Understanding planes of satellites

I. Santos-Santos, R. Domínguez-Tenreiro, H. Artal, A. Serna, M. A. Gómez-Flechoso, C. Brook, P. Tissera, S. Pedrosa, L. Bignone

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Planes of satellites are observed in the Milky Way and Andromeda, and recent observations claim their presence as well in other nearby galactic systems. Moreover, recent proper motion data of MW satellites allege an important fraction of satellites are co-orbiting within the plane they define. However, the quality and degree of co-orbitation of the planes of satellites reported so far from simulations within a ?CDM context have been insufficient to explain the observational data. In order to further understand the origin of planes of satellites we have carried out a detailed study of planes of satellites in zoom-in cosmological hydro-simulations of disc galaxies, focusing on plane-finding methods and plane quality analyses. We report on a method to identify kinematically-coherent satellites based on their orbital angular momentum vectors. We find a group of co-orbiting satellites in the PDEVA-5004 simulation that forms a persistent planar structure across cosmic time, with characteristics compatible with those of the observed planes in the MW and M31.

Original languageEnglish
Title of host publicationProceedings of the 13th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics X, SEA 2018
EditorsB. Montesinos, A. Asensio Ramos, F. Buitrago, R. Schodel, E. Villaver, S. Perez-Hoyos, I. Ordonez-Etxeberria
PublisherDauphin Island Sea Lab
Pages173-179
Number of pages7
ISBN (Electronic)9788409093311
Publication statusPublished - 2018
Event13th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics X, SEA 2018 - Salamanca, Spain
Duration: 16 Jul 201820 Jul 2018

Publication series

NameProceedings of the 13th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics X, SEA 2018

Conference

Conference13th Scientific Meeting of the Spanish Astronomical Society - Highlights of Spanish Astrophysics X, SEA 2018
Country/TerritorySpain
CitySalamanca
Period16/07/1820/07/18

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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