The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Dynamical friction-driven orbital circularisation in rotating discs: a semi-analytical description

Dynamical friction-driven orbital circularisation in rotating discs: a semi-analytical description
Dynamical friction-driven orbital circularisation in rotating discs: a semi-analytical description

We present and validate a novel semi-analytical approach to study the effect of dynamical friction (DF) on the orbits of massive perturbers in rotating stellar discs. We find that DF efficiently circularizes the orbit of co-rotating perturbers, while it constantly increases the eccentricity of counter-rotating ones until their angular momenta reverse, then once again promoting circularization. Such ‘drag toward circular co-rotation’ could shape the distribution of orientations of kinematically decoupled cores in disc galaxies, naturally leading to the observed larger fraction of co-rotating cores.

Galaxies: nuclei, Galaxies: structure, Gravitation, Methods: numerical, Stars: kinematics and dynamics
0035-8711
3053-3059
Bonetti, Matteo
e1df0788-3bca-4629-8f4a-f59b6ce89f66
Bortolas, Elisa
ad54eb0b-4c03-46b3-915a-7bf4edd6b1cb
Lupi, Alessandro
0d4472d8-c68c-415e-afd3-d825c2b6250f
Dotti, Massimo
0e4d7886-18eb-452e-a69f-5bb3e963ceda
De Jesus Raimundo, Sandra
e409d9d3-17e8-4049-ad29-43ada60b24e2
Bonetti, Matteo
e1df0788-3bca-4629-8f4a-f59b6ce89f66
Bortolas, Elisa
ad54eb0b-4c03-46b3-915a-7bf4edd6b1cb
Lupi, Alessandro
0d4472d8-c68c-415e-afd3-d825c2b6250f
Dotti, Massimo
0e4d7886-18eb-452e-a69f-5bb3e963ceda
De Jesus Raimundo, Sandra
e409d9d3-17e8-4049-ad29-43ada60b24e2

Bonetti, Matteo, Bortolas, Elisa, Lupi, Alessandro, Dotti, Massimo and De Jesus Raimundo, Sandra (2020) Dynamical friction-driven orbital circularisation in rotating discs: a semi-analytical description. Monthly Notices of the Royal Astronomical Society, 494 (2), 3053-3059. (doi:10.1093/mnras/staa964).

Record type: Article

Abstract

We present and validate a novel semi-analytical approach to study the effect of dynamical friction (DF) on the orbits of massive perturbers in rotating stellar discs. We find that DF efficiently circularizes the orbit of co-rotating perturbers, while it constantly increases the eccentricity of counter-rotating ones until their angular momenta reverse, then once again promoting circularization. Such ‘drag toward circular co-rotation’ could shape the distribution of orientations of kinematically decoupled cores in disc galaxies, naturally leading to the observed larger fraction of co-rotating cores.

Text
Dynamical friction-driven orbital circularisation in rotating discs a semi-analytical description - Accepted Manuscript
Download (646kB)

More information

Accepted/In Press date: 20 March 2020
e-pub ahead of print date: 15 April 2020
Published date: 11 May 2020
Keywords: Galaxies: nuclei, Galaxies: structure, Gravitation, Methods: numerical, Stars: kinematics and dynamics

Identifiers

Local EPrints ID: 444016
URI: http://eprints.soton.ac.uk/id/eprint/444016
ISSN: 0035-8711
PURE UUID: 09a2279b-961f-45eb-9f95-7730d65486f5

Catalogue record

Date deposited: 22 Sep 2020 16:31
Last modified: 25 Nov 2021 20:37

Export record

Altmetrics

Contributors

Author: Matteo Bonetti
Author: Elisa Bortolas
Author: Alessandro Lupi
Author: Massimo Dotti

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×