2015 International School on Numerical Relativity and Gravitational Waves
July 26 (Sun), 2015 ~ July 31 (Fri), 2015 at KISTI & KAIST, Daejeon in Korea
■ Program

     

    The circular and program in a pdf file:  2015NRGWSchool_Circular_Program.pdf 

     

     

    Time

    Jul 26

    (Sun)

    Jul 27

    (Mon)

    Jul 28

    (Tue)

    Jul 29

    (Wed)

    Jul 30

    (Thu)

    Jul 31

    (Fri)

    9:00

     

    Opening addr.

    Nielsen III

    9:10-10:00

    OConnor II

    9:10-10:00

    Arun II

    9:10-10:00

    Gold II

    9:10-10:00

    Nielsen I 9:10-10:00

     

    10:00

     

    Coffee break

    Coffee break

    Coffee break

    Coffee break

    Coffee break

    Hilditch I

    10:20-11:10

    Cannon I

    10:20-11:10

    OConnor III 10:20-11:10

    Arun III

    10:20-11:10

    Etienne II

    10:20-11:10

    11:00

     

    McIver I

    11:10-12:00

    McIver III

    11:10-12:00

    Arun I

    11:10-12:00

    Cannon III

    11:10-12:00

    Zhang I

    11:10-12:00

    12:00

     

    Lunch

    (MOU signup)

    Lunch

    (Photo session

    12:00-12:05)

    Lunch

    Lunch

    Lunch

    13:00

    14:00

    Pre-School:

    Kang I

    14:00-15:20

     

    Coffee break

     

    Kang II

    15:40-17:00

    Nielsen II

    14:00-14:50

    Sekiguchi I

    14:00-14:50

    Sekiguchi II

    14:00-14:50

    Hilditch II

    14:00-14:50

    Zhang II

    14:00-14:50

    Coffee break

    Coffee break

    Coffee break

    Coffee break

    Coffee break

    15:00

    McIver II

    15:20-16:10

    OConnor I

    15:20-16:10

    Cannon II

    15:20-16:10

    Gold I

    15:20-16:10

    Gold III

    15:20-16:10

    16:00

    Cella I

    16:10-17:00

    Cella II

    16:10-17:00

    Free Time

    (Supercom. Tour, Informal Talks, etc.)

    16:10-18:00

    Etienne I

    16:10-17:00

    Etienne III

    16:10-17:00

    17:00

     

     

     

     

    Closing rem.

     

    18:00

     

    Welcoming dinner

    18:30-20:30

     

    Banquet

    18:30-20:30

     

     

     

     

    * Welcoming dinner: Leekewon   Leekewon.pdf

    * Banquet: Ishidol (Phone: 042-825-8285)   Ishidol.pdf

     

    Lecturers and Topics

     

       · K. G. Arun (Chennai Mathematical Institute): Post-Newtonian modeling of gravitational waveforms from compact 

                              binaries 

      · Giancarlo Cella (INFN, University of Pisa): Newtonian noises in low frequencies and their mitigation

    · Zach Etienne (West Virginia University): General relativistic magneto-hydrodynamics

    · Roman Gold (University of Maryland): Eccentric binary black hole or neutron star simulations

    · Kipp Cannon (Canadian Institute for Theoretical Astrophysics): CBC search overview and low-latency pipeline, MBTA

    · David Hilditch (University of Jena): Formalisms of numerical relativity

    · Gungwon Kang (KISTI & KAIST): Brief summaries on general relativity

    · Jessica McIver (University of Massachusetts Amherst): Detector characterization

    · Alex Nielsen (Albert Einstein Institute Hannover): Gravitational wave data analysis for CBC with spins

    · Evan O’Connor (NCSU): Nuclear astrophysics

    · Yu-ichiro Sekiguchi (Toho University): Recent developments in binary neutron star merger in numerical relativity

    · Hongbao Zhang (Vrije Universiteit Brussel): Numerical holography

     

     

    July 26 (Sun)

