Publications

2006

• Magnetized Tolman-Bondi Collapse, C. Germani, Christos G. Tsagas, Phys. Rev. D73, 064010 (2006), gr-qc/0511144
  
  
• Coupling of Radial and Axial non-Radial Oscillations of Compact Stars: Gravitational Waves from first-order Differential Rotation, A. Passamonti, M. Bruni, L. Gualtieri, A. Nagar, and C. F. Sopuerta, submitted to Phys. Rev. D, gr-qc/0601001
  
  
• Gravitational signals due to tidal interactions between white dwarfs and black holes, C Casalvieri, V. Ferrari, and A. Stavridis, MNRAS, 365, 929 (2006), astro-ph/058190
  
  

2005

• Non-linear axisymmetric pulsations of rotating relativistic stars in the conformal flatness approximation, H. Dimmelmeier, N. Stergioulas and J.A. Font, e-print, astro-ph/0511394
  
  
• Black hole formation through fragmentation of toroidal polytropes, B.Zink, N. Stergioulas, I. Hawke, C.D. Ott, E. Schnetter, E. Muller, e-print, gr-qc/0501080
  
  
• Resonant amplification of magnetic seed fields by gravitational waves in the early universe, Christos G. Tsagas, Phys. Rev. D72, 123509 (2005), gr-qc/0508556
  
  
• Evolution equations for slowly relativistic stars, A.Stavirids, and K.D. Kokkotas, Int.J.Modern.Physics D14, 543-571 (2005), gr-qc/0411019
  
  
• Three-dimensional relativistic simulations of rotating neutron star collapse to a Kerr black hole, , L. Baiotti, et al., Phys. Rev. D71, 024035 (2005), gr-qc/0403029
  
  
• Quasinormal modes of the Kerr-Newman black hole: Coupling of electromagnetic and gravitational perturbations, E.Berti, and K.D. Kokkotas, Phys. Rev. D 71, 124008 (2005), gr-qc/0502065
  
  
• Stellar Oscillations in Scalar-Tensor Theory of Gravity, H.Sotani, and K.D. Kokkotas, Phys. Rev. D71, 124038 (2005), gr-qc/0506060
  
  
• Gravitational Waves from Compact Sources, K.D. Kokkotas, and N. Stergioulas, Proceedings of 5th International Workshop "New Worlds in Astroparticle Physics", (2005), gr-qc/0506083
  
  
• High Frequency Sources of Gravitational Waves K.D. Kokkotas, Nuclear Physics B (Proc. Suppl.) , 138, 433 (2005).
  
  
• Rotating Relativistic Stars: Two problems K.D. Kokkotas, and M. Vavoulidis In proceeding of NEB-XI, Journal of Physics: Conference Series, 8, 71-80 (2005).
  
  
• Gravitational Wave Asteroseismology in Scalar-Tensor Theory of Gravity, K.D. Kokkotas, and H.Sotani, Proceedings of "Gravity, Astrophysics and Strings" in Black Sea , (2005).
  
  
• Stellar Dynamics in Scalar-Tensor Gravity, K.D. Kokkotas, and H.Sotani, "Recent Advances in Astronomy and Astrophysics", Editor: N. Solomos in the line of the American Institute of Physics (AIP) Conference Series (2005).
  
  
• W-modes in Rotating Stars, N.Stergiouas, K.D. Kokkotas, and I. Hawke, "Recent Advances in Astronomy and Astrophysics", Editor: N. Solomos in the line of the American Institute of Physics (AIP) Conference Series (2005).
  
  

2004

• Gravitational Waves from Rotating Proto-Neutron Stars, V. Ferrari, L. Gualtieri, J.A. Pons, A. Stavridris, Class. Quantum Gravity , 21, S515 (2004), gr-qc/0409578
  
  
• High Frequency Sources of Gravitational Waves, K.D. Kokkotas, Class. Quantum Gravity , 21, S501 (2004), gr-qc/0312039
  
  
• On the w-mode instability of rotating relativistic stars, K.D. Kokkotas, N. Andersson, and J. Ruoff, Phys. Rev. D70, 043003 (2004).
  
