Yosef Zlochower

Associate Professor


Contact Information

OfficeLAC 2067
Phone(585) 475-6103
Emailyrzsma@rit.edu

Office Hours

Monday 10:00 am - 10:50 am, Wednesday 10:00 am - 11:50 am, Friday 10:00 am - 11:50 am.

Mailing Address

 
Dr. Yosef Zlochower

Center for Computational Relativity and Gravitation
Associate Professor
School of Mathematical Sciences
Rochester Institute of Technology

85 Lomb Memorial Drive

Rochester, NY 14623


RIT associate professor Yosef Zlochower received his PhD from the University of Pittsburgh
in 2002, and has spent the past decade studying numerical evolutions of black-hole
spacetimes. His work has mainly focused on numerical evolutions of multiple black hole
spacetimes. He was one of the principle developers of the breakthrough "moving punctures"
approach to evolving multiple black holes in full numerical relativity. He has since
spent his time studying black hole dynamics, including recoils, spin and orbital
precession, spin flips, and generating waveform templates for LIGO data analysis.

Research Interests

My main area of research involves developing numerical algorithms and using large-scale computer simulations to solve the Einstein Field Equations using higher-order finite-difference techniques.  These equations are non-linear second-order partial-differential equations for the metric-tensor. The metric-tensor is rank-2 tensor which contains all information about the geometry of the space time (i.e. the distance between nearby point, the angle between vectors, and most importantly for gravitational wave detectors, the radiation).  The Einstein Equations can be decomposed into two categories: (i) non-linear hyperbolic evolution equations that describe how the metric and its time derivative at one instant in time are related to future instances and (ii) non-linear elliptical equations that impose constraints on the possible forms of the metric and its time derivative on a given time slice. The main focus of my research has been in solving these hyperbolic and elliptical equations. Solving the Einstein Equations is further complicated by the `gauge freedom' in the theory. The metric itself is not given explicitly by the equations because one is always free to modify the coordinates -- and hence the metric --- and still end up with the same physical spacetime. To solve the equations one also needs to impose additional equations which fix the coordinates.  In addition, the equations must be re-written in a form that is well posed, otherwise attempts at solving the problem numerically will fail.


Selected Publications

http://inspirehep.net/search?ln=en&p=find+a+y.zlochower.1&of=hb&action_s...

 

1) Remnant mass, spin, and recoil from spin aligned black-hole binaries.
By James Healy, Carlos O. Lousto, Yosef Zlochower.
[arXiv:1406.7295 [gr-qc]].

2) Approximate black hole binary spacetime via asymptotic matching.
By Bruno C. Mundim, Hiroyuki Nakano, Nicolás Yunes, Manuela Campanelli, Scott C. Noble, Yosef Zlochower.
[arXiv:1312.6731 [gr-qc]].
10.1103/PhysRevD.89.084008.
Phys.Rev. D89 (2014) 084008.

3) Black hole binary remnant mass and spin: A new phenomenological formula.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1312.5775 [gr-qc]].
10.1103/PhysRevD.89.104052.
Phys.Rev. D89 (2014) 104052.

4) Where angular momentum goes in a precessing black hole binary.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1307.6237 [gr-qc]].
10.1103/PhysRevD.89.021501.
Phys.Rev. D89 (2014) 021501.

5) Error-analysis and comparison to analytical models of numerical waveforms produced by the NRAR Collaboration.
By Ian Hinder, Alessandra Buonanno, Michael Boyle, Zachariah B. Etienne, James Healy, Nathan K. Johnson-McDaniel, Alessandro Nagar, Hiroyuki Nakano et al..
[arXiv:1307.5307 [gr-qc]].
10.1088/0264-9381/31/2/025012.
Class.Quant.Grav. 31 (2014) 025012.

6) Exploring the Outer Limits of Numerical Relativity.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1304.3937 [gr-qc]].
10.1103/PhysRevD.88.024001.
Phys.Rev. D88 (2013) 2, 024001.

7) Nonlinear Gravitational Recoil from the Mergers of Precessing Black-Hole Binaries.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1211.7099 [gr-qc]].
10.1103/PhysRevD.87.084027.
Phys.Rev. D87 (2013) 8, 084027.

8) Accuracy Issues for Numerical Waveforms.
By Yosef Zlochower, Marcelo Ponce, Carlos O. Lousto.
[arXiv:1208.5494 [gr-qc]].
10.1103/PhysRevD.86.104056.
Phys.Rev. D86 (2012) 104056.

9) Circumbinary MHD Accretion into Inspiraling Binary Black Holes.
By Scott C. Noble, Bruno C. Mundim, Hiroyuki Nakano, Julian H. Krolik, Manuela Campanelli, Yosef Zlochower, Nicolas Yunes.
[arXiv:1204.1073 [astro-ph.HE]].
10.1088/0004-637X/755/1/51.
Astrophys.J. 755 (2012) 51.

