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J/A+A/614/A106   Probing midplane structure with DCO+ in HD169142 (Carney+ 2018)

Probing midplane CO abundance and gas temperature with DCO+ in the protoplanetary disk around HD 169142. Carney M.T., Fedele D., Hogerheijde M.R., Favre C., Walsh C., Bruderer S., Miotello A., Murillo N.M., Klaassen P.D., Henning Th., van Dishoeck E.F. <Astron. Astrophys. 614, A106 (2018)> =2018A&A...614A.106C (SIMBAD/NED BibCode)
ADC_Keywords: YSOs ; Protostars Keywords: astrochemistry - submillimeter: planetary systems - protoplanetary disks Abstract: We analyze the radial distribution of DCO+ in the protoplanetary disk around HD 169142, a Herbig Ae type star, with the aim of determining possible formation scenarios of DCO+. Using a simple chemical model, we investigate the effect of gas-phase CO abundance and gas temperature on the production of DCO+ near the disk midplane. Model fits to the DCO+ radial profile suggest a much colder disk midplane than the disk physical structure obtained from the literature. Description: The FITS files contain data cubes for DCO+ (J=3-2), C18O (J=2-1), and a 2D image of the 1.3mm (233GHz) continuum. The observations were taken with the Atacama Large Millimeter/submillimeter Array (ALMA). The data have a spatial resolution of 0.3". The C18O and continuum data have been previously published in Fedele, et al (2017A&A...600A..72F). Objects: ---------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------- 18 24 29.78 -29 46 49.32 HD 169142 = EM* MWC 925 ---------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 142 3 List of fits datacubes and image fits/* 0 3 Individual fits datacubes and image
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- 23 F4.2 arcsec/pix Scale [0.05] Scale of the image 25- 27 I3 --- Nx [256] Number of pixels along X-axis 29- 31 I3 --- Ny [256] Number of pixels along Y-axis 33- 35 I3 --- Nz [1/400] Number of channels along Z-axis 37- 62 A26 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.ssssss) 64- 70 F7.3 km/s bVel [-9.9/-9.7]? Lower value of velocity interval 72- 77 F6.3 km/s BVel [23.816/24.015]? Upper value of velocity interval 79- 83 F5.3 km/s dVel [0.084/0.085]? Velocity resolution 85- 92 F8.4 GHz Freq [216/233] Rest frequency of line/continuum 94- 99 I6 Kibyte size [309/102442] Size of the FITS file 101-125 A25 --- FileName Name of FITS file in subdirectory fits 126-142 A17 --- Title Title of the file
Acknowledgements: Mason Carney, masoncarney(at)
(End) Mason Carney [Univ. Leiden], Patricia Vannier [CDS] 19-Mar-2018
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