Chihway Chang

KICP Fellow

Ph.D., Stanford University, 2013
Contact Information
Location: ERC 427
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.

Selected publications
1) D. Kirk, Y. Omori, A. Benoit-Levy, R. Cawton, C. Chang et al., Cross-correlation of gravitational lensing from DES Science Verification, SPT and Planck . MNRAS 459 , 21 (2016), 1512.04535 .
2) A. Pujol, C. Chang , E. Gazganaga, A. Amara, A. Refregier et al., A new method to measure galaxy bias from the density and weak lensing fields . Accepted to MNRAS. ArXiv e-prints (2016) 1601.00160 .
3) C. Chang , A. Pujol, E. Gazganaga, A. Amara, A. Refregier et al., Galaxy bias from the DES Science Verification Data: combining galaxy density maps and weak lensing maps . MNRAS 459 , 3203 (2016), 1601.00405 .

Ongoing Scientific Projects:
Currently in Committees
  • Friday Seminar committee

KICP Publications
2017 | 2016

Latest Journal Publications
  1. "A Comparison of Cosmological Parameters Determined from CMB Temperature Power Spectra from the South Pole Telescope and the Planck Satellite", arXiv:1706.10286 (Jun 2017)
  2. "Dark Energy Survey Year 1 Results: Multi-Probe Methodology and Simulated Likelihood Analyses", arXiv:1706.09359 (Jun 2017)
  3. "The Halo Boundary of Galaxy Clusters in the SDSS", The Astrophysical Journal, Volume 841, Issue 1, article id. 18, 17 pp. (2017) (May 2017)
  4. "A 2500 square-degree CMB lensing map from combined South Pole Telescope and Planck data", arXiv:1705.00743 (May 2017)
  5. "Testing the lognormality of the galaxy and weak lensing convergence distributions from Dark Energy Survey maps", Monthly Notices of the Royal Astronomical Society, Volume 466, Issue 2, p.1444-1461 (Apr 2017)
  6. "A Comparison of Maps and Power Spectra Determined from South Pole Telescope and Planck Data", arXiv:1704.00884 (Apr 2017)
  7. "VizieR Online Data Catalog: SPT-SZ survey galaxy clusters optical spectroscopy (Ruel+, 2014)", VizieR On-line Data Catalog: J/ApJ/792/45. Originally published in: 2014ApJ...792...45R (Apr 2017)
  8. "Inference from the small scales of cosmic shear with current and future Dark Energy Survey data", Monthly Notices of the Royal Astronomical Society, Volume 465, Issue 3, p.2567-2583 (Mar 2017)
  9. "CMB Polarization B-mode Delensing with SPTpol and Herschel", arXiv:1701.04396 (Jan 2017)
  10. "Maps of the Magellanic Clouds from Combined South Pole Telescope and PLANCK Data", The Astrophysical Journal Supplement Series, Volume 227, Issue 2, article id. 23, 20 pp. (2016) (Dec 2016)
  11. "VizieR Online Data Catalog: Full spectroscopic data release of the SPT-GMOS (Bayliss+, 2016)", VizieR On-line Data Catalog: J/ApJS/227/3. Originally published in: 2016ApJS..227....3B (Nov 2016)
  12. "Cosmological Constraints from Galaxy Clusters in the 2500 Square-degree SPT-SZ Survey", The Astrophysical Journal, Volume 832, Issue 1, article id. 95, 17 pp. (2016) (Nov 2016)
  13. "Mapping and Simulating Systematics due to Spatially Varying Observing Conditions in DES Science Verification Data", The Astrophysical Journal Supplement Series, Volume 226, Issue 2, article id. 24, 13 pp. (2016) (Oct 2016)