Theoretical astrophysics and plasma physics at RPC

Research group

Research theme

Sub department

About

Related research groups

Dynamical models and Galaxy surveys

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 9:S298 (2013) 117-129

Authors:

James Binney, Jason L Sanders

Abstract:

AbstractEquilibrium dynamical models are essential tools for extracting science from surveys of our Galaxy. We show how models can be tested with data from a survey before the survey's selection function has been determined. We illustrate the application of this method by presenting some results for the RAVE survey. We extend our published analytic distribution functions to include chemistry and fit the chosen functional form to a combination of the Geneva–Copenhagen survey (GCS) and a sample of G-dwarfs observed atz~ 1.75 kpc by the SEGUE survey. By including solid dynamics we are able to predict the contribution that the thick disc/halo stars surveyed by SEGUE should make to the GCS survey. We show that the measured [Fe/H] distribution from the GCS includes many fewer stars at [Fe/H] < −0.6 than are predicted. The problem is more likely to lie in discordant abundance scales than with incorrect dynamics.
More details from the publisher
More details
Details from ArXiV

Intrinsic rotation driven by non-Maxwellian equilibria in tokamak plasmas

(2013)

Authors:

M Barnes, FI Parra, JP Lee, EA Belli, MFF Nave, AE White
More details from the publisher

Ripple effects & oscillations in the broad FeKa line as a probe of massive black hole mergers

(2013)

Authors:

B McKernan, KES Ford, B Kocsis, Z Haiman
More details from the publisher

Bayes versus the virial theorem: inferring the potential of a galaxy from a kinematical snapshot

(2013)
More details from the publisher

Three-dimensional Keplerian orbit-superposition models of the nucleus of M31

(2013)

Authors:

Calum K Brown, John Magorrian
More details from the publisher