Applying scale-free mass estimators to the Local Group in Constrained Local Universe Simulations

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dc.contributor.author Di Cintio, Arianna
dc.contributor.author Knebe, Alexander
dc.contributor.author Libeskind, Noam I.
dc.contributor.author Hoffman, Yehuda
dc.contributor.author Yepes, Gustavo
dc.contributor.author Gottlöber, Stefan
dc.contributor.other UAM. Departamento de Física Teórica es_ES
dc.date.accessioned 2015-06-08T11:16:05Z
dc.date.available 2015-06-08T11:16:05Z
dc.date.issued 2012-06-01
dc.identifier.citation Monthly Notices of the Royal Astronomical Society 423.2 (2012): 1883-1895 en_US
dc.identifier.issn 0035-8711 (print) en
dc.identifier.issn 1365-2966 (online) en
dc.identifier.uri http://hdl.handle.net/10486/666625
dc.description This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 RAS © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. en_US
dc.description.abstract We use the recently proposed scale-free mass estimators to determine the masses of the Milky Way (MW) and Andromeda (M31) galaxy in a dark matter only Constrained Local Universe Simulation. While these mass estimators work rather well for isolated spherical host systems, we examine here their applicability to a simulated binary system with a unique satellite population similar to the observed satellites of MW and M31. We confirm that the scale-free estimators work also very well in our simulated Local Group galaxies with the right number of satellites which follow the observed radial distribution. In the isotropic case and under the assumption that the satellites are tracking the total gravitating mass, the power-law index of the radial satellite distribution N(< r) ∝ r 3-γ is directly related to the host's mass profile M(< r) ∝ r 1-α as α=γ- 2. The use of this relation for any given γ leads to highly accurate mass estimations which is a crucial point for observer, since they do not know a priori the mass profile of the MW and M31 haloes. We discuss possible bias in the mass estimators and conclude that the scale-free mass estimators can be satisfactorily applied to the real MW and M31 system en_US
dc.description.sponsorship YH has been partially supported by the Israel Science Foundation (13/08). NIL is supported by a grant by the Deutsche Forschungs Gemeinschaft. AKis supported by the Spanish Ministerio de Ciencia e Innovación (MICINN) in Spain through the Ramón y Cajal programme as well as the grants AYA 2009-13875-C03-02, AYA2009-12792-C03-03, CSD2009-00064 and CAM S2009/ESP-1496. GY acknowledges support from MICINN under research grants AYA2009-13875-C03-02, FPA2009-08958 and Consolider Ingenio SyeC CSD2007-0050. en_US
dc.format.extent 13 pag. en
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher Royal Astronomical Society en_US
dc.publisher Oxford University Press en_US
dc.relation.ispartof Monthly Notices of the Royal Astronomical Society en_US
dc.rights © 2012 RAS en_US
dc.rights © 2012 The Authors en_US
dc.subject.other Dark matter en_US
dc.subject.other Galaxies: haloes en_US
dc.subject.other Local Group en_US
dc.subject.other Methods: numerical en_US
dc.subject.other Galaxies: evolution en_US
dc.title Applying scale-free mass estimators to the Local Group in Constrained Local Universe Simulations en_US
dc.type article en
dc.subject.eciencia Física es_ES
dc.relation.publisherversion http://dx.doi.org/10.1111/j.1365-2966.2012.21013.x es_ES
dc.identifier.doi 10.1111/j.1365-2966.2012.21013.x es_ES
dc.identifier.publicationfirstpage 1883 es_ES
dc.identifier.publicationissue 2 es_ES
dc.identifier.publicationlastpage 1895 es_ES
dc.identifier.publicationvolume 423 es_ES
dc.relation.projectID Comunidad de Madrid S2009/ESP-1496/ASTROMADRID es_ES
dc.type.version info:eu-repo/semantics/publishedVersion en
dc.rights.accessRights openAccess en
dc.authorUAM Knebe , Alexander (262044)
dc.authorUAM Yepes Alonso, Gustavo (260625)
dc.authorUAM Di Cintio , Arianna (262322)


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