Statistics – Computation
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21712603m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #126.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Statistics
Computation
Scientific paper
We present evolutions of a model double white dwarf binary with a low initial mass ratio (q = 0.4). We vary both the initial depth of contact (and hence the initial mass transfer rate) as well as the numerical resolution in our Eulerian hydrodynamics code. At the highest resolution of about 47 million grid cells we find that the binary has an initially growing mass transfer rate that then declines as the binary separates through the 50 orbital periods of the simulation. The lower resolution run (evolved with about 3 million cells) of the same binary also shows evidence for stable mass transfer though the mass transfer rate is significantly higher - emphasizing the importance of numerical resolution in these simulations. In this presentation we quantify the convergence of mass transfer between donor and accretor and measure the exchange of angular momentum through orbit-averaged equations. This work has been supported in part by NASA Astrophysics Theory Program grant number NNX10AC72G. The computations were performed on Teragrid and LONI facilities.
Frank Jacki
Motl Patrick M.
Tohline Joel E.
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