Stellar Hydrodynamics
Stellar hydrodynamics - convection
Stellar hydrodynamics - common envelope
Stellar hydrodynamics - convection
- Collaborators:
- Bernd Freytag (Uppsala University, Sweden), Robert M Hueckstaedt, Frank Timmes (LANL)
- Paul Woodward, David Porter (University of Minnesota)
- ApJ paper 2006: Hydrodynamics of He-shell flash convection.
- Movies 2D He-shell flash convection, RAGE simulation:
Stellar hydrodynamics - common envelope
I am interested in common envelope evolution because of two main
reasons. First, a number of stellar observations seem to be
explainable only in terms of CE evoluiton. Secondly, CE evolution as a
particular fate of binary systems play an important role in population
synthesis simulations. These in turn can be used to study the
evolutionary origin of important stelar phenomena, like the SN Type
Ia, novae or H-deficient post-AGB stars, like the PG1159
stars. Currently I am involved in three different projects related to
CE evolution (obviously some of these are at a very early stage =
planning stage):
- with Steven Diehl, Chris Fryer, Gabriel Rockefeller (LANL) and
Pierre Maxted (Keele University) we are studying a particular binary
system containing the He-core white dwarf WD0137-349 with an orbiting
brown dwarf. The system parameters are extremely well observed, and
our main goal is to use this system for validating our simulations. If
this succeeds we can then extend the parameter space of our
simulations to create badly needed realistic input on the ejection
efficiency in CE evolution for population synthesis. Have a
look here for initial results.
- with Geoff Clayton and Chris Fryer, Steven Diehl we investigate
the possible double-degenerate merger progenitors of hydrogen-deficient carbon star with extremely large
excess of 18O, like HD 137613.
- Orsola DeMarco (AMNH) etal ... more here later.
T-6,
FHerwig@lanl.gov, tel: +1-505-667-0452,
Last update :Thu Sep 7 10:26:16 MDT 2006