2008 International Summer School on
Computational Methods in Gravitation and Astrophysics



July 28 ~ August 1, 2008
APCTP Headquarters, Pohang, Korea
Lecturers Local Organizing Committees Registration Program Lecture Note Lecture plans Information
Last update: July 22 2008
  Supporting Organizations
APCTP (Asia Pacific Center for Theoretical Physics)
KISTI (Korea Institute for Science and Technology Information)
 
  Invited Lecturers
Luca Baiotti (Tokyo University)
Dale Choi (Korea Institute for Science and Technology Information (KISTI))
Guillaume Faye (Institut d'Astrophysique de Paris)
Gaby Gonzalez (LIGO Scientific Collaboration & Louisiana State University)
Eric Gourgoulhon (Laboratoire Univers et Theories (LUTH))
Masaru Shibata (Tokyo University)
   
  Topics in lectures
 
L. Baiotti (Tokyo U.) : Numerical solution of the hydrodynamics equations: an introduction to High-Resolution Shock-Capturing methods and the Whisky code
D. Choi (KISTI) : Binary black hole coalescences
G. Faye (IAP) : Gravitational wave physics, Post Newtonian calculations
G. Gonzalez (LSU) : LIGO physics
E. Gourgoulhon (LUTH) : 3+1 formalism, initial data problem, and trapping horizons
M. Shibata (Tokyo U.)
: Astrophysical sources, basic equations for hydro and MHD, important physical process, and some of recent works
   
  Local Organizing Committees
 

Inyong Cho (Sungkyunkwan U), Dae-Il Choi (KISTI), Gungwon Kang (KISTI),
Hee Il Kim (SNU), Sang Pyo Kim (Kunsan Nat'l U), Chang-Hwan Lee (Pusan Nat'l U), Hyung Mok Lee (SNU), Hyung Won Lee (Inje U), Sang Min Lee (KISTI),
Masaru Shibata (Tokyo U)

   
  Registration
 
Registration fee is free.
The deadline was over (e.g., June 30, 2008), but those who still want to participate in this summer school should contact with Dr. Gungwon Kang (gwkang@kisti.re.kr) or Dr. Dale Choi (dalechoi@kisti.re.kr).

* Contact
Gungwon Kang (gwkang@kisti.re.kr) or Dale Choi (dalechoi@kisti.re.kr) at KISTI
Tel.: +82-42-869-0723 (Work), 010-4334-2245 (Cell phone)
   
  Program
 
July 27 (Sun)
17:00 - 19:30 Registration at the APCTP Headquarters (It can also be done at any break times on other days.)

July 28 (Mon)

Chair: Dae-Il Choi (KISTI)
9:00 - 9:10 Opening address by Seunghwan Kim (Executive director of APCTP) or by Sang Pyo Kim (Coordinator of APCTP programs)
9:10 - 10:20 Lecture I by G. Gonzalez
10:20 - 10:40 Coffee break
10:40 - 12:00 Lecture I by G. Faye
12:00 - 14:00 Lunch

Chair: Inyong Cho (Sungkyunkwan U)
14:00 - 18:00 Mini-workshop for research presentations by participants 
14:00-14:20  Changheon Oh (Hanyang U): ˇ°Texture evolution using Capet and Cactusˇ±
14:20-14:40 Shan Bai (Academy of Mathematics and Systems Science): ˇ°Does a black hole grow hair?ˇ±
14:40-15:10 Jinho Kim (Seoul National U): ˇ°General relativistic hydrodynamics and code test: TOV starˇ±
15:10-15:20 Coffee break
15:20-16:00 Yong-Yeon Keum (KIAS): ˇ°Neutrino Mass Bounds from Neutrinoless Beta Decays and Cosmological Probesˇ±
16:00-16:30 Dongil Hwang (KAIST): ˇ°The causal structure of dynamical charged black holesˇ±
16:30-17:00 Donghan Yeom (KAIST): ˇ°Dynamical Black Holes and Information Loss Problemˇ±
17:00-17:50 Nils Dorband (Albert Einstein Institute): ˇ°Modeling the Final State from Binary Black Hole Mergersˇ±
18:30 - 20:00 Welcoming dinner
   

