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A Unified Monte Carlo Treatment of Gas-Grain Chemistry for Large Reaction Networks. I. Testing Validity of Rate Equations in Molecular Clouds
A. I. Vasyunin, D. A. Semenov, D. S. Wiebe +1
In this study we demonstrate for the first time that the unified Monte Carlo approach can be applied to model gas-grain chemistry in large reaction networks. Specifically, we build…
Coagulation, fragmentation and radial motion of solid particles in protoplanetary disks
F. Brauer, C. P. Dullemond, Th. Henning
The growth of solid particles towards meter sizes in protoplanetary disks has to circumvent at least two hurdles, namely the rapid loss of material due to radial drift and particle…
Dust rings and filaments around the isolated young star V1331 Cygni
Sascha P. Quanz, Daniel Apai, Thomas Henning
We characterize the small and large scale environment of the young star V1331 Cygni with high resolution HST/WFPC2 and Digitized Sky Survey images. In addition to a previously know…
Ray-tracing for complex astrophysical high-opacity structures
J. Steinacker, A. Bacmann, Th. Henning
We present a ray-tracing technique for radiative transfer modeling of complex three-dimensional (3D) structures which include dense regions of high optical depth like in dense mole…
HST/NICMOS observations of a proto-brown dwarf candidate
D. Apai, L. V. Toth, Th. Henning +3
We present deep HST/NICMOS observations peering through the outflow cavity of the protostellar candidate IRAS 04381+2540 in the Taurus Molecular Cloud-1. A young stellar object as…
UYSO 1 - An Extremely Young Massive Stellar Object
J. Forbrich, K. Schreyer, B. Posselt +2
In the course of a comprehensive mm/submm survey of massive star-forming regions, a particularly interesting object has been found in the surroundings of the bright FIR source IRAS…