10) Study of Conformally Flat Initial Data for Highly Spinning Black Holes and their Early Evolutions.
By Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower, Bruno C. Mundim, Manuela Campanelli.
[arXiv:1203.3223 [gr-qc]].
10.1103/PhysRevD.85.124013.
Phys.Rev. D85 (2012) 124013.

11) The NINJA-2 catalog of hybrid post-Newtonian/numerical-relativity waveforms for non-precessing black-hole binaries.
By P. Ajith, Michael Boyle, Duncan A. Brown, Bernd Brügmann, Luisa T. Buchman, Laura Cadonati, Manuela Campanelli, Tony Chu et al..
[arXiv:1201.5319 [gr-qc]].
10.1088/0264-9381/29/12/124001, 10.1088/0264-9381/30/19/199401.
Class.Quant.Grav. 29 (2012) 124001, Erratum-ibid. 30 (2013) 199401.

12) Gravitational Recoil From Accretion-Aligned Black-Hole Binaries.
By Carlos O. Lousto, Yosef Zlochower, Massimo Dotti, Marta Volonteri.
[arXiv:1201.1923 [gr-qc]].
10.1103/PhysRevD.85.084015.
Phys.Rev. D85 (2012) 084015.

13) Intermediate-mass-ratio black hole binaries II: Modeling Trajectories and Gravitational Waveforms.
By Hiroyuki Nakano, Yosef Zlochower, Carlos O. Lousto, Manuela Campanelli.
[arXiv:1108.4421 [gr-qc]].
10.1103/PhysRevD.84.124006.
Phys.Rev. D84 (2011) 124006.

14) Hangup Kicks: Still Larger Recoils by Partial Spin/Orbit Alignment of Black-Hole Binaries.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1108.2009 [gr-qc]].
10.1103/PhysRevLett.107.231102.
Phys.Rev.Lett. 107 (2011) 231102.

15) Binary Black Hole Waveform Extraction at Null Infinity.
By M.C. Babiuc, J. Winicour, Y. Zlochower.
[arXiv:1106.4841 [gr-qc]].
10.1088/0264-9381/28/13/134006.
Class.Quant.Grav. 28 (2011) 134006.

16) Hybrid black-hole binary initial data.
By Bruno C. Mundim, Bernard J. Kelly, Yosef Zlochower, Hiroyuki Nakano, Manuela Campanelli.
[arXiv:1012.0886 [gr-qc]].
10.1088/0264-9381/28/13/134003.
Class.Quant.Grav. 28 (2011) 134003.

17) A Characteristic Extraction Tool for Gravitational Waveforms.
By M.C. Babiuc, B. Szilagyi, J. Winicour, Y. Zlochower.
[arXiv:1011.4223 [gr-qc]].
10.1103/PhysRevD.84.044057.
Phys.Rev. D84 (2011) 044057.

18) Perturbative effects of spinning black holes with applications to recoil velocities.
By Hiroyuki Nakano, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower.
[arXiv:1011.2767 [gr-qc]].
10.1088/0264-9381/28/13/134005.
Class.Quant.Grav. 28 (2011) 134005.

19) Modeling Gravitational Recoil Using Numerical Relativity.
By Yosef Zlochower, Manuela Campanelli, Carlos O. Lousto.
[arXiv:1011.2210 [gr-qc]].
10.1088/0264-9381/28/11/114015.
Class.Quant.Grav. 28 (2011) 114015.

20) Modeling maximum astrophysical gravitational recoil velocities.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1011.0593 [gr-qc]].
10.1103/PhysRevD.83.024003.
Phys.Rev. D83 (2011) 024003.

21) Orbital Evolution of Extreme-Mass-Ratio Black-Hole Binaries with Numerical Relativity.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:1009.0292 [gr-qc]].
10.1103/PhysRevLett.106.041101.
Phys.Rev.Lett. 106 (2011) 041101.

22) Intermediate-mass-ratio black hole binaries: Intertwining numerical and perturbative techniques.
By Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower, Manuela Campanelli.
[arXiv:1008.4360 [gr-qc]].
10.1103/PhysRevD.82.104057.
Phys.Rev. D82 (2010) 104057.

23) Seeking for toroidal event horizons from initially stationary BH configurations.
By Marcelo Ponce, Carlos Lousto, Yosef Zlochower.
[arXiv:1008.2761 [gr-qc]].
10.1088/0264-9381/28/14/145027.
Class.Quant.Grav. 28 (2011) 145027.

