Chihway Chang

KICP Fellow

Ph.D., Stanford University, 2013
Contact Information
Location: ERC 427
WWW: Web Site
I work on weak gravitational lensing data in the Dark Energy Survey and different techniques in combining these measurements with other data sets such as the galaxy position and CMB lensing. I like to explore the weak lensing data in non-conventional ways to learn about cosmology as well as galaxy evolution. With a background in (LSST and DES) image simulations, I rely on various kinds of simulations in my work. On the side, I am interested in the prospects of HI intensity mapping in the future large radio projects.

Ongoing Scientific Projects:
Currently in Committees
  • Friday Seminar committee

KICP Publications
2018 | 2017 | 2016

Latest Journal Publications
  1. "Dark Energy Survey Year 1 results: curved-sky weak lensing mass map", Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 3, p.3165-3190 (Apr 2018)
  2. "Dark Energy Survey Year 1 Results: Methodology and Projections for Joint Analysis of Galaxy Clustering, Galaxy Lensing, and CMB Lensing Two-point Functions", arXiv:1802.05257 (Feb 2018)
  3. "A Comparison of Maps and Power Spectra Determined from South Pole Telescope and Planck Data", The Astrophysical Journal, Volume 853, Issue 1, article id. 3, 14 pp. (2018) (Jan 2018)
  4. "Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data", The Astrophysical Journal, Volume 852, Issue 2, article id. 97, 31 pp. (2018) (Jan 2018)
  5. "Improving Weak Lensing Mass Map Reconstructions using Gaussian and Sparsity Priors: Application to DES SV", arXiv:1801.08945 (Jan 2018)
  6. "The Dark Energy Survey Data Release 1", arXiv:1801.03181 (Jan 2018)
  7. "Constraints on Cosmological Parameters from the Angular Power Spectrum of a Combined 2500 deg$^2$ SPT-SZ and Planck Gravitational Lensing Map", arXiv:1712.07541 (Dec 2017)
  8. "Dark Energy Survey Year 1 Results: Calibration of redMaGiC Redshift Distributions in DES and SDSS from Cross-Correlations", arXiv:1712.07298 (Dec 2017)
  9. "A Comparison of Cosmological Parameters Determined from CMB Temperature Power Spectra from the South Pole Telescope and the Planck Satellite", The Astrophysical Journal, Volume 850, Issue 1, article id. 101, 14 pp. (2017) (Nov 2017)
  10. "A 2500 deg2 CMB Lensing Map from Combined South Pole Telescope and Planck Data", The Astrophysical Journal, Volume 849, Issue 2, article id. 124, 16 pp. (2017) (Nov 2017)
  11. "Dark Energy Survey Year 1 Results: A Precise H0 Measurement from DES Y1, BAO, and D/H Data", arXiv:1711.00403 (Nov 2017)
  12. "Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS", arXiv:1710.05045 (Oct 2017)
  13. "Density split statistics: joint model of counts and lensing in cells", arXiv:1710.05162 (Oct 2017)
  14. "Dark Energy Survey Year 1 Results: Cross-Correlation Redshifts in the DES -- Calibration of the Weak Lensing Source Redshift Distributions", arXiv:1710.02517 (Oct 2017)
  15. "The Splashback Feature around DES Galaxy Clusters: Galaxy Density and Weak Lensing Profiles", arXiv:1710.06808 (Oct 2017)
  16. "CMB Polarization B-mode Delensing with SPTpol and Herschel", The Astrophysical Journal, Volume 846, Issue 1, article id. 45, 17 pp. (2017) (Sep 2017)
  17. "Dark Energy Survey Year 1 Results: Cross-Correlation Redshifts - Methods and Systematics Characterization", arXiv:1709.00992 (Sep 2017)
  18. "A Measurement of CMB Cluster Lensing with SPT and DES Year 1 Data", arXiv:1708.01360 (Aug 2017)
  19. "Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear", arXiv:1708.01538 (Aug 2017)
  20. "Dark Energy Survey Year 1 Results: Galaxy-Galaxy Lensing", arXiv:1708.01537 (Aug 2017)

Past Visitors:
  1. Andrew Hearin, Argonne National Lab (2018)
  2. Daniel Jacobs, Arizona State University (2018)
  3. Yao-Yuan Mao, University of Pittsburgh (2018)
  4. Jessica Turner, Fermi National Accelerator Laboratory (2018)
  5. Ami Choi, The Ohio State University (2017)
  6. Stephen Feeney, Flatiron Institute (2017)
  7. Francois Lanusse, Carnegie Mellon University (2017)