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J/A+A/597/A25    IK Tau millimeter IRAM-30m line survey  (Velilla Prieto+, 2017)

The millimeter IRAM-30m line survey toward IK Tauri. Velilla Prieto L., Sanchez Contreras C., Cernicharo J., Agundez M., Quintana-Lacaci G., Bujarrabal V., Alcolea J., Balanca C., Herpin F., Menten K.M., Wyrowski F. <Astron. Astrophys. 597, A25 (2017)> =2017A&A...597A..25V (SIMBAD/NED BibCode)
ADC_Keywords: Stars, giant ; Spectroscopy Keywords: astrochemistry - line: identification - stars: abundances - stars: AGB and post-AGB - circumstellar matter - Abstract: We aim to investigate the physical and chemical properties of the molecular envelope of the oxygen-rich AGB star IK Tau. We carried out a millimeter wavelength line survey between ∼79 and 356GHz with the IRAM-30m telescope. We analysed the molecular lines detected in IK Tau using the population diagram technique to derive rotational temperatures and column densities. We conducted a radiative transfer analysis of the SO2 lines, which also helped us to verify the validity of the approximated method of the population diagram for the rest of the molecules. Description: These tables include the energy levels and polynomial coefficients needed to derive the rate coefficients of SO2. Each energy level in so2level.dat is uniquely identified by a identifier number used in the file so2pcoef.dat. File so2pcoef.dat contains polynomial coefficients that fit the decimal logarithm of the collisional rates between two levels computed by Balanca et al. (2016MNRAS.460.3766B). A sixth order polynomial reproduces with a relative error below 30% all rates between 20 and 1000K for the 410 energy levels used in the calculations. Objects: -------------------------------------------------- RA (ICRS) DE Designation(s) -------------------------------------------------- 03 53 28.87 +11 24 21.7 IK Tau = V* IK Tau -------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 118 2 List of fits spectra fits/* 0 2 Individual fits spectra so2level.dat 40 410 Energy levels so2pcoef.dat 98 83845 Polynomial coefficients
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- 25 I6 --- Nx Number of pixels along X-axis 27- 49 A23 --- Obs.Date Observation date (YYYY-MM-DDTHH:MM:SS.sss) 51- 58 F8.2 MHz bFREQ Lower value of frequency interval 60- 65 I6 MHz BFREQ Upper value of frequency interval 67- 74 F8.6 MHz dFREQ Spectral resolution 76- 79 I4 Kibyte size Size of FITS file 81- 96 A16 --- FileName Name of FITS file, in subdirectory fits 98-118 A21 --- Title Title of the FITS file
Byte-by-byte Description of file: so2level.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Id Identifier (number) of the level 10- 11 I2 --- J Quantum number J 16- 17 I2 --- Ka Quantum number Ka 22- 23 I2 --- Kc Quantum number Kc 27- 36 F10.6 K T Energy 39- 40 I2 --- g Degeneracy
Byte-by-byte Description of file: so2pcoef.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Idu Identifier (number) of the upper level 5- 7 I3 --- Idl Identifier (number) of the lower level 9- 20 E12.5 --- a0 Polynomial coefficient 0 (independent term) 22- 33 E12.5 --- a1 Polynomial coefficient 1 (a1*x) 35- 46 E12.5 --- a2 Polynomial coefficient 2 (a2*x^2) 48- 59 E12.5 --- a3 Polynomial coefficient 3 (a3*x^3) 61- 72 E12.5 --- a4 Polynomial coefficient 4 (a4*x^4) 74- 85 E12.5 --- a5 Polynomial coefficient 5 (a5*x^5) 87- 98 E12.5 --- a6 Polynomial coefficient 6 (a6*x^6)
Acknowledgements: Luis Velilla Prieto, lvelilla(at)icmm.csic.es
(End) Luis Velilla Prieto [ICMM-CSIC], Patricia Vannier [CDS] 06-Sep-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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