Austin Peel

Austin_pic

I am a recent postdoc addition to the CosmoStat group at CEA Saclay. I am working with Jean-Luc Starck and other members of the team on weak lensing projects related to the Euclid mission.

Contact Information:
CEA Saclay, Service d'Astrophysique
Orme des Merisiers, Building 709
91191 Gif-sur-Yvette, France
email: austin [dot] peel [at] cea [dot] fr

Research

I have joined the CosmoStat team with the intention of applying and extending the sophisticated mathematical techniques developed in this lab (e.g., weak lensing mass mapping using sparsity-based methods) toward constraining cosmology. In particular, my work will be aimed at taking advantage of the future high-quality Euclid data to learn more about the dark sector of the Universe.

My PhD work lived more on the theoretical side of cosmology. In my thesis, I studied the growth of structures and light propagation in a certain class of general non-symmetric spacetimes called Szekeres models. The Szekeres metric is an inhomogeneous and anisotropic exact solution of Einstein's equations, which provides a good testing ground to explore nonlinear general relativistic effects in astrophysical and cosmological scenarios.

Education

I completed my PhD in cosmology at The University of Texas at Dallas in 2015 under the supervision of Mustapha Ishak-Boushaki.

Publications

  • Effect of inhomogeneities on high precision measurements of cosmological distances
    A. Peel, M. A. Troxel, and M. Ishak
    Phys. Rev. D 90, 123536 (2014)
  • The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology
    M. A. Troxel, M. Ishak, and A. Peel
    JCAP 03 (2014) 040
  • Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models
    M. Ishak, A. Peel, and M. A. Troxel
    Phys. Rev. Lett. 111, 251302 (2013)
  • Effects of anisotropy on gravitational infall in galaxy clusters using an exact general relativistic model
    M. A. Troxel, A. Peel, and M. Ishak
    JCAP 12 (2013) 048
  • Large-scale growth evolution in the Szekeres inhomogeneous cosmological models with comparison to growth data
    A. Peel, M. Ishak, and M. A. Troxel
    Phys. Rev. D 86, 123508 (2012)
  • Growth of structure in the Szekeres class-II inhomogeneous cosmological models and the matter-dominated era
    M. Ishak and A. Peel
    Phys. Rev. D 85, 083502 (2012)

Talks and Presentations

  • General meeting of the Texas Astronomical Society, invited guest speaker, Apr. 2015
  • 50th Anniversary of the Texas Symposium on Relativistic Astrophysics, contributed talk, Dec. 2013
  • Joint meeting of the Texas sections of APS, AAPT, and Zone 13 SPS, contributed talk, Oct. 2012
  • 219th meeting of the American Astronomical Society, poster presentation, Jan. 2012