• Nonlinear Pulsations in Differentially Rotating Neutron Stars: Mass-Shedding-Induced Damping and Splitting of the Fundamental Mode, N.Stergiouas, T.A. Apostolatos, and J. Font, MNRAS, 352, 1089 (2004), astro-ph/0312648
  
  
• Approximate Matching of Analytic and Numerical Solutions for Rapidly Rotating Neutron Stars, E. Berti, and N. Stergioulas, MNRAS, 350, 1416 (2004), gr-qc/0310061
  
  
• Non-linear resonance in the accretion disk of a millisecond pulsar, W. Kluzniak, M.A. Abramowicz, S. Kato, W.H. Lee, and N.Stergiouas, Astrophys. J., 603, L89-L92 (2004), astro-ph/0308035
  
  
• Probing Strong-Field Scalar-tensor Gravity with Gravitational Wave Asteroseismology, H.Sotani, and K.D. Kokkotas, , Phys. Rev. D , 70:084026 (2004), gr-qc/0409066
  
  
• Gravitational Waves: The high frequency window, N. Andersson, and K.D. Kokkotas, Lect. Notes Phys, 653:255-276 (2004). Springer-Verlag Lectures presented at the 2nd Aegean Summer School on the Early Universe, Syros, Greece, September 2003.
  

2003

• Quasinormal modes of the Reissner-Nordstrom-anti-de-Sitter black holes: scalar, electromagnetic and gravitational perturbation, E.Berti, and K.D. Kokkotas, , Phys. Rev. D67, 064020 (2003), gr-qc/0301052
  
  
• Asymptotic quasinormal modes of Reissner-Nordstrom and Kerr black holes, E.Berti, and K.D. Kokkotas, Phys. Rev. D68, 044027 (2003), hep-th/0303029
  
  
• Stability of five-dimensional rotating black holes on the brane, E.Berti, K.D. Kokkotas, and E. Papantonopoulos, Phys. Rev. D68, 064020 (2003), gr-qc/0306106
  
  
• Highly damped quasinormal modes of Kerr black holes, E.Berti, V. Cardoso, K.D. Kokkotas, and H. Onozawa, Phys. Rev. D668, 124018 (2003), hep-th/0307013
  
  
• Gravitational Wave Astronomy: A New Window to the Universe, K.D. Kokkotas, Special Volume of the Greek Physical Society, (2003), Invited Review (in Greek).
  
  
• Inertial modes of slowly rotating relativistic stars in the Cowling approximation, J. Ruoff, A. Stavridis, and K.D. Kokkotas, MNRAS, 339, 1170-1182 (2003), gr-qc/0203052
  
  
• LMXBs as Sources of Gravitational Waves, K.D. Kokkotas, In proceeding of NEB-X, World Scientific , (2003).
  
  
• Study of the non-radial oscillations of Slowly Rotating Relativistic Stars, A.Stavridis, J.Ruoff, and K.D. Kokkotas, In proceeding of NEB-X, World Scientific , (2003).
  
  
• Approximate Matching of Analytic and Numerical Solutions for Rapidly Rotating Neutron Stars, E. Berti, N. Stergioulas, MNRAS,submitted (2003), gr-qc/0310061
  
  
• Non-linear resonance in the accretion disk of a millisecond pulsar, W. Kluzniak, M. A. Abramowicz, S. Kato, W. H. Lee,  N. Stergioulas, A&A, submitted (2003), astro-ph/0308035
  
  
• Rotating Stars in Relativity,  N. Stergioulas, Living Reviews in Relativity, in press (2002), gr-qc/0302034
  

2002

• An unusually low mass of some "neutron" stars?, D. Gondek-Rosinska, W. Kluzniak, N. Stergioulas, A&A, submitted (2002),  astro-ph/0206470
  
  
• Spin-down of Relativistic Stars with Phase Transitions and PSR J0537-6910, N. Spyrou, N. Stergioulas, A&A, 395, 151 (2002),  astro-ph/0204380
  
  
• Nonlinear r-Modes in Neutron Stars: Instability of an Unstable Mode, P. Gressman, L. M. Lin, W. Suen, N. Stergioulas, J. L. Friedman, Phys. Rev. D, 66, 041303(R) (2002), [pdf]
  
  
• Time evolution of the linear perturbations of a rotating Newtonian polytrope, D. I. Jones, N. Andersson, N. Stergioulas, MNRAS, 334, 933 (2002),  astro-ph/0112495 
  
