My research focuses on theoretical and observational cosmology via weak gravitational lensing and large-scale structure. 

My primary research focus is on constraining cosmological models and the impact of observational systematics using combinations of galaxy weak lensing and large-scale clustering measurements. This work is primarily focused on Dark Energy Survey data, but I am also involved in the LSST DESC and WFIRST Cosmology in the High-Latitude Survey SIT.

I've also worked extensively on modeling and mitigating the impact of the intrinsic alignment of galaxies on these probes and on observational systematics like, for example, the PSF in shape measurement. My PhD dissertation also focused partly on studying weak lensing and galaxy clustering in exact, inhomogeneous and anisotropic metrics in general relativity.

Selected Publications

  • Samuroff S., Troxel M.A., Bridle S., Zuntz J., MacCrann N., Kause E., Eifler T. & Kirk D., Simultaneous Constraints on Cosmology and Photometric Redshift Bias from Weak Lensing and Galaxy Clustering, Monthly Notices of the Royal Astronomical Society Letters, 465, L20, 2016
  • Dark Energy Survey Collab. et al., Cosmology from Cosmic Shear with DES Science Verification Data, Physical Review D, 94, 022001, 2016
  • Becker M.R., Troxel M.A., et al., Cosmic Shear Measurements with DES Science Verification Data, Physical Review D, 94, 022002, 2016
  • Bonnett C., Troxel M.A., et al., Redshift distributions of galaxies in the DES Science Verification shear catalogue and implications for weak lensing, Physical Review D. 94, 042005, 2016
  • Chang C. et al., Wide-Field Lensing Mass Maps from DES Science Verification Data, Physical Review Letters, 115, 051301, 2015
  • Troxel M.A. & Ishak M., The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology, Physics Reports, 558, 1, 2015
  • Troxel M.A., Dissertation: Gravitational lensing in standard and non-standard frameworks as a probe for precision cosmology: Challenges and applications, The University of Texas at Dallas, 2014
  • Troxel M.A. & Ishak M., Cross-correlation between cosmic microwave background lensing and galaxy intrinsic alignment as a contaminant to gravitational lensing cross- correlated probes of the Universe, Physical Review D, 89, 063528, 2014
  • Ishak M., Peel A., & Troxel M.A. Stringent restriction from the growth of large- scale structure on apparent acceleration in inhomogeneous cosmological models, Physical Review Letters, 111, 251302, 2013
  • Branch D., Dang L.C., Hall N., Ketchum W., Melakayil M., Parrent J., Troxel M.A., Casebeer D., Jeffery D.J. & Baron E., Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light, Publications of the Astronomical Society of the Pacific, 119, 135, 2006

Selected invited talks

  • Seminar: Cosmology from Weak Lensing in the Dark Energy Survey (DES), Carnegie Mellon University, Pittsburgh PA, November 2016
  • Seminar: Cosmology from Weak Lensing in the Dark Energy Survey (DES), Jet Propulsion Laboratory, Pasadena, CA, September 2016
  • Seminar: Weak Gravitational Lensing in the Dark Energy Survey (DES), Stanford University, Palo Alto CA, May 2016
  • Commencement address: Building a career and community with integrity and quality, Missouri Academy, Northwest Missouri State University, Maryville MO, May 2016
  • Talk: Dark Energy Survey: A Weak Lensing Overview, American Physical Society Meeting, Salt Lake City UT, April 2016
  • Seminar: Disentangling fundamental physics from subtle systematics, Fermilab, Batavia IL, January 2016
  • Seminar: Disentangling fundamental physics from subtle systematics, IEEC-CSIC, Barcelona, December 2015
  • Seminar: Disentangling fundamental physics from subtle systematics, CCAPP, OSU, Columbus OH, November 2015
  • Seminar: Cosmological interpretation of LSS in exact, inhomogeneous models in GR, University of Manchester, UK, November 2014
  • Dissertation talk: 223rd AAS Meeting, National Habor, MD, January 2014
  • Talk: Lensing in exact, inhomogeneous solutions in GR, 27th Texas Symposium on Relativistic Astrophysics, Dallas, TX, December 2013
  • Seminar: Mitigation and measurement of three-point intrinsic alignment correlations, Jet Propulsion Laboratory, Pasadena, CA, November 2013
  • Talk: Analytical descriptions of three-point self-calibration techniques, ITC - CfA, Harvard University, Cambridge, MA, November 2013
  • Prize talk: Robert S. Hyer award invited talk, American Physical Society (TX Sec.) Meeting, University of Texas at Brownsville, Brownsville, TX, October 2013
  • Colloquium: The promise of weak lensing cosmology in the face of limiting systematics, Southern Methodist University, Dallas, TX, March 2013

