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- Publisher Website: 10.1103/PhysRevD.79.064001
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Article: Thin accretion disks in stationary axisymmetric wormhole spacetimes
Title | Thin accretion disks in stationary axisymmetric wormhole spacetimes | ||||||||
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Authors | |||||||||
Keywords | Physics Nuclear physics | ||||||||
Issue Date | 2009 | ||||||||
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prd/ | ||||||||
Citation | Physical Review D (Particles, Fields, Gravitation and Cosmology), 2009, v. 79 n. 6, article no. 064001 How to Cite? | ||||||||
Abstract | In this paper, we study the physical properties and the equilibrium thermal radiation emission characteristics of matter forming thin accretion disks in stationary axially symmetric wormhole spacetimes. The thin disk models are constructed by taking different values of the wormhole's angular velocity, and the time averaged energy flux, the disk temperature, and the emission spectra of the accretion disks are obtained. Comparing the mass accretion in a rotating wormhole geometry with the one of a Kerr black hole, we verify that the intensity of the flux emerging from the disk surface is greater for wormholes than for rotating black holes with the same geometrical mass and accretion rate. We also present the conversion efficiency of the accreting mass into radiation, and show that the rotating wormholes provide a much more efficient engine for the transformation of the accreting mass into radiation than the Kerr black holes. Therefore specific signatures appear in the electromagnetic spectrum of thin disks around rotating wormholes, thus leading to the possibility of distinguishing wormhole geometries by using astrophysical observations of the emission spectra from accretion disks. © 2009 The American Physical Society. | ||||||||
Persistent Identifier | http://hdl.handle.net/10722/59582 | ||||||||
ISSN | 2014 Impact Factor: 4.643 | ||||||||
ISI Accession Number ID |
Funding Information: The work of T. H. is supported by an RGC grant of the government of the Hong Kong SAR. Z. K. was supported by the Hungarian Scientific Research Fund (OTKA) Grant No. 69036. F. S. N. L. was partially funded by Fundacao para a Ciencia e a Tecnologia (FCT)-Portugal through the Grant No. SFRH/BPD/26269/2006. |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Harko, T | en_HK |
dc.contributor.author | Kovacs, Z | en_HK |
dc.contributor.author | Lobo, FSN | en_HK |
dc.date.accessioned | 2010-05-31T03:53:13Z | - |
dc.date.available | 2010-05-31T03:53:13Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | Physical Review D (Particles, Fields, Gravitation and Cosmology), 2009, v. 79 n. 6, article no. 064001 | - |
dc.identifier.issn | 1550-7998 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/59582 | - |
dc.description.abstract | In this paper, we study the physical properties and the equilibrium thermal radiation emission characteristics of matter forming thin accretion disks in stationary axially symmetric wormhole spacetimes. The thin disk models are constructed by taking different values of the wormhole's angular velocity, and the time averaged energy flux, the disk temperature, and the emission spectra of the accretion disks are obtained. Comparing the mass accretion in a rotating wormhole geometry with the one of a Kerr black hole, we verify that the intensity of the flux emerging from the disk surface is greater for wormholes than for rotating black holes with the same geometrical mass and accretion rate. We also present the conversion efficiency of the accreting mass into radiation, and show that the rotating wormholes provide a much more efficient engine for the transformation of the accreting mass into radiation than the Kerr black holes. Therefore specific signatures appear in the electromagnetic spectrum of thin disks around rotating wormholes, thus leading to the possibility of distinguishing wormhole geometries by using astrophysical observations of the emission spectra from accretion disks. © 2009 The American Physical Society. | - |
dc.language | eng | en_HK |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prd/ | - |
dc.relation.ispartof | Physical Review D (Particles, Fields, Gravitation and Cosmology) | - |
dc.rights | Copyright 2009 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevD.79.064001 | - |
dc.subject | Physics | - |
dc.subject | Nuclear physics | - |
dc.title | Thin accretion disks in stationary axisymmetric wormhole spacetimes | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1550-7998&volume=79&spage=064001&epage=&date=2009&atitle=Thin+accretion+disks+in+stationary+axisymmetric+wormhole+spacetimes | en_HK |
dc.identifier.email | Harko, T: harko@hkucc.hku.hk | en_HK |
dc.identifier.email | Lobo, FSN: francisco.lobo@port.ac.uk | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevD.79.064001 | - |
dc.identifier.scopus | eid_2-s2.0-63149112752 | - |
dc.identifier.hkuros | 163434 | en_HK |
dc.identifier.volume | 79 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | article no. 064001 | - |
dc.identifier.epage | article no. 064001 | - |
dc.identifier.isi | WOS:000264762500048 | - |
dc.identifier.issnl | 1550-2368 | - |