Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Pierluigi Fortini"'
We have developed a method to study the effects of a perturbation to the motion of a test point--like object in a Schwarzschild spacetime. Such a method is the extension of the Lagrangian planetary equations of classical celestial mechanics into the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36002b5de25a6e14e6ef54315873b421
http://www.openaccessrepository.it/record/4528
http://www.openaccessrepository.it/record/4528
We present a method to study the time variation of the orbital parameters of a Post-Keplerian binary system undergoing a generic external perturbation. The method is the relativistic extension of the planetary Lagrangian equations. The theory only as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0293cfca9d07cbcf298bc12aac02e708
http://www.openaccessrepository.it/record/4524
http://www.openaccessrepository.it/record/4524
Autor:
A. Ortolan, Pierluigi Fortini
Recent measurements of the Chandra satellite have shown that a supermassive black hole of $M = 2.6 \times 10^{6} M_{\odot}$ is located in the Galactic Center; it seems probable that, from other observations, this fact is common in the majority of gal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36a2a1c3d5aa5b0213985c2e80238cf4
http://www.openaccessrepository.it/record/4268/files/0404049v4.pdf
http://www.openaccessrepository.it/record/4268/files/0404049v4.pdf
Autor:
Pierluigi Fortini, V. Martinucci, J. P. Zendri, Michele Bonaldi, G. Vedovato, L. Taffarello, Antonello Ortolan, Stefano Vitale, L. Conti, Paolo Falferi, Renato Mezzena, V. Crivelli Visconti, M. Cerdonio, L. Baggio, G. A. Prodi
Publikováno v:
Advances in Space Research. 25:1171-1176
For the first time a number of cryogenic resonant bar detectors of gravitational waves — ALLEGRO, AURIGA, EXPLORER, NAUTILUS, NIOBE — are on the air, in a continuous search for impulsive events. We present their capabilities, the foreseen upgrade
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddb0b53c6958d570ce6094a9556fccb3
https://doi.org/10.1016/s0273-1177(99)00981-3
https://doi.org/10.1016/s0273-1177(99)00981-3
Publikováno v:
International Journal of Modern Physics A. 14:3813-3830
We have studied the main features of the gravitational radiation generated by an astrophysical system constituted of three compact objects attracting one another (only via gravitational interaction) in such a manner that stable orbits do exist. We ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f6f6ab611628e82cbee5c944344d040
https://doi.org/10.1142/s0217751x99001779
https://doi.org/10.1142/s0217751x99001779
Publikováno v:
Physical Review D. 56:4610-4617
We consider true vacuum bubbles generated in a first order phase transition occurring during the slow rolling era of a two field inflation: it is known that gravitational waves are produced by the collision of such bubbles. We find that the epoch of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ef300d766aa9bb44cc2e7c6471ee9a0
https://doi.org/10.1103/physrevd.56.4610
https://doi.org/10.1103/physrevd.56.4610
Autor:
G. A. Prodi, Michele Bonaldi, G. Vedovato, A. Colombo, E. Cavallini, J. P. Zendri, S. Caruso, Stefano Vitale, Paolo Falferi, Antonello Ortolan, L. Taffarello, Massimo Cerdonio, D Carlesso, Renato Mezzena, Pierluigi Fortini, Giorgio Fontana
Publikováno v:
ResearcherID
The first run of the ultracryogenic resonant bar detector AURIGA is in progress. Diagnostics on the cryogenics, the data acquisition system and on the noise characteristics have been performed, with results in accord with the design. The bar reached
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8278ea49de496926e0c951678b4676ba
https://doi.org/10.1088/0264-9381/14/6/016
https://doi.org/10.1088/0264-9381/14/6/016
Publikováno v:
Europhysics letters
