Institute of Astronomy

- Andrew Everall


Office: Hoyle H27
Office Tel: (01223) 766653
More Info (Internal)



I am interested in the distribution of dark matter in the Milky Way and the implications this has for particle physics and cosmology. I investigate this using dynamical models of visible stars observed by the ESA’s Gaia mission. I have a complimentary interest in statistical biases in large astronomical data sets with Bayesian modelling.

I am co-PI of the 'Completeness of the Gaia-verse' project with the aim of deriving selection functions for all Gaia data products.

Selected papers

First Author:

Andrew Everall, Douglas Boubert , Sergey E. Koposov, Leigh Smith and Berry Holl. Completeness of the Gaia-verse V: The Astrometry Spread Function of Gaia DR2. MNRAS Accepted, January 2021 ads

Andrew Everall; and Payel Das. seestar: Selection functions for spectroscopic surveys of the Milky Way. MNRAS, 493(2):2042–2058, April 2020 ads

A. Everall;, N. W. Evans, V. Belokurov, and R. Schönrich. The tilt of the local velocity ellipsoid as seen by Gaia. MNRAS, 489(1):910–918, Oct 2019 ads

Second Author:

Douglas Boubert, Andrew Everall, Jack Fraser, Amery Gration and Berry Holl. Completeness of the Gaia-verse III: using hidden states to infer gaps, detection efficiencies and the scanning law from the DR2 light curves. Accepted for pubication in MNRAS, November 2020 ads

Douglas Boubert and Andrew Everall. Completeness of the Gaia-verse II: what are the odds that a star is missing from Gaia DR2? MNRAS, August 2020 ads

Douglas Boubert, Andrew Everall;, and Berry Holl. Completeness of the Gaia-verse - I. When and where were Gaia’s eyes on the sky during DR2? MNRAS, 497(2):1826–1841, July 2020 ads

Peter McGill, Andrew Everall;, Douglas Boubert, and Leigh C. Smith. Predictions of Gaia’s prize microlensing events are flawed. MNRAS, 498(1):L6–L10, June 2020 ads


Vasily Belokurov, Zephyr Penoyre, Semyeong Oh, Giuliano Iorio, Simon Hodgkin, N. Wyn Evans, Andrew Everall;, Sergey E. Koposov, Christopher A. Tout, Robert Izzard, Cathie J. Clarke and Anthony G. A. Brown. Unresolved stellar companions with Gaia DR2 astrometry. MNRAS, 496(2):1922–1940, June 2020 ads

Zephyr Penoyre, Vasily Belokurov, N. Wyn Evans, A. Everall, and S. E. Koposov. Binary deviations from single object astrometry. MNRAS, 495(1):321–337, May 2020 ads


Oct 2018 - present: PhD Student, Institute of Astronomy, Cambridge.

Oct 2017 - Apr 2018: Research assistant, Rudolph Peierls Centre for Theoretical Physics, Oxford

Page last updated: 13 January 2021 at 18:11