_alphaVir rms uncertainty on alphaVir 120-123 F4.1 10+4cm-3 n870um Volume density at 870um (M870um/(2Rcore)3)) 125-127 F3.1 10+4cm-3 e_n870um rms uncertainty on n870um
Note (2): The distances refer to the works from Rathborne et al. (2006, Cat. J/ApJ/641/389) and Simon et al. (2006, Cat. J/ApJ/653/1325).
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Core Code name (GNN-NN) (G1) 8- 12 F5.2 K.km/s SHCO+ HCO+ flux density 14- 17 F4.2 K.km/s e_SHCO+ rms uncertainty on SHCO+ 19- 24 F6.2 km/s VHCO+ HCO+ velocity 26- 29 F4.2 km/s e_VHCO+ rms uncertainty on VHCO+ 31- 35 F5.2 km/s DHCO+ HCO+ FWHM 37- 40 F4.2 km/s e_DHCO+ rms uncertainty on DHCO+ 42- 45 F4.2 K IHCO+ HCO+ integrated flux 47- 50 F4.2 K e_IHCO+ rms uncertainty on IHCO+ 52- 56 F5.2 K.km/s SHNC HNC flux density 58- 61 F4.2 K.km/s e_SHNC rms uncertainty on SHNC 63- 68 F6.2 km/s VHNC HNC velocity 70- 73 F4.2 km/s e_VHNC rms uncertainty on VHNC 75- 78 F4.2 km/s DHNC HNC FWHM 80- 83 F4.2 km/s e_DHNC rms uncertainty on DHNC 85- 88 F4.2 K IHNC HNC integrated flux 90- 93 F4.2 K e_IHNC rms uncertainty on IHNC 95- 99 F5.2 K.km/s SC18O C18O flux density 101-104 F4.2 K.km/s e_SC18O rms uncertainty on SC18O 106-111 F6.2 km/s VC18O C18O velocity 113-116 F4.2 km/s e_VC18O rms uncertainty on VC18O 118-121 F4.2 km/s DC18O C18O FWHM 123-126 F4.2 km/s e_DC18O rms uncertainty on DC18O 128-131 F4.2 K IC18O C18O integrated flux 133-136 F4.2 K e_IC18O rms uncertainty on IC18O
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Core Code name (GNN-NN) 8- 12 F5.2 km/s Vel Velocity 14- 17 F4.2 km/s e_Vel rms uncertainty on Velocity 19- 22 F4.2 km/s DV(DCO+) DCO+ FWHM 24- 27 F4.2 km/s e_DV(DCO+) rms uncertainty on DV(DCO+) 29- 33 F5.3 K TMB(DCO+) DCO+ main beam temperature 35- 39 F5.3 K e_TMB(DCO+) rms uncertainty on TMB(DCO+) 41- 45 F5.2 km/s DV(SiO) SiO FWHM 47- 50 F4.2 km/s e_DV(SiO) rms uncertainty on DV(SiO) 52- 56 F5.3 K TMB(SiO) SiO main beam temperature 58- 62 F5.3 K e_TMB(SiO) rms uncertainty on TMB(SiO) 64- 68 F5.2 km/s DV(DCN) ?=- DCN FWHM 70- 73 F4.2 km/s e_DV(DCN) ? rms uncertainty on DV(DCN) 75- 79 F5.3 K TMB(DCN) ?=- DCN main beam temperature 81- 85 F5.3 K e_TMB(DCN) ? rms uncertainty on TMB(DCN)
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000) 10- 18 F9.5 deg DEdeg Declination of center (J2000) 20- 21 I2 --- Nx Number of pixels along X-axis 23- 25 I3 --- Ny Number of pixels along Y-axis 27- 30 I4 --- Nz Number of slices 32- 42 F11.4 m/s bVel Lower value of velocity interval 44- 51 F8.1 m/s BVel Upper value of velocity interval 53- 59 F7.3 m/s dVel Velocity resolution 61- 65 I5 Kibyte size Size of FITS file 67- 80 A14 --- FileName Name of FITS file, in subdirectory fits 81-109 A29 --- Title Title of the FITS file
Global notes: Note (G1): The duplicated sources, e.g. G31-3, indicate that the corresponding spectra have two velocity components within core size.
Acknowledgements: Chuan Peng Zhang, zcp0507(at)gmail.com
(End) Patricia Vannier [CDS] 01-Dec-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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