Spherical steady accretion flows : dependence on the cosmological constant, exact isothermal solutions, and applications to cosmology

2013
journal article
article
55
cris.lastimport.wos2024-04-09T21:30:01Z
dc.abstract.enWe investigate spherical, isothermal and polytropic steady accretion models in the presence of the cosmological constant. Exact solutions are found for three classes of isothermal fluids, assuming the test gas approximation. The cosmological constant damps the mass accretion rate and–above a certain limit–completely stops the steady accretion onto black holes. A "homoclinic-type" accretion flow of polytropic gas has been discovered in anti–de Sitter spacetimes in the test-gas limit. These results can have cosmological connotation, through the Einstein-Straus vacuole model of embedding local structures into Friedman-Lemaitre-Robertson-Walker spacetimes. In particular, one infers that steady accretion would not exist in the late phases of Penrose’s scenario of the evolution of the Universe, known as the Weyl curvature hypothesis.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.contributor.authorMach, Patryk - 159226 pl
dc.contributor.authorMalec, Edward - 130255 pl
dc.contributor.authorKarkowski, Janusz - 128673 pl
dc.date.accessioned2015-04-25T09:44:47Z
dc.date.available2015-04-25T09:44:47Z
dc.date.issued2013pl
dc.description.number8pl
dc.description.publication1pl
dc.description.volume88pl
dc.identifier.articleid084056pl
dc.identifier.doi10.1103/PhysRevD.88.084056pl
dc.identifier.eissn1550-2368pl
dc.identifier.issn1550-7998pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/5744
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
dc.rights.licencebez licencji
dc.rights.uri*
dc.subtypeArticlepl
dc.titleSpherical steady accretion flows : dependence on the cosmological constant, exact isothermal solutions, and applications to cosmologypl
dc.title.journalPhysical Review. D, Particles, Fields, Gravitation, and Cosmologypl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-09T21:30:01Z
dc.abstract.enpl
We investigate spherical, isothermal and polytropic steady accretion models in the presence of the cosmological constant. Exact solutions are found for three classes of isothermal fluids, assuming the test gas approximation. The cosmological constant damps the mass accretion rate and–above a certain limit–completely stops the steady accretion onto black holes. A "homoclinic-type" accretion flow of polytropic gas has been discovered in anti–de Sitter spacetimes in the test-gas limit. These results can have cosmological connotation, through the Einstein-Straus vacuole model of embedding local structures into Friedman-Lemaitre-Robertson-Walker spacetimes. In particular, one infers that steady accretion would not exist in the late phases of Penrose’s scenario of the evolution of the Universe, known as the Weyl curvature hypothesis.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
dc.contributor.authorpl
Mach, Patryk - 159226
dc.contributor.authorpl
Malec, Edward - 130255
dc.contributor.authorpl
Karkowski, Janusz - 128673
dc.date.accessioned
2015-04-25T09:44:47Z
dc.date.available
2015-04-25T09:44:47Z
dc.date.issuedpl
2013
dc.description.numberpl
8
dc.description.publicationpl
1
dc.description.volumepl
88
dc.identifier.articleidpl
084056
dc.identifier.doipl
10.1103/PhysRevD.88.084056
dc.identifier.eissnpl
1550-2368
dc.identifier.issnpl
1550-7998
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/5744
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Dodaję tylko opis bibliograficzny
dc.rights.licence
bez licencji
dc.rights.uri*
dc.subtypepl
Article
dc.titlepl
Spherical steady accretion flows : dependence on the cosmological constant, exact isothermal solutions, and applications to cosmology
dc.title.journalpl
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
dc.typepl
JournalArticle
dspace.entity.type
Publication

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