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Motion of halo tracer objects in the gravitational potential of a low-mass model of the Galaxy

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Motion of halo tracer objects in the gravitational potential of a low-mass model of the Galaxy

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dc.contributor.author Sikora, Szymon [SAP14012983] pl
dc.contributor.author Bratek, Łukasz pl
dc.contributor.author Jałocha, Joanna [USOS59428] pl
dc.contributor.author Kutschera, Marek [SAP11116629] pl
dc.date.accessioned 2015-11-19T10:41:51Z
dc.date.available 2015-11-19T10:41:51Z
dc.date.issued 2015 pl
dc.identifier.issn 0004-6361 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/16913
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Na tych samych warunkach 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/pl/legalcode *
dc.title Motion of halo tracer objects in the gravitational potential of a low-mass model of the Galaxy pl
dc.type JournalArticle pl
dc.description.additional Reproduced with permission from Astronomy & Astrophysics, © ESO pl
dc.abstract.en Recently, we determined a lower bound for the Milky Way mass in a point mass approximation. We obtain this result for most general spherically symmetric phase-space distribution functions consistent with a measured radial velocity dispersion. As a stability test of these predictions against a perturbation of the point mass potential, in this paper we make use of a representative of these functions to set the initial conditions for a simulation in a more realistic potential of similar mass and to account for other observations. The predicted radial velocity dispersion profile evolves to forms still consistent with the measured profile, proving structural stability of the point mass approximation and the reliability of the resulting mass estimate of $\sim 2.1 \times 10^{11} M_{\bigodot }$ within 150 kpc. As a byproduct, we derive a formula in the spherical symmetry relating the radial velocity dispersion profile to a directly measured kinematical observable. pl
dc.subject.en Galaxy: fundamental parameters pl
dc.subject.en Galaxy: halo pl
dc.subject.en Galaxy: kinematics and dynamics pl
dc.subject.en methods: numerical pl
dc.subject.en techniques: radial velocities pl
dc.description.volume 579 pl
dc.identifier.doi 10.1051/0004-6361/201526189 pl
dc.identifier.eissn 1432-0746 pl
dc.title.journal Astronomy & Astrophysics pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne pl
dc.subtype Article pl
dc.identifier.articleid A134 pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; po opublikowaniu; 12 pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2015 A]: 35


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Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Na tych samych warunkach 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Na tych samych warunkach 4.0 Międzynarodowa