GR1D
swMATH ID:  6190 
Software Authors:  Ott, C.D.; O'Connor, E. 
Description:  A new opensource code for spherically symmetric stellar collapse to neutron stars and black holes. We present the new opensource spherically symmetric generalrelativistic (GR) hydrodynamics code GR1D. It is based on the Eulerian formulation of GR hydrodynamics (GRHD) put forth by RomeroIbáñezGourgoulhon and employs radialgauge, polarslicing coordinates in which the 3+1 equations simplify substantially. We discretize the GRHD equations with a finitevolume scheme, employing piecewiseparabolic reconstruction and an approximate Riemann solver. GR1D is intended for the simulation of stellar collapse to neutron stars and black holes and will also serve as a testbed for modeling technology to be incorporated in multiD GR codes. Its GRHD part is coupled to various finitetemperature microphysical equations of state in tabulated form that we make available with GR1D. An approximate deleptonization scheme for the collapse phase and a neutrinoleakage/heating scheme for the postbounce epoch are included and described. We also derive the equations for effective rotation in 1D and implement them in GR1D. We present an array of standard test calculations and also show how simple analytic equations of state in combination with presupernova models from stellar evolutionary calculations can be used to study qualitative aspects of black hole formation in failing rotating corecollapse supernovae. In addition, we present a simulation with microphysical equations of state and neutrino leakage/heating of a failing corecollapse supernova and black hole formation in a presupernova model of a 40M ⊙ zeroage mainsequence star. We find good agreement on the time of black hole formation (within 20 
Homepage:  http://stellarcollapse.org/codes.html 
Keywords:  stellar collapse; numerical methods; black hole formation; GR1D code; protoneutron star; spinning black holes 
Related Software:  Einstein Toolkit; ZelmaniLeak; Spritz; ECHO; BRENT; WhiskyMHD; LORENE; SimFactory; Whisky; Carpet; GSL; Cactus; Kranc 
Cited in:  6 Publications 
Standard Articles
2 Publications describing the Software, including 2 Publications in zbMATH  Year 

A new opensource code for spherically symmetric stellar collapse to neutron stars and black holes. Zbl 1190.83064 O’Connor, Evan; Ott, Christian D. 
2010

Studies of stellar collapse and black hole formation with the opensource code GR1D. Zbl 1237.83028 Ott, C. D.; O’Connor, E. 
2010

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top 5
Cited by 26 Authors
Cited in 2 Serials
4  Classical and Quantum Gravity 
1  SIAM Journal on Scientific Computing 
Cited in 4 Fields
5  Relativity and gravitational theory (83XX) 
5  Astronomy and astrophysics (85XX) 
3  Fluid mechanics (76XX) 
1  Numerical analysis (65XX) 