Planes of Satellites around Simulated Disk Galaxies. II. Time-persistent Planes of Kinematically Coherent Satellites in ?CDM

Simple item page
dc.contributor.authorSantos-Santos, Isabel
dc.contributor.authorGamez-Marin, Matias
dc.contributor.authorDominguez-Tenreiro, Rosa
dc.contributor.authorTissera, Patricia B.
dc.contributor.authorBignone, Lucas
dc.contributor.authorPedrosa, Susana E.
dc.contributor.authorArtal, Hector
dc.contributor.authorGomez-Flechoso, M. Angeles
dc.contributor.authorRufo-Pastor, Victor
dc.contributor.authorMartinez-Serrano, Francisco
dc.contributor.authorSerna, Arturo
dc.date.accessioned2025-01-20T20:18:25Z
dc.date.available2025-01-20T20:18:25Z
dc.date.issued2023
dc.description.abstractWe use two zoom-in ?CDM hydrodynamical simulations of massive disk galaxies to study the possible existence of fixed satellite groups showing a kinematically coherent behavior across evolution (angular momentum conservation and clustering). We identify three such groups in the two simulations, defining kinematically coherent persistent planes (KPPs) that last at least from virialization to z = 0 (more than 7 Gyr). This proves that orbital pole clustering is not necessarily set in at low redshift, representing a long-lived property of galaxy systems. KPPs are thin and oblate, represent similar to 25%-40% of the total number of satellites in the system, and are roughly perpendicular to their corresponding central disk galaxies during certain periods, consistently with Milky Way z = 0 data. KPP satellite members are statistically distinguishable from satellites outside KPPs: they show higher specific orbital angular momenta, orbit more perpendicularly to the central disk galaxy, and have larger pericentric distances than the latter. We numerically prove, for the first time, that KPPs and the best-quality positional planes share the same space configuration across time, such that KPPs act as "skeletons" preventing the latter from being washed out in short timescales. In one of the satellite-host systems, we witness the late capture of a massive dwarf galaxy endowed with its own satellite system, also organized into a KPP configuration prior to its capture. We briefly explore the consequences this event has on the host's KPP and on the possible enhancement of the asymmetry in the number of satellites rotating in one sense or the opposite within the KPP.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/aca1c8
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/aca1c8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92461
dc.identifier.wosidWOS:000920119400001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titlePlanes of Satellites around Simulated Disk Galaxies. II. Time-persistent Planes of Kinematically Coherent Satellites in ?CDM
dc.typeartículo
dc.volumen942
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas