J/A+A/597/A25IK 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 ; SpectroscopyKeywords: 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 SO_{2}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 SO_{2}. 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

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