As Professor of Astrophysics (Chair) at Göteborg University, I am conducting research on a wide range of subjects: black holes, quasars, neutron stars, gamma ray bursts, gravitational radiation, quantum gravity, accretion discs. My research deals with the extreme conditions of curvature, compactness, density, temperature and strength of gravity typical for high energy astronomical objects. These conditions often reflect fundamental laws of Nature and cannot be even approached in laboratories on Earth.
My research is in general relativity and I am interested in questions about spacetime singularities and cosmic censorship. The cosmic censorship conjecture was proposed by Roger Penrose in the sixties and the hypothesis is that spacetime singularities are always hidden within black holes and cannot be seen (i.e. there are no "naked singularities"). In my research I primarily work on global existence for solutions to Einstein's equations and in particular to the Einstein-Vlasov system where the matter is modelled by kinetic theory. A global existence theorem is the first step towards an understanding of cosmic censorship. I am also interested in kinetic equations in general (on a flat background spacetime) such as the Maxwell-Vlasov system, the Vlasov-Poisson system and the relativistic Boltzmann equation.
Institute for Gravitational Physics and Geometry, Pennsylvania State University, University Park, PA 16801, U.S.A. and Kavli Institute of Theoretical Physics, University of California, Santa Barbara, CA 93106-4030, U.S.A. and Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Am Mühlenberg 1, 14476 Golm, Germany and Erwin-Schrödinger-Institut, Boltzmanngasse 9, 1090 Vienna, Austria
My research interest is in relativistic astrophysics and mathematical physics. Currently, I am studying a variety of binary systems as sources for the space-based gravitational wave detector (LISA). In particular, I am looking at globular cluster populations of relativistic binaries, gravitationally lensed quasars, and supermassive black hole systems in the cores of galaxies. I also hope to begin studying isolated neutron stars as possible sources for ground based gravitational wave interferometers such as LIGO or Virgo. I am the chair of the Task Force on Galactic Binary Populations as part of Working Group 1 of the LISA International Science Team.
Physics Department, Oakland University, Rochester, MI 48309, U.S.A. and Physics Division, National Science Foundation, 4201 Wilson Blvd., Arlington, VA 22230 U.S.A.
My research interests include numerical simulations of mathematical cosmologies to study both the nature of generic collapse and the nature of generic expansion. I am especially interested in the use of simulations to test mathematical conjectures and to explore those properties of solutions to Einstein's equations that might be amenable to mathematical analysis.
Research interests are mostly theoretical, on Einstein's general relativity and gravitational theories, including the problem of motion of bodies in general relativity, the implementation of high-order approximation methods in that theory, the problem of the generation of gravitational radiation by astrophysical sources, and the one of the analysis of gravitational waves when they are observed by current experiments. Has more recently been interested in the problem of dark matter in cosmology.
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Potsdam, Germany and Institute for Gravitational Physics and Geometry, The Pennsylvania State University, University Park, PA 16802, U.S.A.
Loop quantum gravity and cosmology, spin foam models, cosmological singularities, early universe phenomenology, symmetry reduced models of (quantum) gravity, black holes; Poisson sigma models and Poisson geometry, and non-commutative geometry from string theory.
At present my interests lie at the interface between string theory and lower-energy physics, with a particular emphasis on how the discovery of D-branes may have observable consequences in experiments and in cosmology. To the extent that there is a theme to my research, it would be the use of effective field theory techniques throughout high-energy physics and other fields.
My research interests include a variety of topics in theoretical physics, especially including cosmology, field theory, and gravitation, or elementary physics more broadly. This is an especially exciting time for this kind of science; a flood of data and suprising observational results are revolutionizing cosmology, new experiments (from accelerators and elsewhere) are invigorating particle physics, and advances in string theory have brought it into closer contact with low-energy physics and gravitation.
Global structure of solutions of Einstein equations, Global Lorentzian geometry, General relativistic constraint equations, Mass in general relativity, Classification of black hole space-times, Nonlinear partial differential equations
Technische Universität Dortmund, Department of Human Sciences and Theology (14), Emil-Figge-Str. 50, 44221 Dortmund, Germany and Interdisciplinary Center for Science and Technology Studies: Normative and Historical Perspectives (IZWT), Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal
My research interest are in numerical realativity and relativistic astrophysics. My research is centered on the simulation of compact binary systems and is currently focused on techniques for constructing astrophysically realistic initial data for binary black hole configurations.
IUCAA, PostBag 4, Ganeshkhind, Pune 411 007, India
Prof. Dhurandhar's reseach is on gravitational wave data analysis and computer modelling of gravitational wave detectors. He has worked on efficient search algorithms for ground-based detectors for inspiraling compact binaries. Recently, he used commutative algebraic methods for canceling laser frequency noise in LISA. Prof Dhurandhar has collaborations with major detector groups world-wide and has been a member of the LIGO Science Collaboration since 2000.
