dc.contributor.author | Cherkas, Sergey L. | |
dc.contributor.author | Kalashnikov, Vladimir | |
dc.date.accessioned | 2023-03-06T14:44:00Z | |
dc.date.available | 2023-03-06T14:44:00Z | |
dc.date.created | 2022-10-12T14:28:40Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Universe. 2022, 8 (9), . | en_US |
dc.identifier.issn | 2218-1997 | |
dc.identifier.uri | https://hdl.handle.net/11250/3056168 | |
dc.description.abstract | We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state p=ρ/3, similar to radiation. Using the conformally unimodular metric allows us to construct a non-singular solution for this vacuum “substance” if a compact astrophysical object exists in the galaxy’s center. As a result, a “dark” galactical halo appears that increases the rotation velocity of a test particle as a function of the distance from a galactic center. The second type of vacuum polarization has a more complicated equation of state. As a static physical effect, it produces the renormalization of the gravitational constant, thus, causing no static halo. However, a non-stationary polarization of the second type, resulting from an exponential increase (or decrease) of the galactic nuclei mass with time in some hypothetical time-dependent process, produces a gravitational potential, appearing similar to a dark matter halo. | |
dc.language.iso | eng | en_US |
dc.publisher | MDPI | |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.title | Vacuum Polarization Instead of “Dark Matter” in a Galaxy | en_US |
dc.title.alternative | Vacuum Polarization Instead of “Dark Matter” in a Galaxy | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.source.pagenumber | 0 | en_US |
dc.source.volume | 8 | en_US |
dc.source.journal | Universe | en_US |
dc.source.issue | 9 | en_US |
dc.identifier.doi | 10.3390/universe8090456 | |
dc.identifier.cristin | 2060871 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |