10 papers
Organic molecules in protoplanetary disks around TTauri and HerbigAe stars
Wing-Fai Thi, Gerd-Jan van Zadelhoff, Ewine F. van Dishoeck
The results of single-dish observations of low- and high-J transitions of selected molecules from protoplanetary disks around two TTauri stars (LkCa15 and TWHya) and two HerbigAe s…
Detection of DCO+ in a circumstellar disk
E. F. van Dishoeck, W. F. Thi, G. J. van Zadelhoff
We report the first detection of DCO+ in a circumstellar disk. The DCO+ J=5-4 line at 360.169 GHz is observed with the 15m James Clerk Maxwell Telescope in the disk around the pre-…
Interferometric Observations of Formaldehyde in the Protoplanetary Disk around LkCa15
Yuri Aikawa, Munetake Momose, Wing-Fai Thi +4
Emission from the line of HCO has been detected and marginally resolved toward LkCa15 by the Nobeyama Millimeter Array. The column density of HCO is higher…
Numerical methods for non-LTE line radiative transfer: Performance and convergence characteristics
G. -J. van Zadelhoff, C. P. Dullemond, F. F. S. van der Tak +7
Comparison is made between a number of independent computer programs for radiative transfer in molecular rotational lines. The test models are spherically symmetric circumstellar e…
Vertical structure models of T Tauri and Herbig Ae/Be disks
C. P. Dullemond, G. J. van Zadelhoff, A. Natta
In this paper we present detailed models of the vertical structure (temperature and density) of passive irradiated circumstellar disks around T Tauri and Herbig Ae/Be stars. In con…
Warm Molecular Layers in Protoplanetary Disks
Y. Aikawa, G. J. van Zadelhoff, E. F. van Dishoeck +1
We have investigated molecular distributions in protoplanetary disks, adopting a disk model with a temperature gradient in the vertical direction. The model produces sufficiently h…