  
• Three-Dimensional General Relativistic Hydrodynamics II: Long-Term Dynamics of Single Relativistic Stars, J. Font, T. Goodale, S. Iyer, M. Miller, L. Rezzolla, E. Seidel, N. Stergioulas, W. Suen, M. Tobias, Phys. Rev. D, 65, 084024 (2002),  gr-qc/0110047

 
• Gravitational signals emitted by a point mass orbiting a neutron star: effects of stellar structure, J.A. Pons, E. Berti, L. Gualtieri, G. Miniutti, V. Ferrari, gr-qc/0111104, Phys. Rev. D, submitted (2001)


• Strange stars as persistent sources of gravitational waves,  N. Andersson, D.I. Jones & K.D. Kokkotas, MNRAS, submitted,  astro-ph/0111582 (2001)


• Lower Limits on the Maximum Orbital Frequency Around Rotating Strange Stars , D. Gondek-Rosinska, N. Stergioulas, T. Bulik, W. Kluzniak, E. Gourgoulhon, A&A, 380, 190 (2001),  [pdf] [astro-ph]
 
• On the Origin of Compact Radio Sources: The Binary Black Hole Model Applied to the Gamma-Bright Quasar PKS 0420-014, S. Britzen, J. Roland, J. Laskar, K. D. Kokkotas, R. M. Campbell & A. Witzel , A&A,  374, 784 (2001)
 
• Evolution equations for the perturbations of slowly rotating relativistic stars, J. Ruoff, A. Stavridis & K. D. Kokkotas,  MNRAS, in press, gr-qc/ 0109065 (2001)
 
• Oscillation and Instabilities of Relativistic Stars, K. D. Kokkotas & N. Andersson,   invited review for SIGRAV XIV, Genoa 2000, gr-qc/ 0109054 (2001)
 
• On the r-mode spectrum of relativistic stars: Inclusion of the radiation reaction, J. Ruoff & K. D. Kokkotas,  MNRAS, in press,  gr-qc/0106073 (2001)
  
  
• Fast Magnetosonic Waves Driven by Gravitational Waves, D. B. Papadopoulos , N. Stergioulas, L. Vlahos, J. Kuijpers , A&A, 377, 701 (2001), [pdf] [astro-ph]

• Torsional Oscillations of Magnetized Relativistic Stars,  N. Messios, D. B. Papadopoulos & N. Stergioulas, MNRAS, 328, 1161 (2001)
 
• On the r-mode spectrum of relativistic stars in the low frequency approximation, J. Ruoff & K. D. Kokkotas,  MNRAS, 328, 678 (2001)

• Axisymmetric Modes of Rotating Relativistic Stars in the Cowling Approximation, J.A. Font, H. Dimmelmeier, A. Gupta & N. Stergioulas,  MNRAS,  325, 1463 (2001)
 
• Radial oscillations of relativistic stars, K.D. Kokkotas, J. Ruoff, A&A, 366, 565 (2001)
 
• Nonlinear r-Modes in Rapidly Rotating Relativistic Stars, N. Stergioulas & J. A. Font, Phys. Rev. Letters, 86, 1148 (2001)
 
• Evolutionary Self-Energy-Loss Effects in Compact Binary Systems: Importance of Rapid Rotation and of Equation of State, N. K. Spyrou & N. Stergioulas, A&A, 366, 598 (2001)
 
• The r-Mode Instability in Rotating Neutron Stars, N. Andersson & K.D. Kokkotas, Int. J. Mod. Phys. D, 10, 381 (2001)

• Scattering of particles by neutron stars: Time-evolutions for axial perturbations, V. Ferrari & K.D. Kokkotas, Phys. Rev. D., 62, 107504 (2000)


• Towards a Stable Numerical Evolution of Strongly Gravitating Systems in General Relativity: The Conformal Treatments, M. Alcubierre, B. Bruegmann, T. Dramlitsch, J. A. Font, P. Papadopoulos, E. Seidel, N. Stergioulas, R. Takahashi, Phys. Rev. D. 62, 044034 (2000)
 
• R-mode runaway and rapidly rotating neutron stars, N. Andersson, D. I. Jones, K. D. Kokkotas, N. Stergioulas, ApJ Letters, 534, 75 (2000)
 
• Nonlinear hydrodynamical evolution of rotating relativistic stars: Numerical methods and code tests, J.A. Font, N. Stergioulas &K. D. Kokkotas, MNRAS, 313, 678 (2000)
 

