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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…
Detection of abundant solid CO in the disk around CRBR 2422.8-3423
W. F. Thi, K. M. Pontoppidan, E. F. van Dishoeck +2
We present direct evidence for CO freeze-out in a circumstellar disk around the edge-on class I object CRBR 2422.8-3423, observed in the M band with VLT-ISAAC at a resolving power…
Bright CO ro-vibrational emission lines in the class I source GSS 30 IRS1: Probing the inner disk of a young embedded star
K. M. Pontoppidan, F. L. Schoeier, E. F. van Dishoeck +1
We present a 4.5-4.85 micron R=5000 spectrum of the low mass class I young stellar object GSS 30 IRS1 (L=25L_sun) in the rho Ophiuchus core, observed with the infrared spectrometer…
Does IRAS 16293-2422 have a hot core? Chemical inventory and abundance changes in its protostellar environment
F. L. Schoeier, J. K. Jorgensen, E. F. van Dishoeck +1
A detailed radiative transfer analysis of the observed continuum and molecular line emission toward the deeply embedded young stellar object IRAS 16293-2422 is performed. The conti…
Chemistry as a probe of the structures and evolution of massive star forming regions
S. D. Doty, E. F. van Dishoeck, F. F. S. van der Tak +1
We present detailed thermal and gas-phase chemical models for the envelope of the massive star-forming region AFGL 2591. Time- and space-dependent chemistry are used to study the p…
Physical structure and CO abundance of low-mass protostellar envelopes
Jes K. Jorgensen, Fredrik L. Schoeier, Ewine F. van Dishoeck
We present 1D radiative transfer modelling of the envelopes of a sample of 18 low-mass protostars and pre-stellar cores with the aim of setting up realistic physical models, for us…