    Pre-School Program

     

    14:00-15:20 Gungwon Kang (KISTI & KAIST): Brief summaries on general relativity (I)

    15:20-15:40 Coffee break

    15:40-17:00 Gungwon Kang (KISTI & KAIST): Brief summaries on general relativity (II)

     

     

    Main School Program

    July 27 (Mon)

    Chair: John Oh (NIMS)

    9:00-9:05 Bum-Hoon Lee (APCTP Director, TBC): Welcoming address and introduction to APCTP

    9:05-9:10 Hyung Mok Lee (Seoul National University): Opening address

    9:10-10:00 Alex Nielsen (Albert Einstein Institute Hannover): What are gravitational waves? (I)

    10:00-10:20 Coffee break

    10:20-11:10 David Hilditch (University of Jena): Formalisms of numerical relativity (I)

    11:10-12:00 Jessica McIver (University of Massachusetts Amherst): Detector Characterization (I)

    12:00-14:00 Lunch

    13:30-14:00 MOU signing-up between KGWG (Korea Gravitational Wave Group) and KISTI GSDC (Global Science experimental Data Center herb)

     

    Chair: Hyung Mok Lee (Seoul National University)

    14:00-14:50 Alex Nielsen (Albert Einstein Institute Hannover): What are the sources of gravitational waves? (II)

    14:50-15:20 Coffee break

    15:20-16:10 Jessica McIver (University of Massachusetts Amherst): Detector Characterization (II)

    16:10-17:00 Giancarlo Cella (INFN, University of Pisa): Newtonian Noises in low frequencies and their mitigation (I)

    18:30-20:30 Welcoming dinner

     

    July 28 (Tue)

    Chair: Hee-Il Kim (Seoul National University)

    9:10-10:00 Alex Nielsen (Albert Einstein Institute Hannover): How do we detect gravitational wave signals? (III)

    10:00-10:20 Coffee break

    10:20-11:10 Kipp Cannon (Canadian Institute for Theoretical Astrophysics): CBC Search Overview and Low-latency pipeline, MBTA (I)

    11:10-12:00 Jessica McIver (University of Massachusetts Amherst): Detector Characterization (III)

    12:00-14:00 Lunch

     

    Chair: Hyun Kyu Lee (Hanyang University)

    14:00-14:50 Yu-ichiro Sekiguchi (Toho University): Recent developments in binary neutron star merger in numerical relativity (I)

    14:50-15:20 Coffee break

    15:20-16:10 Evan O’Connor (NCSU): Nuclear astrophysics (I)

    16:10-17:00 Giancarlo Cella (INFN, University of Pisa): Newtonian Noises in low frequencies and their mitigation (II)

     

    July 29 (Wed)

    Chair: Chunglee Kim (Yonsei University)

    9:10-10:00 Evan O’Connor (NCSU): Nuclear astrophysics (II)

    10:00-10:20 Coffee break

    10:20-11:10 Evan O’Connor (NCSU): Nuclear astrophysics (III)

    11:10-12:00 K. G. Arun (Chennai Mathematical Institute): Post-Newtonian modeling of gravitational waveforms from compact binaries (I)

    12:00-14:00 Lunch

     

    Chair: Sanghoon Oh (NIMS)

    14:00-14:50 Yu-ichiro Sekiguchi (Toho University): Recent developments in binary neutron star merger in numerical relativity (II)

    14:50-15:20 Coffee break

    15:20-16:10 Kipp Cannon (Canadian Institute for Theoretical Astrophysics): CBC Search Overview and Low-latency pipeline, MBTA (II)

    16:10-18:00 Free time for anything: KISTI supercomputer tour, Informal talks, Self-organized small group meetings, etc.

