The role of large-scale magnetic fields in galaxy NGC 891 : can magnetic fields help to reduce the local mass-to-light ratio in the galactic outskirts?

2012
journal article
article
8
dc.abstract.enWe address the problem of the influence of large-scale magnetic fields on galactic rotation for the example of the spiral galaxy NGC 891. Based on its rotation curve and the surface density of H i we determine, in the framework of the global disc model, the surface density of matter. Then, based on the surface brightness, we determine the corresponding profile of the local mass-to-light ratio. We also model the vertical gradient of azimuthal velocity in the quasi-circular-orbit approximation, and compare it with measurements. We discuss what factors may influence the rotation of matter in NGC 891 and how this can translate to changes in the profile of the local mass-to-light ratio. In particular, we discuss the possible effect of magnetic fields on the motion of ionized gas, and, consequently, on the determination of the profile of the local mass-to-light ratio. Finally, we put forward the hypothesis that the asymmetry in magnetic fields observed in NGC 891 might be responsible for the observed anomalous behaviour of the vertical gradient.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiegopl
dc.contributor.authorJałocha, Joannapl
dc.contributor.authorBratek, Łukaszpl
dc.contributor.authorPȩkala, Janpl
dc.contributor.authorKutschera, Marek - 129807 pl
dc.date.accessioned2016-05-18T12:12:29Z
dc.date.available2016-05-18T12:12:29Z
dc.date.issued2012pl
dc.date.openaccess36
dc.description.accesstimepo opublikowaniu
dc.description.number3pl
dc.description.physical2155-2160pl
dc.description.publication0,3pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume421pl
dc.identifier.doi10.1111/j.1365-2966.2012.20447.xpl
dc.identifier.eissn1365-2966pl
dc.identifier.issn0035-8711pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/26385
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
dc.rights.licenceOTHER
dc.rights.uri*
dc.share.typeinne
dc.subject.engalaxies: individual: NGC 891pl
dc.subject.engalaxies: kinematics and dynamicspl
dc.subject.engalaxies: magnetic fieldspl
dc.subject.engalaxies: spiralpl
dc.subject.engalaxies: structurepl
dc.subtypeArticlepl
dc.titleThe role of large-scale magnetic fields in galaxy NGC 891 : can magnetic fields help to reduce the local mass-to-light ratio in the galactic outskirts?pl
dc.title.journalMonthly Notices of the Royal Astronomical Societypl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
We address the problem of the influence of large-scale magnetic fields on galactic rotation for the example of the spiral galaxy NGC 891. Based on its rotation curve and the surface density of H i we determine, in the framework of the global disc model, the surface density of matter. Then, based on the surface brightness, we determine the corresponding profile of the local mass-to-light ratio. We also model the vertical gradient of azimuthal velocity in the quasi-circular-orbit approximation, and compare it with measurements. We discuss what factors may influence the rotation of matter in NGC 891 and how this can translate to changes in the profile of the local mass-to-light ratio. In particular, we discuss the possible effect of magnetic fields on the motion of ionized gas, and, consequently, on the determination of the profile of the local mass-to-light ratio. Finally, we put forward the hypothesis that the asymmetry in magnetic fields observed in NGC 891 might be responsible for the observed anomalous behaviour of the vertical gradient.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
dc.contributor.authorpl
Jałocha, Joanna
dc.contributor.authorpl
Bratek, Łukasz
dc.contributor.authorpl
Pȩkala, Jan
dc.contributor.authorpl
Kutschera, Marek - 129807
dc.date.accessioned
2016-05-18T12:12:29Z
dc.date.available
2016-05-18T12:12:29Z
dc.date.issuedpl
2012
dc.date.openaccess
36
dc.description.accesstime
po opublikowaniu
dc.description.numberpl
3
dc.description.physicalpl
2155-2160
dc.description.publicationpl
0,3
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
421
dc.identifier.doipl
10.1111/j.1365-2966.2012.20447.x
dc.identifier.eissnpl
1365-2966
dc.identifier.issnpl
0035-8711
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/26385
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Dodaję tylko opis bibliograficzny
dc.rights.licence
OTHER
dc.rights.uri*
dc.share.type
inne
dc.subject.enpl
galaxies: individual: NGC 891
dc.subject.enpl
galaxies: kinematics and dynamics
dc.subject.enpl
galaxies: magnetic fields
dc.subject.enpl
galaxies: spiral
dc.subject.enpl
galaxies: structure
dc.subtypepl
Article
dc.titlepl
The role of large-scale magnetic fields in galaxy NGC 891 : can magnetic fields help to reduce the local mass-to-light ratio in the galactic outskirts?
dc.title.journalpl
Monthly Notices of the Royal Astronomical Society
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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