July 29 (Tue)
Chair: Sang Pyo Kim (Kunsan National U)
9:00 - 10:20 Lecture I by D. Choi
10:20 - 10:40 Coffee break
10:40 - 12:00 Lecture II by G. Gonzalez
12:00 - 14:00 Lunch
Chair: Jungjai Lee (Daejin U)
14:00 - 15:20 Lecture II by G. Faye
15:20 - 15:40 Coffee break
15:40 - 17:00 Lecture II by D. Choi
17:00 - 18:00 Questions/Answers/Discussions

   
July 30 (Wed)
Chair: Hee-Il Kim (SNU)
9:00 - 10:00 Lecture I by M. Shibata
10:00 - 11:00 Lecture I by E. Gourgoulhon
11:00 - 11:10 Coffee break
11:10 - 12:10 Lecture III by G. Gonzalez
12:10 - 14:00 Lunch

Chair: Yong-Yeon Keum (KIAS)
14:00 - 15:00 Lecture II by M. Shibata
15:00 - 16:00 Lecture II by E. Gourgoulhon
16:00 - 16:10 Coffee break
16:10 - 17:10 Lecture III by M. Shibata
17:10 - 17:20 Photo session
17:20 - 18:00 Questions/Answers/Discussions
18:40 - 21:30 Banquet
   
July 31 (Thu)
Chair: Hyeongchan Kim (Sogang U)
09:40 - 11:00 Lecture I by L. Baiotti
11:00 - 12:00 Lecture III by E. Gourgoulhon
12:00 - 14:00 Lunch
Chair: Shan Bai (AMSS)
14:00 - 15:00 Lecture IV by M. Shibata
15:00 - 15:20 Coffee break
15:20 - 16:50 Lecture IV by E. Gourgoulhon
16:50 - 18:00 Questions/Answers/Discussions
   
Aug 1 (Fri)
Chair: Kentaro Takami (Hiroshima U)
09:00 - 10:20 Lecture II by L. Baiotti
10:20 - 10:40 Coffee break
10:40 - 12:00 Lecture III by G. Faye
12:00 - 13:40 Lunch

Chair: Yuri Kang (Ewha Womans U)
13:40 - 14:30 Norihiro Tanahashi (Kyoto U): ˇ°Toward time-evolution simulation in RS-II braneworld modelˇ±
14:30 - 14:50 Dongho Park (Seoul National U & KISTI): ˇ°Gravitational collapse with spherical symmetryˇ±
14:50 - 15:00 Coffee break
15:00 - 16:00 Lecture III by L. Baiotti
16:00 - 17:00 Lecture IV by G. Faye
17:00 - 17:10 Closing remarks by Prof. Sang Pyo Kim
   
   
  Lecture Note
 

D. Choi: Down
G. Gonzalez: Down
E. Gourgoulhon: Down
M. Shibata: Down
L. Baiotti: Down
Workshop: Down

   
  Lecture plans and reading lists
 
L. Baiotti (Tokyo U.):
In my lectures I plan to introduce High-Resolution Shock-Capturing (HRSC) schemes for the numerical solution of the hydrodynamics equations. After revising the definition of fluid and shock, I will introduce finite-volume methods, giving some mathematical background. I will then treat the problem of discretisation, the Riemann problem and some methods to solve them, starting from the idea of Godunov. I will then enter in some details on the various steps of HRSC schemes, giving also concrete examples. Finally I will present the Whisky code, which implements HRSC methods.
The reference texts are:
[1]. R. J. Leveque, Finite Volume Methods for Hyperbolic Problems, Cambridge University Press
[2]. E. F. Toro, Riemann Solvers and Numerical Methods for Fluid Dynamics, Springer

D. Choi (KISTI):
In the first lecture, my intention is to give a general overview of the binary black hole merger simulations. I will start with motivation, and highlight some recent results. Then, I will turn to a rough overview of the technical aspects of the simulations. I will also try to illustrate basic concepts of numerical analysis using model equation.
In the second lecture, I will focus on an important application of BBH merger simulations: calculation of recoil kicks and its impact on astrophysics community. If time allows, I will touch on non-GW application of BBH simulations.