24) Advances in Simulations of Generic Black-Hole Binaries.
By Manuela Campanelli, Carlos O. Lousto, Bruno C. Mundim, Hiroyuki Nakano, Yosef Zlochower, Hans-Peter Bischof.
[arXiv:1001.3834 [gr-qc]].
10.1088/0264-9381/27/8/084034.
Class.Quant.Grav. 27 (2010) 084034.

25) Intermediate Mass Ratio Black Hole Binaries: Numerical Relativity meets Perturbation Theory.
By Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower, Manuela Campanelli.
[arXiv:1001.2316 [gr-qc]].
10.1103/PhysRevLett.104.211101.
Phys.Rev.Lett. 104 (2010) 211101.

26) Post-Newtonian Initial Data with Waves: Progress in Evolution.
By Bernard J. Kelly, Wolfgang Tichy, Yosef Zlochower, Manuela Campanelli, Bernard F. Whiting.
[arXiv:0912.5311 [gr-qc]].
10.1088/0264-9381/27/11/114005.
Class.Quant.Grav. 27 (2010) 114005.

27) Statistical studies of Spinning Black-Hole Binaries.
By Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower, Manuela Campanelli.
[arXiv:0910.3197 [gr-qc]].
10.1103/PhysRevD.82.129902, 10.1103/PhysRevD.81.084023.
Phys.Rev. D81 (2010) 084023, Erratum-ibid. D82 (2010) 129902.

28) Status of NINJA: The Numerical INJection Analysis project.
By Benjamin Aylott, John G. Baker, William D. Boggs, Michael Boyle, Patrick R. Brady, Duncan A. Brown, Bernd Bruegmann, Luisa T. Buchman et al..
[arXiv:0905.4227 [gr-qc]].
10.1088/0264-9381/26/11/114008.
Class.Quant.Grav. 26 (2009) 114008.

29) Remnant Masses, Spins and Recoils from the Merger of Generic Black-Hole Binaries.
By Carlos O. Lousto, Manuela Campanelli, Yosef Zlochower, Hiroyuki Nakano.
[arXiv:0904.3541 [gr-qc]].
10.1088/0264-9381/27/11/114006.
Class.Quant.Grav. 27 (2010) 114006.

30) Testing gravitational-wave searches with numerical relativity waveforms: Results from the first Numerical INJection Analysis (NINJA) project.
By Benjamin Aylott, John G. Baker, William D. Boggs, Michael Boyle, Patrick R. Brady, Duncan A. Brown, Bernd Brugmann, Luisa T. Buchman et al..
[arXiv:0901.4399 [gr-qc]].
10.1088/0264-9381/26/16/165008.
Class.Quant.Grav. 26 (2009) 165008.

31) Comparison of Post-Newtonian and Numerical Evolutions of Black-Hole Binaries.
By Hiroyuki Nakano, Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower.
[arXiv:0901.3861 [gr-qc]].

32) Algebraic Classification of Numerical Spacetimes and Black-Hole-Binary Remnants.
By Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower.
[arXiv:0811.3006 [gr-qc]].
10.1103/PhysRevD.79.084012.
Phys.Rev. D79 (2009) 084012.

33) Comparison of Numerical and Post-Newtonian Waveforms for Generic Precessing Black-Hole Binaries.
By Manuela Campanelli, Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower.
[arXiv:0808.0713 [gr-qc]].
10.1103/PhysRevD.79.084010.
Phys.Rev. D79 (2009) 084010.

34) Modeling gravitational recoil from precessing highly-spinning unequal-mass black-hole binaries.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:0805.0159 [gr-qc]].
10.1103/PhysRevD.79.064018.
Phys.Rev. D79 (2009) 064018.

35) Extra-Large Remnant Recoil Velocities and Spins from Near-Extremal-Bowen-York-Spin Black-Hole Binaries.
By Sergio Dain, Carlos O. Lousto, Yosef Zlochower.
[arXiv:0803.0351 [gr-qc]].
10.1103/PhysRevD.78.024039.
Phys.Rev. D78 (2008) 024039.

36) Foundations of multiple black hole evolutions.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:0711.1165 [gr-qc]].
10.1103/PhysRevD.77.024034.
Phys.Rev. D77 (2008) 024034.

37) Close encounters of three black holes.
By Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower.
[arXiv:0710.0879 [gr-qc]].
10.1103/PhysRevD.77.101501.
Phys.Rev. D77 (2008) 101501.

38) Implementation of standard testbeds for numerical relativity.
By M.C. Babiuc, S. Husa, D. Alic, I. Hinder, C. Lechner, E. Schnetter, Bela Szilagyi, Y. Zlochower et al..
[arXiv:0709.3559 [gr-qc]].
10.1088/0264-9381/25/12/125012.
Class.Quant.Grav. 25 (2008) 125012.