1999

•  Quasi-Normal Modes of Stars and Black Holes, K.D. Kokkotas,  and B.G.Schmidt, Living Reviews in Relativity, Vol. 2, No. 1999-2, (1999)


• Gravitational radiation limit on the spin of young neutron stars, N. Andersson, K.D.Kokkotas & B.F.Schutz, ApJ 510, 2 (1999)
 
• Analytic description of the r-mode instability in uniform density stars,   K.D.Kokkotas & N.Stergioulas, A&A 341, 110 (1999)
 
• On the relevance of the r-mode instability for accreting neutron stars and white dwarfs,   N.Andersson, K.D.Kokkotas & N.Stergioulas, ApJ 516, 307-314 (1999)


• Using the gravitational-wave fingerprints of a neutron star to reveal the equation of state,   K. D.Kokkotas, Th.Apostolatos & N.Andersson, MNRAS in press, gr-qc/9901072 (1999)
 
• On the r-mode spectrum of relativistic stars,   H.R.Beyer & K.D.Kokkotas MNRAS 308, 745-750 (1999)
 
• Neutron Star Collisions: The Close Limit,  G.Allen, N.Andersson, K.D.Kokkotas, P.Laguna, J.Pullin & J.Ruoff, Phys. Rev. D.  60, 104021 (1999)
 
• Keplerian frequencies and innermost stable circular orbits of rapidly rotating strange stars,  N. Stergioulas, W. Kluzniak & T. Bulik, A&A (Letter), 352, 116 (1999)
 
• Non-linear evolution of rotating relativistic stars,  N.Stergioulas, J.A.Font & K.D.Kokkotas, proceedings of the 19th Texas Symposium, gr-qc/9904009 (1999)
 
• Construction of Astrophysical Initial Data for Perturbations of Relativistic Stars,   N.Andersson, K.D.Kokkotas, P.Laguna, Ph.Papadopoulos & M.S.Sipior, Phys. Rev. D. 60, 124004 (1999)
 
• Quasi-normal modes of rotating relativistic stars - neutral modes for realistic equations of state,    S. M. Morsink, N.Stergioulas, S. R. Blattnig, ApJ, 510, 854-861 (1999) 

1998

• Pulsation Modes for increasingly relativistic polytropes,   N. Andersson &K.D.Kokkotas, MNRAS 297, 493-496 (1998)


• Gravitational waves from pulsating stars: Evolving the perturbation equations for a relativistic star,   G.Allen, N. Andersson, K.D.Kokkotas & B.F.Schutz, Phys. Rev. D 58, 124012 (1998)
 
• Towards gravitational-wave asteroseismology,   N. Andersson & K.D.Kokkotas, MNRAS 299, 1059-1068 (1998)
 
• Rotating Stars in Relativity,    N. Stergioulas, Living Reviews in Relativity, Vol. 1, No. 1998-8, (1998)
 
• Nonaxisymmetric Neutral Modes in Rotating Relativistic Stars,   N. Stergioulas & J. L. Friedman, ApJ 492, 301 (1998)
 
• Construction of Highly Accurate Models of Rotating Neutron Stars - Comparison of Three Different   Numerical Schemes, T. Nozawa, N. Stergioulas, E. Gourgoulhon & Y. Eriguchi, A&A Suppl. 132, 431   (1998)



1997

• Gravitational waves and pulsating stars: What can we learn from future observations,   K.D. Kokkotas & N. Andersson, invited talk in proceeding of VIRGO conference, Pisa, Italy. Ed. R.   Fidecaro, World Scientific. (1997).


• Pulsating Relativistic Stars,   K.D. Kokkotas, invited review  in Astrophysical Sources of  Gravitational Radiation, 1995, Les   Houches, Eds J.A.Marck and J.P.Lasota, Cambridge University  Press, (1997)
 
• Workshop on Gravitational Waves,   B.R. Iyer and K.D. Kokkotas, invited review of the workshop on Gravitational Waves in the ICGC-95.   December 12 -- 19, 1995, Pune, Eds T. Padmanabhan and S. Dhurandhar, Kluwer, (1997)
 
• Stellar Pulsations and Gravitational Waves,   K.D. Kokkotas, invited review talk in Mathematical Aspects of Theories of Gravitation February    26th - March 30th 1996, Eds A. Krolak and P. Chrusciel Polish Academy of Science (1997)
 
• Gravitational Wave Astronomy: A New Window to the Universe,   K.D. Kokkotas, invited review in the volume in honor of L. Mavridis (1997)
 
• Upper Limit Set by Causality on the Rotation and Mass of Uniformly Rotating Relativistic Stars, S. Koranda, N. Stergioulas & J.L. Friedman, ApJ 488, 799 (1997) 

1996

• Spacetime modes of relativistic stars,   N. Andersson, K.D. Kokkotas & B.F. Schutz, MNRAS 280, 1230 (1996).