    18:30-20:30 Banquet

     

    July 30 (Thur)

    Chair: Hee-Suk Cho (KISTI)

    9:10-10:00 K. G. Arun (Chennai Mathematical Institute): Post-Newtonian modeling of gravitational waveforms from compact binaries (II)

    10:00-10:20 Coffee break

    10:20-11:10 K. G. Arun (Chennai Mathematical Institute): Post-Newtonian modeling of gravitational waveforms from compact binaries (III)

    11:10-12:00 Kipp Cannon (Canadian Institute for Theoretical Astrophysics): CBC Search Overview and Low-latency pipeline, MBTA (III)

    12:00-14:00 Lunch

     

    Chair: Mew-Bing Wan (KASI)

    14:00-14:50 David Hilditch (University of Jena): Formalisms of numerical relativity (II)

    14:50-15:20 Coffee break

    15:20-16:10 Roman Gold (University of Maryland): Eccentric binary black hole or neutron star simulations (I)

    16:10-17:00 Zach Etienne (West Virginia University): General Relativistic Magnetohydrodynamics (GRMHD): Introduction to the equations of GRMHD and their astrophysical importance (I)

     

    July 31 (Fri)

    Chair: Kyung Kiu Kim (GIST)

    9:10-10:00 Roman Gold (University of Maryland): Eccentric binary black hole or neutron star simulations (II)

    10:00-10:20 Coffee break

    10:20-11:10 Zach Etienne (West Virginia University): How the GRMHD equations are solved numerically (II)

    11:10-12:00 Hongbao Zhang (Vrije Universiteit Brussel): Numerical holography (I)

    12:00-14:00 Lunch

     

    Chair: Chang-Hwan Lee (Pusan National University)

    14:00-14:50 Hongbao Zhang (Vrije Universiteit Brussel): Numerical holography (II)

    14:50-15:20 Coffee break

    15:20-16:10 Roman Gold (University of Maryland): Eccentric binary black hole or neutron star simulations (III)

    16:10-17:00 Zach Etienne (West Virginia University): Key Results from large-scale GRMHD simulations (III)

    17:00-17:10 Gungwon Kang (KISTI & KAIST): Closing remarks 

     

     

    Brief descriptions of the lectures and talks

     

    July 26 (Sun)

    Gungwon Kang (KISTI & KAIST):

    Brief summaries on general relativity (I, II)

    Basic concepts of general relativity are briefly summarized. They include simultaneity of events, equivalence principle, spacetime curvature, Einstein equations, black hole geometry, TOV solutions, linearized gravity, gravitational waves, etc.. The aim of these two lectures is to remind or provide students with basic concepts of GR which might be helpful for understanding the rest of lectures at the school.

     

    July 27 (Mon)

    Alex Nielsen (Albert Einstein Institute Hannover):

    Gravitational wave data analysis for CBC with spins (I, II, III)

    Lecture 1: What are gravitational waves?

    Where we learn about what gravitational waves are, how they are produced and the ongoing efforts to detect them. The main topics are the linearized wave equation in gravity, the Einstein quadrupole formula, worldwide detectors and space missions.

    Lecture 2: What are the sources of gravitational waves?

    Where we ask what we might detect with gravitational waves. The focus is on binary systems of black holes and neutron stars and their properties, especially their rotational spin.

    Lecture 3: How do we detect gravitational wave signals?

    Where we learn about the data analysis tools that are used to identify gravitational wave signals? Here the main topics are matched filtering, template banks, detection statistics, false alarm rates and the software pipelines used for the analyses.

     

    David Hilditch (University of Jena):

    “Formalisms of numerical relativity (I, II)”

    Title: Free-evolution formulations of General Relativity

    In my lectures I will discuss the consequence of gauge freedom in building free-evolution formulations of general relativity for  numerics. I will start by describing the 3+1 decomposition and the free-evolution approach. The principle requirement of well-posedness of PDE problems will be stressed, and the consequence of ill-posedness on numerics demonstrated. I will overview the formulations in use in 3d numerical relativity for the computation of gravitational waves. Roughly speaking, these fall into two categories, the generalized harmonic and moving puncture approaches. I will explain the strengths and weaknesses of each. I will end with a collection of open problems and, time permitting, discussion of recent developments in the subject.

