THE EFFICIENCY OF GRAVITATIONAL BREMSSTRAHLUNG PRODUCTION IN THE COLLISION OF TWO SCHWARZSCHILD BLACK HOLES.
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| Title: | THE EFFICIENCY OF GRAVITATIONAL BREMSSTRAHLUNG PRODUCTION IN THE COLLISION OF TWO SCHWARZSCHILD BLACK HOLES. |
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| Authors: | ARANHA, R. F.1 rfaranha@cbpf.br, DE OLIVEIRA, H. P.2 oliveira@dft.if.uerj.br, DAMIÃO SOARES, I.1 ivano@cbpf.br, TONINI, E. V.3 tonini@cefetes.br |
| Source: | International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology. Oct2008, Vol. 17 Issue 11, p2049-2064. 16p. 1 Diagram, 3 Graphs. |
| Subjects: | Gravitational collapse, Supermassive black holes, Bremsstrahlung, Nuclear reactions, Radiation |
| Abstract: | In this paper, we examine the efficiency of gravitational bremsstrahlung production in the process of head-on collision of two boosted Schwarzschild black holes. We construct initial data for the characteristic initial value problem in Robinson–Trautman space–times, which represent two instantaneously stationary Schwarzschild black holes in motion toward each other with the same velocity. The Robinson–Trautman equation is integrated for these initial data using a numerical code based on the Galerkin method. The resulting final configuration is a boosted black hole with Bondi mass greater than the sum of the individual masses of the individual initial black holes. Two relevant aspects of the process are presented. The first relates the efficiency Δ of the energy extraction by gravitational wave emission to the mass of the final black hole. This relation is fitted by a distribution function of nonextensive thermostatistics with entropic parameter q ≃ 1/2; the result extends and validates analysis based on the linearized theory of gravitational wave emission. The second aspect is a typical bremsstrahlung angular pattern in the early period of emission at the wave zone, a consequence of the deceleration of the black holes as they coalesce; this pattern evolves to a quadrupole form for later times. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 35528805 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: THE EFFICIENCY OF GRAVITATIONAL BREMSSTRAHLUNG PRODUCTION IN THE COLLISION OF TWO SCHWARZSCHILD BLACK HOLES. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22ARANHA%2C+R%2E+F%2E%22">ARANHA, R. F.</searchLink><relatesTo>1</relatesTo><i> rfaranha@cbpf.br</i><br /><searchLink fieldCode="AR" term="%22DE+OLIVEIRA%2C+H%2E+P%2E%22">DE OLIVEIRA, H. P.</searchLink><relatesTo>2</relatesTo><i> oliveira@dft.if.uerj.br</i><br /><searchLink fieldCode="AR" term="%22DAMIÃO+SOARES%2C+I%2E%22">DAMIÃO SOARES, I.</searchLink><relatesTo>1</relatesTo><i> ivano@cbpf.br</i><br /><searchLink fieldCode="AR" term="%22TONINI%2C+E%2E+V%2E%22">TONINI, E. V.</searchLink><relatesTo>3</relatesTo><i> tonini@cefetes.br</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Modern+Physics+D%3A+Gravitation%2C+Astrophysics+%26+Cosmology%22">International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology</searchLink>. Oct2008, Vol. 17 Issue 11, p2049-2064. 16p. 1 Diagram, 3 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Gravitational+collapse%22">Gravitational collapse</searchLink><br /><searchLink fieldCode="DE" term="%22Supermassive+black+holes%22">Supermassive black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Bremsstrahlung%22">Bremsstrahlung</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactions%22">Nuclear reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Radiation%22">Radiation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this paper, we examine the efficiency of gravitational bremsstrahlung production in the process of head-on collision of two boosted Schwarzschild black holes. We construct initial data for the characteristic initial value problem in Robinson–Trautman space–times, which represent two instantaneously stationary Schwarzschild black holes in motion toward each other with the same velocity. The Robinson–Trautman equation is integrated for these initial data using a numerical code based on the Galerkin method. The resulting final configuration is a boosted black hole with Bondi mass greater than the sum of the individual masses of the individual initial black holes. Two relevant aspects of the process are presented. The first relates the efficiency Δ of the energy extraction by gravitational wave emission to the mass of the final black hole. This relation is fitted by a distribution function of nonextensive thermostatistics with entropic parameter q ≃ 1/2; the result extends and validates analysis based on the linearized theory of gravitational wave emission. The second aspect is a typical bremsstrahlung angular pattern in the early period of emission at the wave zone, a consequence of the deceleration of the black holes as they coalesce; this pattern evolves to a quadrupole form for later times. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1142/S0218271808013704 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 2049 Subjects: – SubjectFull: Gravitational collapse Type: general – SubjectFull: Supermassive black holes Type: general – SubjectFull: Bremsstrahlung Type: general – SubjectFull: Nuclear reactions Type: general – SubjectFull: Radiation Type: general Titles: – TitleFull: THE EFFICIENCY OF GRAVITATIONAL BREMSSTRAHLUNG PRODUCTION IN THE COLLISION OF TWO SCHWARZSCHILD BLACK HOLES. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: ARANHA, R. F. – PersonEntity: Name: NameFull: DE OLIVEIRA, H. P. – PersonEntity: Name: NameFull: DAMIÃO SOARES, I. – PersonEntity: Name: NameFull: TONINI, E. V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 02182718 Numbering: – Type: volume Value: 17 – Type: issue Value: 11 Titles: – TitleFull: International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology Type: main |
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