University of Rome "Sapienza"
Department of Physics,
P.le
A. Moro 2, 00185 Rome
ITALY.
People
Valeria
Ferrari
(Full Professor) Homepage
Omar Benhar
(Research Staff)
Leonardo
Gualtieri (Research Associate) Homepage
Stefania
Marassi (Postdoc)
Giovanni
Corvino (Postdoc)
Riccardo Ciolfi (PhD
Student)
Andrea
Maselli (PhD Student)
Vincenzo
Obiso (Undergraduate Student)
According to General Relativity, the emission of gravitational waves is associated to a variety of physical processes that range from astrophysical phenomena - such as the evolution and coalescence of binary systems, gravitational collapse, stellar oscillations and instabilities - to cosmological processes that developed in the very early universe. Signals produced in these processes have different intensities, shapes and characteristic frequencies; some of them are emitted in short bursts, some are continuous, some superimpose to form stochastic backgrounds with spectral properties that depend on the generating phenomenon. The Rome group is concerned primarily with the study of the characteristic features of gravitational signals emitted by astrophysical sources, and of the spectral properties of stochastic backgrounds they generate.
The research interests of the group include:
Stellar Perturbations: generalization of the theory of stellar perturbations of non rotating stars to the case of rotation; study of the spectrum of the quasi-normal modes frequencies; study of the effect of dissipative processes to stellar oscillations; instabilities of stellar oscillations.
Structure and oscillations of strongly magnetized neutron stars: study of neutron stars with large magnetic fields, which can induce deformations (and then GW emission) and affect the stellar oscillations and instabilities
Stochastic background of gravitational waves generated by astrophysical sources: evaluate the spectral properties of the GW background generated by populations of astrophysical sources distributed throughout the Universe
Equation of state of neutron stars: study of the imprint that the internal structure of a star leaves on the pulsation frequencies of the quasi-normal modes and on the gravitational emission
Publications
S. Marassi, R. Schneider, V. Ferrari, Gravitational wave backgrounds and the cosmic transition from Population III to Population II stars Mon. Not. R. Astron. Soc. 398, 293, 2009
E. Berti, V. Cardoso, L. Gualtieri, F. Pretorius, U. Sperhake, Comment on 'Kerr Black Holes as Particle Accelerators to Arbitrarily High Energy' Phys. Rev. Lett. 103, 239001, 2009
V. Cardoso, L. Gualtieri, Perturbations of Schwarzschild black holes in Dynamical Chern-Simons modified gravity Phys. Rev. D80, 064008, 2009
R. Ciolfi, V. Ferrari, L. Gualtieri, J.A. Pons Relativistic models of magnetars: the twisted-torus magnetic field configuration Mon. Not. Roy. Astron. Soc. 397, 913, 2009
V. Ferrari, L. Gualtieri, F. Pannarale A Semi-relativistic Model for Tidal Interactions in BH-NS Coalescing Binaries Class. Quant. Grav. 26, 125004, 2009
V. Ferrari, L. Gualtieri Quasi-normal modes and gravitational wave astronomy Gen. Rev. Grav. 40, 945, 2008
A. Colaiuda, V. Ferrari, L. Gualtieri, J. A. Pons Relativistic models of magnetars: structure and deformations Mon. Not. Roy. Astron. Soc. 385, 2080, 2008
L. Gualtieri, E. Berti, V. Cardoso, U. Sperhake, Transformation of the multipolar components of gravitational radiation under rotations and boosts Phys. Rev. D 78, 044024, 2008
V. Cardoso, L. Gualtieri The Return of the membrane paradigm? Black holes and strings in the water tap Int. J. Mod. Phys. D 17, 505, 2008