G. Faye (IAP):
In this series of four lectures, we propose to show how the post-Newtonian perturbative approach allows one to investigate the near and far zone dynamics of isolated systems. We shall first introduce a convenient description for the waveform in terms of two sets of radiative multipole moments. Their calculation will be explained in the context of the Blanchet-Damour post-Minkowkian multipole algorithm: it consists, starting from a linear vacuum solution parameterised by some additional "source" moments, in deriving the non-linear corrections of the gravitational field by solving iteratively the Einstein equations that have been truncated at the appropriate post-Minkowskian order; the explicit expression of the source moments is found by matching the exterior field with the metric computed in the near zone by means of a post-Newtonian iteration. Next, we shall present two alternative approaches to obtain the equations of motions of the isolated system. The first one uses the conservation of the stress energy tensor, whereas the second approach is based on the ADM Hamiltonian scheme. The Hamiltonian formulation has numerous practical applications, including the
effective-one-body resummation of the two point-mass dynamics.

G. Gonzalez (LIGO Scientific Collaboration & LSU):
Lectures on "Detection of Gravitational Waves"
These lectures will give a brief overview of the goals, status, and future prospects of the effort on detection of gravitational waves with ground-based interferometric detectors.
Lecture I : "Astrophysical sources of gravitational waves and expected signals"
Reference: "AN OVERVIEW OF GRAVITATIONAL-WAVE SOURCES", Cutler C., Thorne, K, GR16 Proceedings, Bishop N., Maharaj, S, eds., World Scientific, 2002, Arxiv preprint gr-qc/0204090
Lecture II: "Interferometric gravitational wave detectors: present and future"
Latest progress talks: http://gwdaw12.mit.edu/program.html
Lecture III: "Results from current LSC searches for gravitational waves"
References: www.ligo.org --> Observational Results

E. Gourgoulhon (LUTH):
LECTURE 1: 3+1 formalism of general relativity
1. 3+1 foliation of spacetime
2. 3+1 decomposition of Einstein equation
3. The Cauchy problem
4. Conformal decomposition
LECTURE 2: The initial data problem for 3+1 numerical relativity (1/2)
1. The initial data problem
2. Conformal transverse-traceless method
3. Conformal thin sandwich method
LECTURE 3: The initial data problem for 3+1 numerical relativity (2/2)
1. Helical symmetry for binary systems
2. Initial data for orbiting binary black holes
3. Initial data for orbiting binary neutron stars and BH/NS systems
LECTURE 4: Trapping horizon approach to black holes
1. Local approaches to black holes
2. Viscous fluid analogy
3. Angular momentum and area evolution laws
4. Applications to numerical relativity
Suggested references:
Lectures 1 to 3 :
[1]. M. Alcubierre : "Introduction to 3+1 Numerical Relativity", Oxford University Press (2008) http://www.oup.com/uk/catalogue/?ci=9780199205677
[2]. R. Bartnik and J. Isenberg : "The Constraint Equations", in "The Einstein Equations and the Large Scale Behavior of Gravitational Fields --- 50 years of the Cauchy Problem in General Relativity", edited by P.T. Chrusciel and H. Friedrich, Birkhauser Verlag, Basel (2004), p.~1.
[3]. T.W. Baumgarte and S.L. Shapiro : "Numerical relativity and compact binaries", Phys. Rep. 376, 41 (2003).
[4]. G.B. Cook : "Initial data for numerical relativity", Living Rev. Relativity 3, 5 (2000) http://www.livingreviews.org/lrr-2000-5
[5]. E. Gourgoulhon: "3+1 Formalism and Bases of Numerical Relativity", Lectures given at the General Relativity Trimester held in the Institute Henri Poincare (Paris, Sept.-Dec. 2006) http://arxiv.org/abs/gr-qc/0703035
[6]. E. Gourgoulhon : "Construction of initial data for 3+1 numerical relativity", Journal of Physics : Conference Series 91, 012001 (2007) http://arxiv.org/abs/0704.0149
[7]. H.P. Pfeiffer : "The initial value problem in numerical relativity", in "Proceedings Miami Waves Conference 2004" http://arxiv.org/abs/gr-qc/0412002
[8]. J.W. York : "Kinematics and dynamics of general relativity", in "Sources of Gravitational Radiation", edited by L.L. Smarr, Cambridge University Press, Cambridge (1979), p.~83.
Lecture 4 :
[9]. A. Ashtekar and B. Krishnan : "Isolated and dynamical horizons and their applications", Living Rev. Relativity 7, 10 (2004) http://www.livingreviews.org/lrr-2004-10
[10]. I. Booth : "Black hole boundaries", Canadian J. Phys. 83, 1073 (2005) http://arxiv.org/abs/gr-qc/0508107
[11]. E. Gourgoulhon and J.L. Jaramillo : "A 3+1 perspective on null hypersurfaces and isolated horizons", Phys. Rep. 423, 159 (2006)
[12]. E. Gourgoulhon and J. L. Jaramillo : "New theoretical approaches to black holes", New Astronomy Reviews 51, 791 (2008) http://arxiv.org/abs/0803.2944
[13]. B. Krishnan : "Fundamental properties and applications of quasi-local black hole horizons", to appear in the Proceedings of the 18th International Conference on General Relativity and Gravitation (Sidney, Australia, 8-13 July 2007) http://arxiv.org/abs/0712.1575