     

    Jessica McIver (University of Massachusetts Amherst):

    “Detector Characterization (I, II, III)”

    I - An Introduction to Advanced Interferometers

    The basics of advanced terrestrial gravitational wave interferometer instrumentation. The bulk of this lecture will cover a broad overview of the instrumental subsystems that comprise the Advanced LIGO detectors. We will also briefly discuss the expected interferometer configuration for the first observing run, expected to start in September, and how this configuration will change over time as the instruments are commissioned to design sensitivity. This material will lay the foundation for discussion of past, present, and potential future instrumental noise sources. 

     

    II - Noise transients and their impact on astrophysical GW searches

    In introduction to noise transients, or glitches. This lecture will cover the effect of glitches on past searches for transient gravitational waves from astrophysical sources and motivate the critical need for glitch mitigation. We will also discuss a selection of basic tools and techniques used to characterize glitches and diagnose transient noise sources.

     

    III - Current data quality features in Advanced LIGO

    An overview of recent noise artifacts identified in the Advanced LIGO instruments that may be harmful to the transient astrophysical searches. For each highlighted artifact we will discuss its anticipated or measured effect on the GW searches, the techniques used to identify the noise source, if known, and the current mitigation strategy. 

     

    Giancarlo Cella (INFN, University of Pisa):

    “Newtonian Noises in low frequencies and their mitigation (I, II)”

     

    July 28 (Tue)

    Kipp Cannon (Canadian Institute for Theoretical Astrophysics):

    “CBC Search Overview and Low-latency pipeline, MBTA (I, II, III)”

     

     

    Evan O’Connor (NCSU):

    “Nuclear astrophysics (I, II, III)”

    Nuclear astrophysics is the bridge between nuclear/microscopic scales (nuclei, nucleons, neutrinos) and astrophysical scales (stars, supernovae, and mergers).  Physics arising from phenomena on these scales have a very important role in high energy-density astrophysical environments, especially environments where gravitational wave sources are expected. Whether it be the interaction between nucleons (the strong force) the interaction of nucleons and nuclei with leptons (weak force), or charged particle interactions (electric force), all these need to be modeled in numerical simulations to make quantitative (and in some cases qualitative) predictions of observables and outcomes of high energy astrophysical events like the end stage of massive star evolution, core-collapse supernova, gamma-ray bursts, and compact object mergers. This set of lectures will focus on several important aspects of microphysics for such numerical simulations ranging from the nuclear equation of state to neutrino transport and neutrino interactions and nucleosynthesis.  Building on these lectures, I will end with a summary of the current status of core-collapse supernova and compact object merger simulations, with a particular focus on the nuclear astrophysics influences.

     

    July 29 (Wed)

    K. G. Arun (Chennai Mathematical Institute):

    Post-Newtonian modeling of gravitational waveforms from compact binaries (I, II, III)”

    In this set of lectures I will give an overview of the post-Newtonian (PN) theory with the focus on its applications to the modeling of gravitational waveforms from compact binaries. After a quick recap of the linearized theory and quadrupole formula, I will discuss the derivation of the leading order (Newtonian) phasing formula using energy balance argument in time domain. The derivation of the frequency domain gravitational waveform using stationary phase approximation will be discussed.  I will then discuss the ingredients involved in constructing higher order phasing formula which is crucial for match filtering the GW data from the interferometric detectors.  Various PN approximants in the time and frequency domain will be overviewed. The importance of incorporating the higher modes of gravitational waveform (which includes higher harmonics) will be also discussed. I will end by giving a summary of various physical effects which need to be incorporated in the gravitational waveforms and the state of art of the field.


    1. Basic features of linearized gravity, quadrupole formula
    2. Energy balance equation and derivation of Newtonian phasing formula
    3. Frequency domain gravitational waveforms using Stationary Phase Approximation
    4. Ingredients for the construction of higher order phasing formula.
    5. Survey of various Taylor Approximants in time and frequency domains.
    6. Amplitude corrections and higher harmonics.
    7. Various physical effects in the gravitational waveforms and state of art. 

