129 citations · 248 across the 5 of their papers we have counts for
5 papers
Potential Vorticity Evolution of a Protoplanetary Disk with An Embedded Protoplanet
H. Li, S. Li, J. Koller +5
We present two-dimensional inviscid hydrodynamic simulations of a protoplanetary disk with an embedded planet, emphasizing the evolution of potential vorticity (the ratio of vortic…
Vortices in the Co-orbital Region of an Embedded Protoplanet
Josef Koller, Hui Li, Douglas N. C. Lin
We present global 2-D inviscid disk simulations with an embedded planet, emphasizing the non-linear dynamics in its co-orbital region. We find that the potential vorticity of the f…
The Anomalous Infrared Emission of Abell 58
Josef Koller, Stefan Kimeswenger
We present a new model to explain the excess in mid and near infrared emission of the central, hydrogen poor dust knot in the planetary nebula (PN) Abell 58. Current models disagre…
Modeling the Dust Shell of V4334 Sgr
S. Kimeswenger, J. Koller
The central star V4334 Sgr (Sakurai's Nova) of the planetary nebula PN G010.4+04.4 underwent in 1995-1996 the rare event of a very late helium flash. It is only one of two such eve…
New identification of the near infrared Source in the "born-again" planetary nebula A58 (=V605 Aql)
S. Kimeswenger, J. Koller, S. Schmeja
The central dust knot V605 Aql (= Nova Aql 1919) in the planetary nebula A58 is the result of a late-helium flash. Previous near infrared (NIR) measurements yield very bright fluxe…