V. Ferrari, L. Gualtieri, S. Marassi A new approach to the study of quasi-normal modes of rotating stars Phys. Rev. D 76, 104033, 2007
V. Ferrari, L. Gualtieri, J. A. Pons Unstable g-modes in proto-neutron stars Class. Quant. Grav. 24, 5093, 2007
O. Benhar, M. Valli Shear viscosity of neutron matter from realistic nucleon-nucleon interactions Phys. Rev. Lett. 99, 232501, 2007
O. Benhar, V. Ferrari, L. Gualtieri, S. Marassi Quark matter imprint on Gravitational Waves from oscillating stars Gen. Rel. Grav. 39, 1323, 2007
A. Passamonti, M. Bruni, L. Gualtieri, A. Nagar, C. Sopuerta Coupling of radial and axial non-radial oscillations of compact stars: Gravitational waves from first-order differential rotation Phys. Rev. D 73, 084010, 2006
L. Gualtieri, J.A. Pons, J. A. Miralles, V. Ferrari Relativistic r-modes and shear viscosity AIP Conf. Proc. 861,638, 2006
V. Cardoso, L. Gualtieri Equilibrium configurations of fluids and their stability in higher dimensions Class. Quant. Grav. 23, 7151, 2006
V. Cardoso, M. Cavaglia, L. Gualtieri Hawking emission of gravitons in higher dimensions: Non-rotating black holes JHEP 0602, 021,2006
V. Cardoso, M. Cavaglia, L. Gualtieri Black hole particle emission in higher-dimensional spacetimes Phys. Rev. Lett. 96, 071301, 2006, Erratum ibid. 96, 219902, 2006
V. Ferrari, L. Gualtieri, L. Rezzolla A Hybrid approach to black hole perturbations from extended matter sources Phys. Rev. D 73, 124028, 2006
C. Casalvieri, V. Ferrari, A. Stavridis Gravitational signals due to tidal interactions between white dwarfs and black holes Mon. Not. Roy. Astron. Soc. 365, 929, 2006
O. Benhar Neutron star matter equation of state and gravitational wave emission Mod. Phys. Lett. A 20, 2335, 2005
V. Ferrari Inprint of the equation of state of dense matter on gravitational waves emittted by oscillating neutron stars J.Phys.Conf.Ser. 8, 58, 2005
O. Benhar, V. Ferrari, L. Gualtieri, S. Marassi Perturbative approach to the structure of rapidly rotating neutron stars Phys. Rev. D 72, 044028, 2005
A. Passamonti, M. Bruni, L. Gualtieri, C. Sopuerta Coupling of radial and non-radial oscillations of relativistic stars: gauge-invariant formalism Phys. Rev. D 71, 024022, 2005
J. A. Pons, L. Gualtieri, J. A. Miralles, V. Ferrari Relativistic r-modes and shear viscosity: regularizing the continuous spectrum Mon. Not. Roy. Astron. Soc. 363, 121, 2005
O. Benhar, V. Ferrari, L. Gualtieri Gravitational waves from neutron stars described by modern EOS AIP Conf. Proc. 751, 211, 2005
O. Benhar, R. Rubino Stability of the mixed phase in hybrid stars Astron. & Astrophys. 434, 247, 2005
L. Gualtieri, J.A. Pons, G. Miniutti Non-adiabatic oscillations of compact stars in general relativity Phys. Rev. D 70, 084009, 2004
O. Benhar, V. Ferrari, L. Gualtieri Gravitational wave asteroseismology revisited Phys. Rev. D 70, 124015, 2004
V. Ferrari, L. Gualtieri, J. A. Pons, A. Stavridis Gravitational waves from rotating proto-neutron stars Class. Quant. Grav. 21, 515, 2004
V. Ferrari, L. Gualtieri, J. A. Pons, A. Stavridis Rotational effects on the oscillation frequencies of newly born proto-neutron stars Mon. Not. Roy. Astron. Soc. 350, 763, 2004
C. Sopuerta, M. Bruni, L. Gualtieri Non-linear N-parameter spacetime perturbations: gauge transformations Phys. Rev. D 70, 064002, 2004
E. Berti, M. Cavaglia, L. Gualtieri Gravitational energy loss in high-energy collisions: ultrarelativistic plunge into a multidimensional black hole Phys. Rev. D 69, 124011, 2004
