Showing astro-phShow all
3 papers · 1 filter
astro-ph2005
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…
astro-ph2001
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…
astro-ph2000
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…