     

    Yu-ichiro Sekiguchi (Toho University):

    Recent developments in binary neutron star merger in numerical relativity

    Talk I: Technical aspects

    Talk II: Mass ejection in the merger and r-process nucleosynthesis

    The merger of binary neutron stars is quite interesting in terms of various aspects, such as, one of the most promising sources of gravitational waves, a promising candidate for the central engine of short-hard gamma-ray bursts, and a site of heavy element nucleosynthesis. For a quantitative study of these topics, we have to perform merger simulations taking into account both general relativistic gravity and detailed microphysical processes. In this talk, I will first review recent developments in implementing neutrino-radiation hydrodynamics together with the microphysics in numerical relativity. Then, I will introduce and review the latest results about the binary neutron star mergers as the origin of heavy elements.

     

    July 30 (Thur)

    Roman Gold (University of Maryland):

    “Eccentric binary black hole or neutron star simulations (I, II, III)”

    1) Introduction to the 2-body problem in GR
    The lecture will begin by briefly reviewing the 2-body problem in Newtonian gravity. We will move on to General Relativity and appreciate similarities to the Newtonian regime, but also qualitatively new features. A focus on eccentric motion will reveal circularization of the orbit, precession, and zoom-whirl orbits.
    Then I will discuss tidal interactions and their influence on both the binary orbital motion and the structure of the individual stars.


    2) Numerical relativity simulations of eccentric binaries: BHBH and NSNS
    A review of numerical relativity studies on eccentric binaries is given. This will show the rich phenomenology in possible orbital dynamics and final outcomes. In the black hole binary case we will focus on zoom-whirl orbits both at low momentum (elliptical) motion and high momentum (hyperbolic) motion.
    In the neutron star and black-hole neutron star binary case I will review the results obtained so far including tidal excitation of f-modes, tidal disruption and the implications for the remnant system.

    3) Potential Observational signatures
    In the final lecture the focus will be on observational predictions in the form gravitational wave emission and electromagnetic radiation.
    I will review gravitational wave forms highlighting differences between (repeated bursts) eccentric and (chirping) quasi-circular inspiral. An outline of how the waveform and energy radiated depends on the initial configuration of the binary is given. Next, gravitational recoils / kicks including their astrophysical implications are discussed.
    For the cases involving neutron stars I discuss possible implications for gamma ray bursts. In addition the possible consequences of strong tidal deformations for the fate of neutron star crusts are highlighted. I will also review afterglow EM counterparts such as radiation from heavier nuclei that are produced via the r-process from neutron rich ejecta.

     

    Zach Etienne (West Virginia University):

    “General relativistic magneto-hydrodynamics (I, II, III)”

    Lecture 1): "General Relativistic Magnetohydrodynamics (GRMHD): Introduction to the equations of GRMHD and their astrophysical importance."

    Lecture 2): "How the GRMHD equations are solved numerically"

    Lecture 3): "Key Results from large-scale GRMHD simulations"

    The equations of general relativistic magnetohydrodynamics (GRMHD) are believed to be a good description of the driving dynamics behind highly-energetic and luminous phenomena of central importance to astronomy and astrophysics. In a series of three lectures, the GRMHD equations are first introduced with particular focus on their astrophysical significance. The second lecture will review the current state-of-the-art algorithms used to solve these equations in the context of large-scale astrophysical GRMHD simulations, and the final lecture will review some key findings from such simulations.

     

    July 31 (Fri)

    Hongbao Zhang (Vrije Universiteit Brussel):

     “Numerical holography (I, II)”

    After a brief introduction to AdS/CFT for general relativity community, I will present the state of the art numerics used in applied AdS/CFT by some concrete examples, which includes pseudo-spectral method along the spacial direction and Runge-Kutta method in the time direction.