V. Ferrari, G. Miniutti, J. A. Pons Gravitational waves from neutron stars at different evolutionary stages Class. Quant. Grav. 20, 8841, 2003
V. Ferrari, G. Miniutti, J. A. Pons Gravitational waves from newly born, hot neutron stars Mon. Not. Roy. Astron. Soc. 342, 629, 2003
G. Miniutti, J.A. Pons, E. Berti , L.Gualtieri, and V. Ferrari, Non-radial oscillation modes as a probe of density discontinuities in neutron stars, MNRAS 338, 389, 2003
V. Ferrari , What Gravitational waves say about the structure and the evolution of astrophysical sources, Invited Talk, Proceedings of the J. Hopkins Workshop on Current Problems in Particle Theory 25, Firenze 3-5 September 2001. ``2001:A Relativistic Spacetime Odyssey, ed. by I. Ciufolini, D. Dominici, L. Lusanna, World Scientific Pub.,261, 2003
V. Ferrari , Perturbations of black holes, in in Current Trends in Relativistic Astrophysics, Theoretical Numerical, Observational, ed. by L. Fernández-Jambrina, L.M. González-Romero, LNP 617, 50-67 Springer Verlag 2003
V. Ferrari , Stellar Perturbations , in in Current Trends in Relativistic Astrophysics, Theoretical Numerical, Observational, ed. by L. Fernández-Jambrina, L.M. González-Romero, LNP 617, 89-112 Springer Verlag 2003
O. Benhar, A. Fabrocini, S. Fantoni, A. Y. Illarionov and G. I. Lykasov Deuteron distribution in nuclei and the Levinger's factor Phys. Rev. C 67, 014326, 2003
M. Petraki, E. Mavrommatis, O. Benhar, J.W. Clark, A. Fabrocini, S. Fantoni Final state interactions in the response of nucleas matter Phys. Rev. C 67, 014605, 2003
M. Bruni, L. Gualtieri, C. F. Sopuerta Two-parameter nonlinear spacetime perturbations: gauge transformations and gauge invariance Class. Quant. Grav., 20, 535, 2003
E. Berti, J.A. Pons, G.Miniutti , L.Gualtieri, and V. Ferrari, Are Post-Newtonian templates faithful and effectual in detecting gravitational signals from neutron star binaries? , Phys. Rev. D 66, 064013, 2002
J.A. Pons, E. Berti, L.Gualtieri , G.Miniutti, and V. Ferrari, Gravitational signals emitted by a point mass orbiting a neutron star: effects of stellar structure , Phys. Rev. D 65, 104021, 2002
J. Miralles, J. A. Pons, V. Urpin, Hydromagnetic instabilities in proto-neutron stars, Astrophys. J. 574, 356, 2002
O. Benhar, A. Fabrocini, S. Fantoni, A.Yu. Illarionov, G.I. Lykasov, Deuteron distribution in nuclear matter, Submitted for publication in Nucl. Phys. A. 703, 70, 2002
Bini, R.T. Jantzen, G.Miniutti, Electromagnetic-like boost transformations of Weyl and minimal super-energy observers in black hole spacetimes Int. J. Mod. Phys. D 11, 1439, 2002
V. Ferrari, J. C. Miller, L. Rezzolla, Gravitational Waves: a Challenge to Theoretical Astrophysics, Proceedings of the International Conference Gravitational waves: a challenge to theoretical astrophysics, ICTP Lecture Series, Vol. 3, ISBN 92-95003-05-5 2001
L. Gualtieri, E. Berti, J.A. Pons, G.Miniutti,and V. Ferrari, Gravitational signals emitted by a point mass orbiting a neutron star: a perturbative approach , Phys. Rev. D 64, 104007, 2001
E. Berti, V. Ferrari, Excitation of g-modes of solar type stars by an orbiting companion , Phys. Rev. D 63, 064031, 2001
V. Ferrari, M. Pauri, F. Piazza , Quasinormal modes of charged dilatonic black holes , Phys. Rev. D 63, 064009, 2001
R. Schneider, V. Ferrari, S. Matarrese, S.F. Portegies Zwart , Gravitational waves from cosmological compact binaries, Mon. Not. Roy. Astron. Soc. 324, 797, 2001
O. Benhar, A. Fabrocini, S. Fantoni, Ambiguities in the implementation of the impulse approximation, Phys. Rev. Lett. 87, 052501, 2001
J. A. Pons, J. A. Miralles, M. Prakash, J. M. Lattimer, Evolution of proto-neutron stars with kaon condensates, Astrophys. J. 553, 382, 2001