• On the oscillations spectra of ultracompact stars: An extensive survey of gravitational-wave modes,   N. Andersson, Y. Kojima & K.D. Kokkotas, ApJ 462, 855 (1996).
  
 
• On the estimation of parameters of the gravitational-wave signal from coalescing binaries by a   network of detectors, P. Jaranowski, K. D. Kokkotas, A. Krolak & G. Tsegas, CQG 13, 1279 (1996)


• Gravitational Waves and Pulsating Stars: What can we learn from future observations?   N. Andersson & K.D. Kokkotas, Phys. Rev. Letters 77 4134 (1996)
  

1995

• Tidal and Tidal-Resonant Effects in Close Binary Systems, K. D. Kokkotas & G. Schaefer, MNRAS 275 301-308 (1995).


• A new numerical approach to the oscillation modes of relativistic stars,   N. Andersson, K.D. Kokkotas & B.F. Schutz, MNRAS 274 1039-1048 (1995).
 
• On the oscillations spectra of ultra compact stars,   Y. Kojima, N. Andersson & K.D. Kokkotas Proc.Roy.Soc.London 471 341--348 (1995).
 
• On estimation of the post-Newtonian parameters in the gravitational-wave emission of a coalescing binary, A. Krolak, K.D. Kokkotas & G. Schaefer, Phys. Rev. D. 52, 2089--2111 (1995).
 
• Comparing models of rapidly rotating relativistic stars constructed by two numerical methods,    N. Stergioulas & J.L. Friedman, ApJ, 444, 306 (1995)
  

1994

• Statistical Analysis of the Estimators of the Parameters of the Gravitational Wave Signal from a Coalescing Binary, K. D. Kokkotas, A. Krolak & G. Tsegas, CQG 11, 1901 (1994).
 
• Axial Modes for Relativistic Stars,   K. D. Kokkotas, MNRAS 268, 1015-1018 (1994).
 
• Gravitational Radiation from Pairs of Realistic, Non-Accreting Compact Stars,    N. K. Spyrou & K. D. Kokkotas, ApJ 431, 254 (1994).


• Deformed Oscillator Algebras for Two-Dimensional Quantum Superintegrable Systems,   D. Bonatsos, C. Daskaloyannis &K. Kokkotas PRA,  50 94, 3700 (1994). 

1993

• Normal Modes of the Kerr-Newman black hole,   K. D. Kokkotas, Il Nuovo Cimento, 108B, 991 (1993).


• Quantum-algebraic Description of Quantum Superintegrable Systems in two dimensions,   D. Bonatsos, C. Daskaloyannis & K.D.Kokkotas, PRA  48, R3407 (1993).
  

1992

• W-modes: A new family of normal modes for pulsating relativistic stars,   K.D. Kokkotas & B.F. Schutz, MNRAS , 225, 119-128 (1992).
 
• WKB equivalent potentials for the SU_q(1,1) and U_q(2) models,   D. Bonatsos, C. Daskaloyannis & K.D. Kokkotas, Chem. Phys. Lett. , 193, 191 (1992).
 
• Classical potential for q-deformed harmonic oscillator,   D.Bonatsos, C.Daskaloyannis & K.D. Kokkotas, Phys. Rev. A , 45, R6153, (1992).
 
• WKB Equivalent Potentials for q-Deformed Harmonic and Anharmonic Oscillators,   D. Bonatsos, C. Daskaloyannis & K.D.Kokkotas, J. Math. Phys. , 9, 2958 (1992). 

1991

• WKB equivalent potentials for the q-deformed harmonic oscillator,   D. Bonatsos, C. Daskaloyannis & K.D. Kokkotas, J. Phys. A 24, L795-L801 (1991).


• Normal Modes of the Kerr black hole,   K.D. Kokkotas, CQG, 8 , 2217-2224, (1991).