NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Computing supernova collapse to neutron stars and black holesWe present a new numerical code for spherical hydrodynamics in general relativity. The code can handle gravitational collapse to a neutron star or to a black hole without the appearance of singularities. Moreover, the variables and equations in the code are very similar to those appearing in traditional Lagrangian supernova codes. Any such existing code can thus be easily adapted to treat collapse where the final fate is uncertain and may be either a neutron star or a black hole. The code is based on the formulation of Hernandez & Misner, in which retarded time is used as coordinate. This prevents the computational grid from penetrating inside any black hole that may form. We present the equations and a complete finite difference scheme for the adiabatic evolution of a fluid that obeys a gamma-law equation of state. We summarize the results of several testbed calculations performed to check our code. We also give the transformation of the analytic Oppenheimer-Snyder solution for homogeneous dust collapse to our coordinate system.
Document ID
19950054622
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Baumgarte, Thomas W.
(Cornell University Ithaca, NY, United States)
Shapiro, Stuart L.
(Cornell University Ithaca, NY, United States)
Teukolsky, Saul A.
(Cornell University Ithaca, NY, United States)
Date Acquired
August 16, 2013
Publication Date
April 20, 1995
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 443
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A86221
Funding Number(s)
CONTRACT_GRANT: NSF PHY-90-07834
CONTRACT_GRANT: NAGW-2364
CONTRACT_GRANT: NSF AST-91-19475
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available