J. A. Pons, W. Steiner, M. Prakash, J. M. Lattimer, Evolution of proto-neutron stars with quarks, Phys. Rev. Lett. 86, 5223, 2001
D. Bini, R. T. Jantzen, G. Miniutti, The Cotton, Simon-Mars and Cotton-York tensors in stationary spacetimes, Class. Quant. Grav. 18 4969, 2001
C. Hanhart, J. A. Pons, D. R. Phillips, S. Reddy, The likelihood of GODs' existence: Improving the SN1987a constraint on the size of large compact dimensions, Phys. Lett. B 509 1, 2001
N. Boulanger, L. Gualtieri, An exotic theory of massless spin--two fields in three dimension, Class. Quant. Grav. 18, 1485, 2001
N. Boulanger, T. Damour, L. Gualtieri, M. Henneaux, Inconsistency of interacting, multi-graviton theories, Nucl. Phys. B 97, 127, 2001
L. Andrianopoli, F. Cordaro, P. Fre', L. Gualtieri, Non-Semisimple Gaugings of D=5 N=8 Supergravity and FDA.s, Class. Quant. Grav. 18, 395, 2001
V. Ferrari, K.D. Kokkotas , Scattering of particles by neutron stars: time-evolution for axial perturbations , Phys. Rev. D 62, 107504, 2000
V. Ferrari , Sources of gravitational waves, Invited Talk, CAPP2000, Conference on Cosmology and Particle Physics, July 17 - 28, 2000, Verbier (Switzerland) R. Durrer et al. ed., The American Institute of Physics, 2000
R. Schneider, V. Ferrari, S. Matarrese, Stochastic background of gravitational waves from compact sources, in Recent Developments in General Relativity, B. Casciaro et al. ed., Springer-Verlag, 469, 2000
V. Ferrari, M. D'Andrea, E. Berti, Gravitational waves emitted by extrasolar planetary systems, Int. J. Mod. Phys. D 9, 495, 2000
P.Astone, V. Ferrari, M. Maggiore, J. D. Romano, Stochastic background of gravitational waves, Int. J. Mod. Phys. D 9, 361, 2000
R. Schneider, A. Ferrara, B. Ciardi, V. Ferrari, S. Matarrese , Gravitational Waves Signals from the Collapse of the First Stars, Mon. Not. Roy. Astron. Soc. 317, 385, 2000
O. Benhar, A. Fabrocini, Two-nucleon spectral function in infinite nuclear matter, Phys. Rev. C 62, 034304, 2000
L. Gualtieri, Harmonic Analysis and Superconformal Gauge Theories in Three Dimensions from the AdS/CFT correspondence, Ph. D. Thesis, hep-th/0002116
D.Fabbri, P.Fre', L. Gualtieri, C.Reina, A.Tomasiello, A.Zaffaroni, A.Zampa, 3D superconformal theories from Sasakian & seven-manifolds: new nontrivial evidences for AdS_4/CFT_3, Nucl. Phys. B 577, 54, 2000
D.Fabbri, P.Fre', L. Gualtieri, P.Termonia, Osp(N|4) supermultiplets as conformal superfields on $\partial AdS_4$ and the generic form of N=2, D=3 gauge, Class. Quantum Grav. 17, 55, 2000
V. Ferrari, Different approaches to the study of the gravitational radiation emitted by Astrophysical Sources, Ann. der Phys., 1, 3, 2000
V. Ferrari, L. Gualtieri, A. Borrelli , Stellar pulsations excited by a scattered mass, Phys. Rev.D 59, 1240, 1999
O. Benhar, E. Berti, V. Ferrari, The imprint of the equation of state on the axial w-modes of oscillating neutron stars, Mon. Not. Roy. Astron. Soc. 310, 797, 1999
V. Ferrari , Gravitational wave backgrounds of astrophysical origin, Invited Talk, 3k Cosmology: EC-TMR Conference, L. Maiani et al. ed., The American Institute of Physics, 315, 1999
V. Ferrari, S. Matarrese, R. Schneider, Stochastic background of gravitational waves generated by a cosmological population of young, rapidly rotating neutron stars, MNRAS 303, 258, 1999
V. Ferrari, S. Matarrese, R. Schneider, Gravitational Wave Background from a Cosmological Population of Core-Collapse Supernovae, Mon. Not. Roy. Astron. Soc. 303, 247, 1999