M. Shibata (Tokyo U.):
In the first two lectures, I focus on reviewing the astrophysical sources of gravitational waves. First, I will summarize scenarios for evolution of binary neutron stars and black hole neutron star binary. In particular, details about hydrodynamical properties and elementary processes which could play an important role in the merger phase will be explained. Then, I will review on the current scenario for gravitational collapse of massive stars and subsequent supernova explosion. Elementary processes which play an important role will be explained.
In the third lecture, hydrodynamic equations are summarized. Not only the Euler and continuity equations but also MHD equations and equations to be solved when the microphysical processes are taken into account are briefly reviewed. Numerical method for solving standard hydro equations will be reviewed by Luca Baiotti in the subsequent lectures.
In the fourth lecture, current status for numerical relativity simulations will be reviewed. In particular, I will present numerical results for merger of black hole and neutron star in detail.

   
   General information
2008 Summer School on Computational Methods in Gravitation and Astrophysics will be held at APCTP (Asia Pacific Center for Theoretical Physics), POSTECH, Pohang in Korea during July 28 - August 1, 2008. A number of people in the fields of gravitation and astrophysics have been putting lots of efforts to establish a group of numerical relativity in Korea since 2005. Every year they held a school, and many researchers delivered very useful lectures on numerical relativity and astrophysics. Some of them include M.W. Choptuik, M. Snajdr, W. Ni, D. Choi, E. Schnetter, M. Shibata, C. Ott and H. Shinkai.
This year the school will focus on gravitational wave physics and GR hydrodynamics more in addition to other various topics including binary black hole coalescences. We hold a half-day workshop on the first day of the school where participants present their works. This may help lecturers prepare their lectures more helpfully for participants. Most lectures will be pedagogical subject to being adjusted upon request, but main lecturers will give talks on their most recent work or status summaries of the topics at the end of their lectures. The school program is attached below. The lecture plans and reading lists are appended as well. Lecture notes will be posted on the school homepage later.
 
Accommodation and Meals
Accommodations will be provided for all participants and be reserved by organizers. Room assignments can be found in the attached file. Lunch tickets are provided during the summer school (i.e., Jul 28 ? Aug 1). Enough amount of sandwiches/bread with some beverage will be available from 8:30 in the morning at the venue. There will be a welcoming dinner on July 28. Banquet on July 30 is free for all participants.
 
How to get to APCTP
There is a nice website which is helpful to get to the school venue, APCTP in Pohang. Please, refer to http://apctp.org/index_eng.html ==> ˇ°Local Informationˇ± ==> ˇ°How to get to APCTPˇ±. To get some information for nearby attractions, refer to ˇ°Local Informationˇ± ==> ˇ°Residential Lifeˇ±.
 

  Sponsored by APCTP & KISTI