About

I am an astronomer at ASIAA in Taiwan. I do data‑intensive research focusing on cosmological galaxy formation, cosmic structures, and the matter-energy inventory of the Universe.

Astronomical observations are inherently projected views of the 3D Universe. To uncover the hidden, I develop novel tomographic techniques to separate components from our Milky Way and extragalactic large-scale structures near and far, traced by both individual objects and the diffuse radiation field in multiwavelength sky surveys. I also hunt for protoclusters of galaxies, the most extreme cosmic structures in the young Universe. I am part of NASA's SPHEREx mission that will survey the entire sky in about 100 spectral channels in the near-infrared.

Research Gallery


CSFD, the Corrected SFD Milky Way dust reddening map for the sky survey community
New paper on the cosmic thermal history probed by Sunyaev-Zeldovich effect tomography
Tomographer, a clustering redshift platform to explore a wide range of astronomy survey data
Extragalactic Background Light (EBL), the radiative energy output of the universe
Recovering redshift & spectral energy distributions of extragalactic background light
Dissecting Galactic dust maps using angular cross-correlations with cosmic web tracers
Visualizing the drastically evolving Lagrangian volumes of simulated galaxy protoclusters
Protoclusters are expected to be the key drivers of early cosmic star formation history and reionization
Three-stage scenario of galaxy cluster formation: inside-out, extended growth, and violent assembly
Discovery of a massive protocluster at z=2.44 in a blind Lya emitter search in the HETDEX Pilot Survey
Discovery of 36 protocluster candidates at z=2~3 using photometric redshifts in the COSMOS field
Mass and size evolution of protoclusters predicted in the Millennium simulation

Contact Information

Address:
R1414 Astronomy-Mathematics Building
No.1, Sec. 4, Roosevelt Rd
Taipei 10617, Taiwan, R.O.C.

Email:
ykchiang@asiaa.sinica.edu.tw