P. Fre', L. Gualtieri, P. Termonia, The structure of N=3 multiplets in AdS_4 and the complete Osp(3|4) x SU(3) spectrum of M-theory on AdS_4 x N^{010}, Phys. Lett. B 471, 2, 1999
D. Fabbri, P. Fre', L. Gualtieri, P. Termonia, M-theory on AdS_4 x M^{111}: the complete Osp(2|4) x SU(3) x SU(2) spectrum from harmonic analysis, Nucl. Phys. B 560, 61, 1999
G.Arcioni, A.Ceresole, F.Cordaro, R.Dauria, P.Fre', L. Gualtieri, M.Trigiante, N=8 BPS Black Holes with 1/2 or 1/4 Supersymmetry and Solvable Lie Algebra Decomposition, Nucl. Phys. B 542, 273, 1999
V. Ferrari, C. Palomba , Gravitational Signals emitted in core collapses leading to black hole formation, Int. J. Mod. Phys. D 7, 825, 1998
V. Ferrari , Energy-conservation laws for perturbed stars and black holes, in Black Holes, Gravitational Radiation and the Universe, edited by B.R.Iyer and B.Bhawal, Kluwer Academic Publishers, Dordrecht, The Netherlands, 53, 1998
F.Cordaro, P.Fre', L. Gualtieri, P.Termonia, M.Trigiante, N=8 Gauging Revisited: an Exaustive Classification, Nucl. Phys. B 532, 245, 1998
V. Ferrari in collaboration with B. Caron et al. : The Virgo Interferometer, Class. Quantum Grav. 14, 1461, 1997
V. Ferrari , Gravitational Waves, stars and black holes, Invited Talk, in Black holes and Relativistic stars a Symposium volume edited by R. Wald, The University of Chicago Press, 1, 1997
V. Ferrari, L. Gualtieri , On the perturbations of a non-rotating star excited by a massive source. I. The matching conditions at the surface of the star, Int. J. Mod. Phys. D 6, 323, 1997
V. Ferrari, Astrophysical sources of gravitational waves, Invited Talk, Proceedings of The 12th Italian Conference on General Relativity and Gravitational Physics, Edited by M.Bassan, V.Ferrari et.al., World Scientific Publ., 149, 1997
V. Ferrari, The quasi-normal modes of stars and black holes,Invited Talk, Proceedings of The International Conference on Gravitational Waves: Sources and Detectors, Cascina (Pisa), World Scientific Publ. 22, 1996
V. Ferrari, Non radial pulsations of compact objects in General Relativity: an overview, Invited talk to the VII Marcel Grossmann Meeting July 24-30, Stanford, USA, 1994, Proceedings of the 7th Marcel Grossmann Meeting ed. by R. T.Jantzen, R.Ruffini & G.Mac Keiser, World Scientific Publishing Co Pte Ltd, 537, 1996
V. Ferrari, The theory of perturbations of stars, foreword to the Selected Papers of S. Chandrasekhar, vol. 7, 3-8, The University of Chicago Press, 1996
S.Chandrasekhar, V. Ferrari , On the non radial oscillations of stars V. A fully relativistic treatment of a newtonian star, Proc. of the R. Soc. Lond. A 450, 1, 1995
V. Ferrari, Gravitational waves emitted by stars and black holes: frequencies, energies and waveforms, Invited talk, XI Italian Conference on General Relativity and Gravitational Physics Trieste Sept. 1994, Proceedings World Scientific Publ. 3, 46, 1995
Donato Bini, V. Ferrari, Scattering of Dirac particles by gravitational plane waves, Int. J. Mod. Phys. D 4, 291, 1995
V. Ferrari, M. Germano, Scattering of gravitational waves by newtonian stars, Proc. of the R. Soc. Lond. A 444, 389, 1994
V. Ferrari, Review on the book "Colliding Plane Waves in General Relativity", by J.B.Griffiths, Gen. Rel. and Grav. 26, 1993
S.Chandrasekhar, V. Ferrari, On spherical free gravitational waves, Proc. of the R. Soc. Lond. A 443, 445, 1993
V. Ferrari, Non-radial oscillations of stars in general relativity: a scattering problem, issue on classical general relativity, Phil. Trans. R. Soc. Lond. A 340, 423, 1992
