Eigth Italian-Korean Meeting

18 August 2003 - 23 August 2003,
Rome - Pescara, Italy


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This seminar is organized to accelerate information interchange between Korean and Italian astrophysicists on new and hot topics on the subject. Especially for this year we want to exchange recent developments on modern astrophysics. Furthermore, this seminar will improve the cultural understanding between two countries. Especially this seminar will remarkably improve the understanding the origin of gamma ray bursts(GRB) and the X-ray astronomy with hot discussions between active young scientists of both countries. Furthermore, the exchange of new ideas about numerical methods for astrophysics will be basis for realistic large scale simulations.

 

Supporting Institutes

  • International Center for Relativistic Astrophysics (ICRA)
  • Consiglio Nazionale delle Ricerche (CNR)
  • Korea Science and Engineering Foundation (KOSEF

Monday, 18 August 2003, Sala Convegni

Morning Session, Chair Person : She Sheng Xue

9:00 - 9:40        Opening Address (Prof. Remo Ruffini, ICRA and

                        Prof. Hyun Kyu Lee, Hanyang University)

9:40 - 10:20      Opening Address (Prof. Remo Ruffini, ICRA and

                        Prof. Hyun Kyu Lee, Hanyang University)

10:20 - 10:40    Coffee Break

10:40 - 11:20    Prof. Hyung Won Lee (Inje University, ICRA)

                        Schwarzschild solution with numerical relativity

11:20 - 12:00    - (Istituto Nazionale Ottica Applicata Firenze)

                        "Strong" chaos, nonequilibrium entropy & microcanonical thermodynamics of Self Gravitating Systems

12:00 - 15:00    Lunch

 

Afternoon Session, Chair Person : Jongmann Yang (Ewha University)

15:00 - 15:40    Dr. Hee-Il Kim (Sejong University)

                        Extreme scattering events

15:40 - 16:20    Dr. Gianluca Cruciani (ICRA)

                        Fermi-Ibanez metric and timelike geodesics

16:20 - 16:40    Coffee Break

16:40 - 17:20    Dr. Donato Bini (CNR)

                        Gravitoelectromagnetism: applications to the Taub-NUT spacetime

17:20 - 18:00    Dr. Andrea Geralico (ICRA)

                        Electrostatics on a Reissner-Nordstrom black hole background I

Tuesday, 19 August 2003, Sala Convegni

Morning Session, Chair Person : Sung-Won Kim (Ewha University)

9:00 - 9:40        Prof. Jongmann Yang (Ewha Womans University)

                        High Energy Experiment with AMS and CREAM I

9:40 - 10:20      Dr. She Sheng Xue (ICRA)

                        Theory of Dyaodosphere

10:20 - 10:40    Coffee Break

10:40 - 11:20    Dr. Andrea Geralico (ICRA)

                        Electrostatics on a Reissner-Nordstrom black hole background II

11:20 - 12:00    Dr. Andrea Geralico (ICRA)

                        Electrostatics on a Reissner-Nordstrom black hole background III

12:00 - 15:00    Lunch

 

Afternoon Session, Free Time

Wednesday, 20 August 2003, Sala Convegni

 

Morning Session, Chair Person : Donato Bini (CNR)

9:00 - 9:40        Dr. Carlo Bianco (ICRA)

                        The GRB 991216 in the EMBH model

9:40 - 10:20      Dr. Cristian Cherubini (ICRA)

                        Perturbations of Kerr-Taub-Nut spacetime

10:20 - 10:40    Coffee Break

10:40 - 11:20    Dr. Doo Jong Song (Korea Astronomy Observatory)

                        Distortion of Thermal Sunyaev-Zeldovich Spectrum due to temperature structures of cluster of galaxies

11:20 - 12:00    Dr. Simone Mercuri (ICRA)

                        Revised quantum geometrodynamics via frame fixing

12:00 - 15:00    Lunch

 

Afternoon Session, Chair Person : Doo Jong Song (KAO)

15:00 - 15:40    Prof. Sangpyo Kim (Kunsan University)

                        Dynamical Theory of Nonequilibrium Phase Transitions and Topological Defect Formation in the Early Universe

15:40 - 16:20    Dr. Costantino Sigismondi (ICRA)

                        Astrometry and Relativity

16:20 - 16:40    Coffee Break

16:40 - 17:20    Prof. Vladmir Belinski (ICRA)

                        Boundary conditions in the Unruh problem

17:20 - 18:00   

                       

Thursday, 21 August 2003, Sala Convegni

Morning Session, Chair Person : Prof. Hyung Won Lee (ICRA)

9:00 - 9:40        Prof. Pascal Chardonnet (University of Savoie)

                        Ultra High Energy Cosmic Rays : a new frontier

9:40 - 10:20      Dr. Luca Vitagliano (ICRA)

                        On the General Relativistic Dynamical Formation of the Dyadosphere

10:20 - 10:40    Coffee Break

10:40 - 11:20    Dr. Massimiliano Lattanzi (ICRA)