His work has focused on both binary neutron stars as well as black hole-neutron star binaries, evolved in post-Newtonian, conformally flat, and fully general relativistic gravitational formalisms. Most recently, he was part of a team responsible for fully general relativistic calculations of merging BH-NS binaries, studies of magnetohydrodynamic flows in the presence of puncture BHs, and the construction of highly accurate BH-NS initial data for use in dynamical simulations.
I have a broad interest in computational astrophysics, particularly numerical simulations of novel hydrodynamic, magnetohydrodynamic (MHD), and radiation MHD effects in astrophysics. Currently, my primary interest is in developing and utilizing codes to study black hole accretion and the feedback of black holes on their environments through jets. This research may be applicable to quasars, active galactic nuclei (AGN), X-ray binaries, core-collapse supernovas, and gamma-ray bursts (GRBs), all of which contain jet-like features and are likely powered by accreting black holes.
Relativistic theories of gravitation, in particular scalar-tensor theories and, recently, a Finsler generalization of flat space-time; relativistic thermodynamics; exact solutions of Einstein's equations and their symmetries; cosmology (but no speculations on early universe!); history of special and general relativity and its creator Einstein; science research.
Simulations of core collapse and binary neutron star mergers; Formulations of the Einstein equations, boundary conditions, and gauge choices for numerical relativity; Effects of rotation and magnetic fields in gravitational collapse
Gravitational Wave Detection on ground (GEO 600 and Advanced LIGO) and in space (LISA); ultra stable lasers, ultra sensitive mechanical systems, and investigation of materials of ultra-low mechanical loss.
Gravitation and Cosmology, Quantum Field Theory in Curved Spacetime, Quantum Processes in the Early Universe, Nonequilibrium Statistical Field Theory, Foundational Issues of Quantum Mechanics, Theoretical Aspects of Quantum and Atom Optics
Anisotropy of the microwave background, cosmology, the Galactic Centre, telescope surface profile measurement, phase reconstruction problems, atmospheric spectral line broadening. Geometric algebras, the application of Clifford Algebras in physics.
My research interests include radio astronomy, compact objects, signal processing and numerical simulations of stellar populations. I am particularly interested in studies of pulsars - rapidly rotating highly magnetized neutron stars.
My research is centered on general relativity – the Einstein equations for gravity. More precisely I am interested in properties and the behavior of light-rays in the presence of gravitational fields and how the gravitational field can be reconstructed from the properties of the the light-rays.
My research interests are subjects from classical general relativity, in particular applications from Lorentzian geometry, e.g. variational problems for geodesics, geometry of wave fronts, and related subjects with relevance to gravitational lensing.
My research so far has been related in various ways to the investigation of the underlying algebraic structures in supergravity and string theory. One point of entry into this topic is the analysis of gravitational theories close to a spacelike singularity (the "BKL-limit"), for which infinite-dimensional Kac-Moody algebras turn out to play an important role. More precisely, for many theories of interest, the dynamics in the vicinity of a spacelike singularity is controlled by hyperbolic Coxeter groups, corresponding to Weyl groups of hyperbolic Kac-Moody algebras. The BKL-limit therefore reveals a "hidden" arithmetic structure in theories coupled to gravity. Recently, I have investigated how this structure is modified when the spatial dimensions are described by compact manifolds of nontrivial topology. From another point of view, it is well known that similar arithmetic structures arise in string/M-theory in the form of discrete U-duality groups. Motivated by this, I am also studying the construction of arithmetic subgroups of Lie groups, and their relation with automorphic forms.
My research activities have recently been divided into two broad streams. The first stream is concerned with the physics of black holes in tidal environments. The second stream is concerned with the gravitational self-force. The context for this work is provided by the ongoing effort to measure gravitational waves using earth-based detectors (now operational) and space-based detectors (in development).
My research focuses on the physics of neutron stars and black holes, the properties of magnetohydrodynamic turbulence in accretion flows, the testing of the theory of general relativity in the strong-field regime, and the physics responsible for the accelerating universe. I routinely solve problems that involve hydrodynamics and photon transport in extreme physical conditions, using both analytical and numerical tools.
My research is aimed at developing precision optics formed from novel materials, employing techniques such as surface characterisation, polishing and chemical etching, in addition to thermal treatment, with the goal of developing instrumentation for future gravitational wave observatories.
Gravitational Wave Detection on ground (GEO 600 and Advanced LIGO); ultra sensitive mechanical systems, and investigation of materials of ultra-low mechanical loss, lasers for Gravitational Wave Detectors.