V. Ferrari, On the interaction of gravitational plane waves: focusing, singularities, horizons, review article for the special issue Seminario Matematico Universita' di Torino,Singularities in curved spacetime, ed. C. Clarke, G. Ellis, F. Defelice, 93, 1992
S.Chandrasekhar, V. Ferrari, On the non-radial oscillations of a star IV. An application of the theory of Regge poles, Proc. of the R. Soc. Lond. A 437, 133, 1992
V. Ferrari, Identification of black hole, Physics Letters A 171, 271, 1992
V. Ferrari, M. Martellini, Scattering of massless particle spacetime shift, Nuclear Phys. B 385, 604, 1992
S.Chandrasekhar, V. Ferrari, The Einstein pseudo-tensor and the flux integral for perturbed static spacetimes, Proc. of the R. Soc. Lond. A 435, 645, 1991
S.Chandrasekhar, V. Ferrari, On the non-radial oscillations of a star III. A reconsideration of the axial modes, Proc. R. Soc. of Lond. A 434, 449, 1991
S.Chandrasekhar, V. Ferrari, R. Winston, On the non-radial oscillations of a star II: further amplifications, Proc. R. Soc. of Lond. A 434, 635, 1991
S.Chandrasekhar, V. Ferrari, On non-radial oscillations of a slowly rotating star induced by the Lense-Thirring effect, Proc. R. Soc. of Lond. A 433, 423, 1991
S.Chandrasekhar, V. Ferrari, On the non-radial oscillations of a star, Proc. R. Soc. of Lond. A 432, 247, 1991
V. Ferrari, Colliding waves in General Relativity, Invited talk, Conference on General Relativity and Gravitation GR12, Boulder, Colorado, U.S.A. 2-7 July 1989, 3-20 ed. n.Ashby, D.Bartlett, W.Wyss Editors, Cambridge University Press, 1990
S.Chandrasekhar, V. Ferrari, The flux integral for axisymmetric perturbations of static spacetimes, Proc. R. Soc. of Lond. A 428, 325, 1990
V. Ferrari, B. C. Xanthopoulos, Can black holes support a gravitating massive scalar field?, Phys. Rev. D 41, 36521, 1990
V. Ferrari, P. Pendenza, Boosting the Kerr metric, Gen. Rel. and Grav. 10, 1105, 1990
V. Ferrari, P. Pendenza, G. Veneziano, "Beamlike gravitational waves and their geodesics", Gen. Rel. and Grav. 20, 1185, 1988
V. Ferrari, "Focusing process in the collision of gravitational plane waves",, Phys. Rev. D 37, 3061, 1988
V.Ferrari, J.Ibanez, "Type D solutions describing the collision of plane-fronted gravitational waves", , Proc. R. Soc. Lond. A 417, 417, 1988
V.Ferrari, J.Ibanez e M.Bruni, "Colliding plane gravitational waves: a class of non-diagonal soliton solutions",, Phys. Rev. D 36, 1053, 1987
S.Chandrasekhar, V.Ferrari, "On the dispersion of cylindrical impulsive gravitational waves"., Proc. R. Soc. Lond. A 412, 75, 1987
V.Ferrari, J.Ibanez, "On the collision of gravitational plane waves: a class of soliton solutions",, Gen. Rel. and Grav., 19, 405, 1987
V.Ferrari, J.Ibanez, "A new exact solution for colliding gravitational plane waves",, Gen. Rel. and Grav., 19, 383, 1987
C. Coretti, V.Ferrari, "On the radiation emitted by a particle falling into a black hole in the semirelativistic approximation",, Il Nuovo Cimento 93B, 43, 1986
B.Bazanski, V.Ferrari, "Analytic extension of the Schwarzschild-de Sitter metric",, Il Nuovo Cimento 91B 120, 1986
S.Chandrasekhar, V.Ferrari, "On the Nutku-Halil solution for colliding impulsive gravitational waves",, Proc. R. Soc. Lond. A 396, 55, 1984
V.Ferrari, B.Mashhoon, "New approach to the quasi-normal modes of a black hole",, Phys. Rev. D 30, 295, 1984
V.Ferrari, B.Mashhoon, "Oscillations of a black hole", Phys. Rev. Letters, 52, 1361, 1984
V.Bellezza, V.Ferrari, "Coupled electromagnetic and gravitational linearized perturbations of the Kerr-Newman metric"., J. Math. Phys. 25, 1985, 1984
For Questions or Comments contact Valeria Ferrari valeria.ferrari@roma1.infn.it