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Verfasst von:Mazzarini, Matteo [VerfasserIn]   i
 Just, Andreas [VerfasserIn]   i
 Macciò, Andrea V. [VerfasserIn]   i
 Moetazedian, Reza [VerfasserIn]   i
Titel:Simulations of satellite tidal debris in the Milky Way halo
Verf.angabe:Matteo Mazzarini, Andreas Just, Andrea V. Macciò, and Reza Moetazedian
E-Jahr:2020
Jahr:27 April 2020
Umfang:12 S.
Teil:volume:636
 year:2020
 extent:12
Fussnoten:Gesehen am 03.06.2020
Titel Quelle:Enthalten in: Astronomy and astrophysics
Ort Quelle:Les Ulis : EDP Sciences, 1969
Jahr Quelle:2020
Band/Heft Quelle:636(2020) Artikel-Nummer A106, 12 Seiten
ISSN Quelle:1432-0746
Abstract:<i>Aims.<i/> We study the distribution of the stellar and dark matter debris of the Milky Way satellites.<i>Methods.<i/> For the first time we address the question of the tidal disruption of satellites in simulations by utilising simultaneously (a) a realistic set of orbits extracted from cosmological simulations; (b) a three-component host galaxy with live halo, disc, and bulge components; and (c) satellites from hydrodynamical simulations. We analyse the statistical properties of the satellite debris of all massive galaxies reaching the inner Milky Way on a timescale of 2 Gyr.<i>Results.<i/> Up to 80% of the dark matter is stripped from the satellites, while this happens for up to 30% of their stars. The stellar debris ends mostly in the inner Milky Way halo, whereas the dark matter debris shows a flat mass distribution over the full main halo. The dark matter debris follows a density profile with inner power law index <i>α<i/><sub>DM<sub/> = −0.66 and outer index <i>β<i/><sub>DM<sub/> = 2.94, while for stars <i>α<i/><sub>*<sub/> = −0.44 and <i>β<i/><sub>*<sub/> = 6.17. In the inner 25 kpc the distribution of the stellar debris is flatter than that of the dark matter debris, and the orientations of their short axes differ significantly. Changing the orientation of the stellar disc by 90° has a minor impact on the distribution of the satellite debris.<i>Conclusions.<i/> Our results indicate that dark matter is more easily stripped than stars from the Milky Way satellites. The structure of the debris is dominated by the satellite orbital properties. The radial profiles, the flattening, and the orientation of the stellar and dark matter debris are significantly different, which prevents the prediction of the dark matter distribution from the observed stellar component.
DOI:doi:10.1051/0004-6361/202037558
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1051/0004-6361/202037558
 Volltext: https://www.aanda.org/articles/aa/abs/2020/04/aa37558-20/aa37558-20.html
 DOI: https://doi.org/10.1051/0004-6361/202037558
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1699271798
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