Full Publication List

  1. Melchior P. et al, Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data, arxiv:astro-ph/1610.06890, 2016
  2. Samuroff S., Troxel M.A., Bridle S., Zuntz J., MacCrann N., Kause E., Eifler T. & Kirk D., Simultaneous Constraints on Cosmology and Photometric Redshift Bias from Weak Lensing and Galaxy Clustering, Monthly Notices of the Royal Astronomical Society Letters, 465, L20, 2016
  3. Kwan J. et al., Cosmology from large scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data, Monthly Notices of the Royal Astronomical Society, 464, 4045, 2016
  4. Clampitt J. et al., Galaxy-Galaxy Lensing in the DES Science Verification Data, Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 465, 4204, 2016
  5. Kacprzak T et al., Cosmology constraints from shear peak statistics in Dark Energy Survey Science Verification data, Monthly Notices of the Royal Astronomical Society, 463, 3653, 2016
  6. Baxter E.J. et al., Joint Measurement of Lensing-Galaxy Correlations Using SPT and DES SV Data, Monthly Notices of the Royal Astronomical Society, 461, 4099, 2016
  7. Chang C. et al., Galaxy bias from the DES Science Verification Data: combining galaxy density maps and weak lensing maps, Monthly Notices of the Royal Astronomical Society, 459, 3203, 2016
  8. Kirk D. et al., Cross-correlation of gravitational lensing from DES Science Verification data with SPT and Planck lensing, Monthly Notices of the Royal Astronomical Society, 459, 21, 2015
  9. Dark Energy Survey Collab. et al., Cosmology from Cosmic Shear with DES Science Verification Data, Physical Review D, 94, 022001, 2016
  10. Becker M.R., Troxel M.A., et al., Cosmic Shear Measurements with DES Science Verification Data, Physical Review D, 94, 022002, 2016
  11. Bonnett C., Troxel M.A., et al., Redshift distributions of galaxies in the DES Science Verification shear catalogue and implications for weak lensing, Physical Review D. 94, 042005, 2016
  12. Jarvis M. et al., The DES Science Verification Weak Lensing Shear Catalogs, Monthly Notices of the Royal Astronomical Society, 460, 2245, 2015
  13. Gruen D. et al., Weak lensing by galaxy troughs in DES Science Verification data, Monthly Notices of the Royal Astronomical Society, 455, 3367, 2015
  14. Chang C. et al., Wide-Field Lensing Mass Maps from DES Science Verification Data, Physical Review Letters, 115, 051301, 2015
  15. Vikram V. et al., Wide-Field Lensing Mass Maps from DES Science Verification Data: Methodology and Detailed Analysis, Physical Review D, 92, 022006, 2015
  16. Troxel M.A. & Ishak M., The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology, Physics Reports, 558, 1, 2015
  17. Peel A., Troxel M.A. & Ishak M., Effect of inhomogeneities on high precision measurements of cosmological distances, Physical Review D, 90, 123536, 2015
  18. Troxel M.A., Dissertation: Gravitational lensing in standard and non-standard frameworks as a probe for precision cosmology: Challenges and applications, The University of Texas at Dallas, 2014
  19. Troxel M.A. & Ishak M., Cross-correlation between cosmic microwave background lensing and galaxy intrinsic alignment as a contaminant to gravitational lensing cross- correlated probes of the Universe, Physical Review D, 89, 063528, 2014
  20. Troxel M.A., Ishak M. & Peel A., The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology, Journal of Cosmology and Astroparticle Physics, 03, 040, 2014
  21. Troxel M.A., Peel A. & Ishak M., Effects of anisotropy on gravitational infall in galaxy clusters using an exact general relativistic model, Journal of Cosmology and Astroparticle Physics, 12, 048, 2013
  22. Ishak M., Peel A., & Troxel M.A. Stringent restriction from the growth of large- scale structure on apparent acceleration in inhomogeneous cosmological models, Physical Review Letters, 111, 251302, 2013
  23. Peel A., Ishak M. & Troxel M.A. Large-Scale Growth Evolution in the Szekeres Inhomogeneous Cosmological Models with Comparison to Growth Data, Physical Review D, 86, 123508, 2012
  24. Troxel M.A. & Ishak M., Self-Calibrating the Gravitational Shear-Intrinsic Ellipticity- Intrinsic Ellipticity (GII) Cross-Correlation, Monthly Notices of the Royal Astronomical Society, 427, 441, 2012
  25. Troxel M.A. & Ishak M., Self-Calibration for 3-point Intrinsic Alignment Auto- Correlations in Weak Lensing Surveys, Monthly Notices of the Royal Astronomical Society, 423, 1663, 2012
  26. Troxel M.A. & Ishak M., Self-Calibration Technique for 3-point Intrinsic Alignment Correlations in Weak Lensing Surveys, Monthly Notices of the Royal Astronomical Society, 419, 1804, 2012
  27. Branch D., Jeffery D.J., Parrent J., Baron E., Troxel M.A., Stanishev V., Keithley M., Harrison J. & Bruner C., Comparative Direct Analysis of Type Ia Supernova Spectra. IV. Postmaximum, Publications of the Astronomical Society of the Pacific, 120, 135, 2008
  28. Branch D., Troxel M.A., Jeffery D.J., Hatano K., Musco M., Parrent J., Baron E., Dang L.C., Casebeer D., Hall N. & Ketchum W., Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum, Publications of the Astronomical Society of the Pacific, 119, 709, 2007
  29. Parrent J., Branch D., Troxel M.A., Casebeer D., Jeffery D.J., Ketchum W., Baron E., Serduke F.J.D. & Filippenko A.V., Direct Analysis of Spectra of the Unusual Type Ib Supernova 2005bf, Publications of the Astronomical Society of the Pacific, 119, 135, 2007
  30. Branch D., Dang L.C., Hall N., Ketchum W., Melakayil M., Parrent J., Troxel M.A., Casebeer D., Jeffery D.J. & Baron E., Comparative Direct Analysis of Type Ia Supernova Spectra. II. Maximum Light, Publications of the Astronomical Society of the Pacific, 119, 135, 2006