info:cnr-pdr/source/autori:Bini D., Fortini P., Geralico A., Haney M. and Ortolan A./titolo:Light scattering by radiation fields: the optical medium analogy/doi:10.1209%2F0295-5075%2F102%2F20006/rivista:Europhysics letters (Print)/anno:2013/pagina_da:20006/pagina_a:/intervallo_pagine:20006/volume:102
info:cnr-pdr/source/autori:Bini D., Fortini P., Geralico A., Haney M. and Ortolan A./titolo:Light scattering by radiation fields: the optical medium analogy/doi:10.1209%2F0295-5075%2F102%2F20006/rivista:Europhysics letters (Print)/anno:2013/pagina_da:20006/pagina_a:/intervallo_pagine:20006/volume:102
The optical medium analogy of a radiation field generated by either an exact gravitational plane wave or an exact electromagnetic wave in the framework of general relativity is developed. The equivalent medium of the associated background field is in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d3a0074a7c5262cdf1c5270b165165
Publikováno v:
Il Nuovo Cimento B. 108:459-462
The time variation of the gravitational constantG is discussed in the light of the heavy-element production in stars. This test is very sensitive and allows for an estimate of\(\left| {\dot G/G_0 } \right| \leqslant 2 \cdot 10^{ - 12} y^{ - 1} \).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f2f0dd364e0c2cec3431543ac593d88
https://doi.org/10.1007/bf02828726
https://doi.org/10.1007/bf02828726
Autor:
L. Taffarello, M. Bassan, G. Cavallari, J. Hanson, A. Rocchi, L. Baggio, Stefano Longo, Antonello Ortolan, R. Terenzi, W. O. Hamilton, G. Giordano, S. Frasca, A. Mion, L. Conti, J. P. Zendri, F.J. Ronga, G. Modestino, Andrea Carlo Marini, Damon Nettles, G. A. Prodi, Riccardo Sturani, Stefano Foffa, Martin P McHugh, G. Pizzella, Michele Maggiore, Arturo Moleti, Francesco Salemi, M. Visco, S. D'Antonio, Giovanni Vittorio Pallottino, P. Miller, Michele Bonaldi, G. Vedovato, M. Bignotto, E. Coccia, W. W. Johnson, J. Weaver, M. Drago, Pierluigi Fortini, P. Bonifazi, M. Di Paolo Emilio, Renato Mezzena, Francesco Marin, P. Zhang, N. Liguori, V. Re, Stefano Vitale, Y. Minenkov, Paolo Falferi, Andrea Vinante, Massimo Cerdonio, S. Poggi, P. Astone, V. Fafone
Publikováno v:
Physical Review. D, Vol. 82, No 2 (2010)
Physical Review D
Physical Review D, 2010, 82, ⟨10.1103/PhysRevD.82.022003⟩
Physical review. D, Particles, fields, gravitation, and cosmology 82 (2010): 022003–022011. doi:10.1103/PhysRevD.82.022003
info:cnr-pdr/source/autori:P. Astone, L. Baggio, M. Bassan, M. Bignotto, M. Bonaldi, P. Bonifazi, G. Cavallari, M. Cerdonio, E. Coccia, L. Conti, S. DAntonio, M. di Paolo Emilio, M. Drago, V. Fafone, P. Falferi, S. Foffa, P. Fortini, S. Frasca1, G. Giordano, W.O. Hamilton/titolo:IGEC2: A 17-month search for gravitational wave bursts in 2005-2007/doi:10.1103%2FPhysRevD.82.022003/rivista:Physical review. D, Particles, fields, gravitation, and cosmology/anno:2010/pagina_da:022003/pagina_a:022011/intervallo_pagine:022003–022011/volume:82
Physical Review D
Physical Review D, 2010, 82, ⟨10.1103/PhysRevD.82.022003⟩
Physical review. D, Particles, fields, gravitation, and cosmology 82 (2010): 022003–022011. doi:10.1103/PhysRevD.82.022003
info:cnr-pdr/source/autori:P. Astone, L. Baggio, M. Bassan, M. Bignotto, M. Bonaldi, P. Bonifazi, G. Cavallari, M. Cerdonio, E. Coccia, L. Conti, S. DAntonio, M. di Paolo Emilio, M. Drago, V. Fafone, P. Falferi, S. Foffa, P. Fortini, S. Frasca1, G. Giordano, W.O. Hamilton/titolo:IGEC2: A 17-month search for gravitational wave bursts in 2005-2007/doi:10.1103%2FPhysRevD.82.022003/rivista:Physical review. D, Particles, fields, gravitation, and cosmology/anno:2010/pagina_da:022003/pagina_a:022011/intervallo_pagine:022003–022011/volume:82
We present here the results of a 515 days long run of the IGEC2 observatory, consisting of the four resonant mass detectors ALLEGRO, AURIGA, EXPLORER and NAUTILUS. The reported results are related to the fourfold observation time from Nov. 6 2005 unt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84b3b3c31ed86e6745559e5cac528ea5