                        Effect of neutrino asymmetry on the cosmic microwave background anisotropy spectrum

11:20 - 12:00    Prof. Jongmann Yang (Ewha Womans University)

                        High Energy Experiment with AMS at Ewha and Kyung Pook in Korea

12:00 - 12:30    Simple Lunch

 

Afternoon Visit to Museo del'Aquila

 

14:00 -             Departure to Museo del'Aquila

23:00 -             Arrival in Pescara

Friday, 22 August 2003, Sala Convegni

Morning Session, Chair Person : Prof. Soon-Tae Hong (Ewha University)

9:00 - 9:40        Prof. Sangpyo Kim (Kunsan University)

                        Remarks on Schwinger Pair Production by EMBH

9:40 - 10:20      Prof. Sungwon Kim (Ewha Womans University)

                        Gravitational waves from exotic source

10:20 - 11:00    Group Photo and Coffee Break

11:00 - 12:00    Press Conference

                       

12:00 - 15:00    Lunch

 

Afternoon Session, Chair Person : Prof. Sang Pyo Kim (Kunsan University)

15:00 - 15:40    Dr. Fabrizio Clarelli (ICRA)

                        Stability region of Neutron Stars and Mass-Radius relation

15:40 - 16:20    Dr. Giovanni Imponente (ICRA)

                        Generic deSitter Solution with scalar field

16:20 - 16:40    Coffee Break

16:40 - 17:20    Prof. Soon-Tae Hong (Ewha Womans University)

                        Warped products and the black holes

17:20 - 18:00    Prof. Hyun Kyu Lee (Hanyang University)

                        Possible gravitational radiation at the center of GRB

Saturday, 23 August 2003, Sala Convegni

 

Morning Session, Chair Person : Prof. Hyung Won Lee (ICRA)