My research interests at different times have focussed on cosmology, large-scale structure, classical field theory and symmetry breaking. For the past decade I have done most of my research on sources of gravitational waves and their detection. My research group is engaged in the analysis of data from the British-German GEO 600 and American LIGO interferometric gravitational wave detectors, mainly concerned with the searches for coalescences of compact objects (i.e. neutron stars and black holes), transients from supernovae and stochastic background.
My research has always focused on the applications of Einstein's theory of general relativity in astrophysics. I began by studying the stability and pulsation of rotating stars, mainly in order to understand neutron stars, which can spin many hundreds of times per second. Pulsating stars emit gravitational radiation, so I got interested in the problem of gravitational wave emission, especially by stars in binary systems, which are studied by post-Newtonian methods. This led to an interest in using numerical relativity to simulate the orbiting and merging of black holes in binary systems. The development of sensitive gravitational wave detectors led me to study gravitational wave data analysis in depth. This has occupied the majority of my research time in the past two decades.
His research interests lie in the understanding of the structure of space and time, using the study of black holes and cosmological singularities in the framework of string theory, and the possible observational signatures that this theory may have in experiments.
Laboratoire de Mathématiques et Physique Théorique, Université François-Rabelais Tours Fédération Denis Poisson - CNRS, Parc de Grandmont, 37200 Tours, France
General relativity, theoretical high-energy physics as applied to black holes and cosmology. In recent years my work has focused on the development of the conformal field theory description of black hole phenomena, the study of information loss in black holes, the exploration of observable implications of extra dimensions, and the formulation of the holographic description in curved and flat space-times.
My work involves the observation of radio pulsars and their companions, with a general theme of studying binary pulsar evolution, and with sidelines in such areas as pulsar instrumentation and polarimetry, and some higher-frequency observations.
Development of techniques in advanced interferometry for application to the detection of gravitational radiation from astrophysical sources. In particular I have been involved in the design, testing and optimisation of signal recycling systems for laser interferometers.
Theoretical cosmology. Specific examples include theory of structure formation in the universe, modeling galaxy clusters on the basis of multi-band observations, gravitational lens astronomy, cosmological hydrodynamic simulations, galaxy evolution model using the Monte-Carlo method, nonlinear gravitational many-body problems, general relativistic effects at high redshift universes, origin of biasing of astronomical objects relative to dark matter distribution, and search for extrasolar planets.
Center for Scientific Computation and Mathematical Modeling, Department of Physics, Joint Space Sciences Institute. Maryland Center for Fundamental Physics, University of Maryland, College Park, MD 20742, USA
Sources of gravitational waves: black holes, neutron stars; High order and spectral methods in complex geometries; High performance computing
In particular I am interested in research areas related to cosmology and gravitation such as: Inflationary Universe, Particle creations in early universe, String Cosmology, Cosmological density perturbations, Cosmic microwave background and large scale structure, Dark energy, Loop quantum gravity, Modified gravity, Black holes, and Neutrino Physics
Science motivation, mission design, and data analysis of high precision gravitational experiments in space
Relativistic cosmology and alternative theories of gravity; theory of gravity-wave astronomy, including wave generation, propagation and detection
Theory of and modeling for high precision astronomical reference frames; lunar and interplanetary laser ranging; pulsar timing experiments;
Optimization and control algorithms for long-baseline optical interferometry; analytical and numerical techniques for the white-light fringe parameter estimation
Institut d’Astrophysique de Paris, UMR-7095 du CNRS, Université Pierre et Marie Curie, 98 bis bd Arago, 75014 Paris (France) and Department of Mathematics and Applied Mathematics, Cape Town University, Rondebosch 7701 (South Africa) and National Institute for Theoretical Physics (NITheP), Stellenbosch 7600 (South Africa)
Soliton solutions of Einstein's equations; Quantum effects in the early universe: cosmic strings and inflation; Quantum field theory in curved spacetime; Semiclassical and stochastic gravity; Quantum to classical transitions and open quantum systems; Vaccum decay in field theory
I am currently engaged in several major research projects. The technical thrust of these projects can be summarized as 'field theory under unusual conditions', and the potential applications run all the way from basic quantum physics to cosmology and quantum gravity.
My research mainly has focused upon the theory of quantum phenomena in strong gravitational fields, particularly quantum effects involving black holes and black hole thermodynamics. My interests also span attempts to formulate a quantum theory of gravitation (where no background classical metrical or causal structure of spacetime is present), mathematical investigations of classical general relativity, and applications of general relativity to cosmology and astrophysics (such as gravitational lensing phenomena and gravitational radiation reaction effects).
His research interests are theoretical, encompassing the observational and astrophysical implications of Einstein's general theory of relativity, including gravitational radiation, black holes, cosmology, the physics of curved spacetime, and the theoretical interpretation of experimental tests of general relativity.
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, 14476 Potsdam-Golm, Germany and Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, U.S.A.