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 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 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/* . 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)strw.leidenuniv.nl
(End) Mason Carney [Univ. Leiden], Patricia Vannier [CDS] 19-Mar-2018