UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

A PRIMAL view of the Milky Way, made possible by Gaia and M2M modelling

Hunt, JAS; Kawata, D; (2014) A PRIMAL view of the Milky Way, made possible by Gaia and M2M modelling. EAS Publications Series , 67-68 pp. 83-86. 10.1051/eas/1567014. Green open access

[thumbnail of Kawata_eas1567014.pdf]
Preview
Text
Kawata_eas1567014.pdf - Published Version

Download (303kB) | Preview

Abstract

We have developed our original made-to-measure (M2M) algorithm, PRIMAL, with the aim of modelling the Galactic disc from upcoming Gaia data. From a Milky Way like N-body disc galaxy simulation, we have created mock Gaia data using M0III stars as tracers, taking into account extinction and the expected Gaia errors. In PRIMAL, observables calculated from the N-body model are compared with the target stars, at the position of the target stars. Using PRIMAL, the masses of the N-body model particles are changed to reproduce the target mock data, and the gravitational potential is automatically adjusted by the changing mass of the model particles. We have also adopted a new resampling scheme for the model particles to keep the mass resolution of the N-body model relatively constant. We have applied PRIMAL to this mock Gaia data and we show that PRIMAL can recover the structure and kinematics of a Milky Way like barred spiral disc, along with the apparent bar structure and pattern speed of the bar despite the galactic extinction and the observational errors.

Type: Article
Title: A PRIMAL view of the Milky Way, made possible by Gaia and M2M modelling
Open access status: An open access version is available from UCL Discovery
DOI: 10.1051/eas/1567014
Publisher version: http://dx.doi.org/10.1051/eas/1567014
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/1518033
Downloads since deposit
77Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item