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Understanding planes of satellites

Published online by Cambridge University Press:  30 October 2019

I. Santos-Santos ,
H. Artal ,
R. Domínguez-Tenreiro ,
P. B. Tissera ,
S. E. Pedrosa ,
M. A. Gómez-Flechoso ,
C. B. Brook ,
L. Bignone  and
A. Serna
I. Santos-Santos
Affiliation:
Dpto. Física Teórica & CIAFF, Univ. Autónoma de Madrid, Madrid, Spain, email: isabelm.santos@uam.es
H. Artal
Affiliation:
Next Limit SL
R. Domínguez-Tenreiro
Affiliation:
Dpto. Física Teórica & CIAFF, Univ. Autónoma de Madrid, Madrid, Spain, email: isabelm.santos@uam.es
P. B. Tissera
Affiliation:
Dpto. Ciencias Físicas, Univ. Andrés Bello, Santiago, Chile
S. E. Pedrosa
Affiliation:
Instituto de Astronomía y Física del Espacio, Buenos Aires, Argentina
M. A. Gómez-Flechoso
Affiliation:
Dpto. Física de la Tierra y Astrofísica, Univ. Complutense de Madrid, Madrid, Spain
C. B. Brook
Affiliation:
Instituto Astrofísico de Canarias & Univ. de la Laguna, Tenerife, Spain
L. Bignone
Affiliation:
Dpto. Ciencias Físicas, Univ. Andrés Bello, Santiago, Chile
A. Serna
Affiliation:
Dpto. de Física y A.C., Univ. Miguel Hernández, Elche, Spain
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Abstract

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Reproducing the planes of co-orbiting satellites observed in the MW and M31 so far has represented a challenge for cosmological simulations. We have developed a new method to search for kinematically-coherent groups of satellites and applied it to 2 different cosmological hydro-simulations of disc galaxies. In each simulation we have found such a group, that represents roughly half of the total satellite population and is distributed on a fairly thin plane that persists in time. These results are compatible with the MW and M31 observed planes.

Keywords

galaxies: dwarfformationevolutioncosmology: theoryobservations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 477 - 480
Copyright
© International Astronomical Union 2019 

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