39) Further insight into gravitational recoil.
By Carlos O. Lousto, Yosef Zlochower.
[arXiv:0708.4048 [gr-qc]].
10.1103/PhysRevD.77.044028.
Phys.Rev. D77 (2008) 044028.

40) Quasi-local linear momentum in black-hole binaries.
By Badri Krishnan, Carlos O. Lousto, Yosef Zlochower.
[arXiv:0707.0876 [gr-qc]].
10.1103/PhysRevD.76.081501.
Phys.Rev. D76 (2007) 081501.

41) A Practical formula for the radiated angular momentum.
By Carlos O. Lousto, Yosef Zlochower.
[gr-qc/0703061 [GR-QC]].
10.1103/PhysRevD.76.041502.
Phys.Rev. D76 (2007) 041502.

42) Maximum gravitational recoil.
By Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt.
[gr-qc/0702133 [GR-QC]].
10.1103/PhysRevLett.98.231102.
Phys.Rev.Lett. 98 (2007) 231102.

43) Large merger recoils and spin flips from generic black-hole binaries.
By Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, David Merritt.
[gr-qc/0701164].
10.1086/516712.
Astrophys.J. 659 (2007) L5-L8.

44) Comparisons of binary black hole merger waveforms.
By John G. Baker, Manuela Campanelli, Frans Pretorius, Yosef Zlochower.
[gr-qc/0701016].
10.1088/0264-9381/24/12/S03.
Class.Quant.Grav. 24 (2007) S25-S31.

45) Spin Flips and Precession in Black-Hole-Binary Mergers.
By Manuela Campanelli, Carlos O. Lousto, Yosef Zlochower, Badri Krishnan, David Merritt.
[gr-qc/0612076].
10.1103/PhysRevD.75.064030.
Phys.Rev. D75 (2007) 064030.

46) Spin-orbit interactions in black-hole binaries.
By Manuela Campanelli, C.O. Lousto, Yosef Zlochower.
[astro-ph/0608275].
10.1103/PhysRevD.74.084023.
Phys.Rev. D74 (2006) 084023.

47) Spinning-black-hole binaries: The orbital hang up.
By Manuela Campanelli, C.O. Lousto, Y. Zlochower.
[gr-qc/0604012].
10.1103/PhysRevD.74.041501.
Phys.Rev. D74 (2006) 041501.

48) The Last orbit of binary black holes.
By Manuela Campanelli, C.O. Lousto, Y. Zlochower.
[gr-qc/0601091].
10.1103/PhysRevD.73.061501.
Phys.Rev. D73 (2006) 061501.

49) Accurate evolutions of orbiting black-hole binaries without excision.
By Manuela Campanelli, C.O. Lousto, P. Marronetti, Y. Zlochower.
[gr-qc/0511048].
10.1103/PhysRevLett.96.111101.
Phys.Rev.Lett. 96 (2006) 111101.

50) Accurate black hole evolutions by fourth-order numerical relativity.
By Y. Zlochower, J.G. Baker, Manuela Campanelli, C.O. Lousto.
[gr-qc/0505055].
10.1103/PhysRevD.72.024021.
Phys.Rev. D72 (2005) 024021.

51) Gravitational wave extraction based on Cauchy-characteristic extraction and characteristic evolution.
By Maria Babiuc, Bela Szilagyi, Ian Hawke, Yosef Zlochower.
[gr-qc/0501008].
10.1088/0264-9381/22/23/011.
Class.Quant.Grav. 22 (2005) 5089-5108.

52) Mode coupling in the nonlinear response of black holes.
By Yosef Zlochower, Roberto Gomez, Sascha Husa, Luis Lehner, Jeffrey Winicour.
[gr-qc/0306098].
10.1103/PhysRevD.68.084014.
Phys.Rev. D68 (2003) 084014.

53) Retarded radiation from colliding black holes in the close limit.
By Sascha Husa, Yosef Zlochower, Roberto Gomez, Jeffrey Winicour.
[gr-qc/0108075].
10.1103/PhysRevD.65.084034.
Phys.Rev. D65 (2002) 084034.

54) Colliding black holes from a null point of view: The Close limit.
By Sascha Husa, Jeffrey Winicour, Manuela Campanelli, Roberto Gomez, Yosef Zlochower.
[gr-qc/0012110].

55) The Close limit from a null point of view: The Advanced solution.
By Manuela Campanelli, Roberto Gomez, Sascha Husa, Jeffrey Winicour, Yosef Zlochower.
[gr-qc/0012107].
10.1103/PhysRevD.63.124013.
Phys.Rev. D63 (2001) 124013.