8:30 -               Departure for Rome

Surname Name Affiliation Title of talk Abstract
Belinski  Volodia ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza" Boundary conditions in the Unruh problem  
Bianco Carlo ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza" The GRB 991216 in the EMBH model  
Bini Donato ICRA and Istituto per le Applicazioni del Calcolo "M. Picone", CNR Gravitoelectromagnetism: applications to the Taub-NUT spacetime The role of the gravitomagnetic monopole moment of the Taub-NUT solution is studied for spinning test particle moving along circular orbits. Comparison with the Schwarzschild case is also considered.
Chardonnet Pascal ICRA and University of Savoie Ultra High Energy Cosmic Rays : a new frontier?  
Cherubini Cristian Universita di Salerno, Italy and ICG, University of Portsmouth, UK Perturbations and gravitomagnetism in the Kerr-Taub-NUT spacetime The master equation describing massless fields of different spin in the Kerr-Taub-NUT spacetime representing a source with a mass plus gravitomagnetic monopole and dipole moments is studied. This equation can be separated into its radial and angular parts. The behaviour of the radial functions at infinity and near the horizon is studied in order to examine the influence of the NUT parameter on the phenomenon of superradiance. Moreover it is discussed the coupling between the spin of the perturbing field and the gravitomagnetic monopole moment.
- - Istituto Nazionale Ottica Applicata, Firenze "Strong" chaos, nonequilibrium entropy & microcanonical thermodynamics of Self Gravitating Systems  
Clarelli Fabrizio ICRA and Dip. Metodi e Modelli Matematici, Universita di Roma "La Sapienza" Stability region of Neutron Stars and Mass-Radius relation We present detailed analysis of the mass radius relations in the neutron stars which outline some interesting features about the morphology of such astrophysical object. In particular we numerically integrate the Tolman Oppenheimer Volkoff equations in correspondence to different choices for the core equation of state and using the standard Harrison Wheeler scheme for modelling the external envelope; in this procedure the central density of the star is to be regarded as a free parameter of the theory. The results of our integration show a crucial morphology in the {\em mass-central density diagram} which consists of the appearence of an existence domain; this achievement allows to characterize the astrophysical nature of an observed stellar object simply by its mass, i.e. when its values lies outside such domain we can exclude that the object under study is a neutron star. Furthermore we candidate (in alternative to the {\em strange star proposal}) neutron stars cores as the astrophysical objects responsible for the mass radius profiles observed by Beppo Sax.
Cruciani Gianluca ICRA and Universita di Perugia Geodesics of the Ferrari-Ibanez metric: a computer algebra approach It is shown how to build a simple computer algebra procedure to draw the geodesic paths of a particle moving in a single gravitational plane wave spacetime, with various initial velocities, and subsequently penetrating a GW collision zone. The software used is Mathematica 4.
Geralico Andrea ICRA and Dip. Di Fisica, Universita di Lecce Electrostatics on a Reissner-Nordstrom black hole background The interaction of a Reissner-Nordstr\"om black hole and a charged test particle is studied together with the lines of force of their electric fields. The electric properties of the black hole horizon are discussed in detail and used to explain the expulsion of the lines of force from the outer horizon as the hole becomes extreme. The particle backreaction is also considered studying the effect of general static perturbations of the hole following the approach of Zerilli.
Guida Roberto ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza"    
Imponente Giampaolo ICRA and Universita di Napoli Generic deSitter Solution with scalar field  
Lattanzi Massimiliano ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza" Effect of neutrino asymmetry on the cosmic microwave background anisotropy spectrum  
Mercuri Simone ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza" Revised quantum geometrodynamics via frame fixing  
Ruffini Remo ICRA and Dip. Di Fisica, Universita di Roma "La Sapienza" Theory of Dyadosphere  
Sigismondi Costantino ICRA and Istituto Armellini, Universita di Roma "La Sapienza" Astrometry and Relativity Since James Bradley's discovery of light aberration (1727) to Gravity Probe-B experiment (launch November 2003) there has been a strict interplay between observational astrometry and measurements of relativistic effects. An overview on light aberration, Mercury's perihelion precession with solar disk ellipticity debate, lunar geodetic precession, Lense-Thirring and Pugh-Schiff precessions in Gravity Probe-B experiment are presented, in order to understand the final choice of the reference star for Gravity Probe-B satellite.
Vitagliano Luca ICRA and Universita di Roma "La Sapienza" On the General Relativistic Dynamical Formation of the Dyadosphere  
Xue She Seng ICRA Theory of Dyadosphere  
Surname Name Affiliation Title of talk Abstract
Hong Soon-Tae Ewha Womans University Warped products and the Reissner-Nordstrom-AdS black hole We studied a multiply warped product manifold associated with the Reissner-Nordstrom-AdS metric to investigate the physical properties inside black hole event horizons. Our results include various limiting geometries of the RN, Schwarzschild--AdS and Schwarzschild space-times, through the successive truncation procedure of parameters in the original curved space.
Kim Sung-Won Ewha Womans University Gravitational perturbation and quasi-normal mode for wormhole Recently the detections of the gravitational waves become one of the important issues. There are some candidates for the gravitational wave sources. As the unknown source that could not be identified by typical interpretations, we propose the waves from the perturbation of the exotic source which consists of exotic matter that violates the known energy conditions. From the results, the wave forms that characterize the sources and radiated energy from the source are found.
Kim Sang Pyo Kunsan National University Dynamical Theory of Nonequilibrium Phase Transitions and Topological Defect Formation in the Early Universe We review the current issues of nonequilibrium phase transitions, in particular, in the early Universe. Phse transitions cannot maintain thermal equilibrium and become nonequilibrium when the thermal relaxation time scale is bigger than the dynamical time scale. Such nonequilibrium phase transitions would have happened in certain evolution stages of the early Universe because the rapid expansion quenched matter fields. We discuss the physical implications of nonequilibrium phase transitions in the early Universe. In particular, it is shown that higher order quantum corrections decrease the density of topological defects.
Kim Hee-Il ARCSEC, Sejong University Extreme scattering events It is generally believed that extreme scattering events are attributed to the refraction of quasar lights by a AU-sized lens with free electrons but the nature of the lens is still a mystery. We investigate the extreme scattering events with various lens profiles and discuss possible relations with dark matter.
Lee Hyun Kyu Hanyang University Gravitational wave from a black hole - torus system at the center of GRB We consider the possible  gravitational wave radiation from a center of GRB,  which consists of a  rotating black hole and a torus.  We propose  gravitational waves  generated by  the precession of the torus.  Using the typical values of black hole mass, mass and radius of torus, one can expect gravitational wave production with frequencies roughly in the range of $10^2 $ up to $10^3$ Hz.   In the small wobble angle approximation, the amplitude is found to be not smaller than the  recent estimation for a precessing neutron star. The effect of the back reaction of gravitational radiation as well as the magnetic alignment process  is also  discussed.
Lee Hyung Won Inje University Schwarzschild solution with numerical relativity We studied the gauge conditions for initial value problems for numerical general relativity.
Song Doo Jong Korea Astronomy Observatory Distortion of Thermal Sunyaev-Zeldovich Spectrum due to temperature structures of cluster of galaxies X-ray observations of some clusters of galaxies offer evidence that temperature maps have shown significance spatial temperature structures. We study the Boltzmann transport equation to calculate how the presence of intracluster medium temperature structures distort the thermal Sunyaev-Zeldovich spectrum.
Yang Jongmann Ewha Womans University High Energy Experiments with AMS and CREAM Status of the AMS experiment which is the first high energy experiment on International Space Station and aims to find the signatures of the dark matter as a form of SUSY particle such as photino will be discussed. Also, CREAM experiment which is the most recent ultra high energy cosmic ray experiments on ULDB in 2005 will be discussed. For the CREAM experiment we will describe the current status of the Si sensor charge dector which has been developed, manufactured, and tested in our laboratory.