Yan Gong

Positions: Professor
Academic Title: Professor
Mailing Address: Yan Gong
Education and Career History

2001-2005, BS, University of Jinan, China
2005-2010, PhD, National Astronomical Observatories, CAS (NAOC), China
2010-2015, Postdoctoral Fellow, University of California, Irvine (UCI), USA
2015-present, Professor, NAOC, China

Research Fields

Dark matter and dark energy models, intensity mappings of atomic, molecular and 21cm emission lines, cosmic infrared background, cosmic large-scale structure, model constraint with observational data


In 2011, we first proposed to use molecular and fine structure lines to probe the epoch of reionization, and several planned and on-going projects are based on this work.
In 2012, we developed an intrahalo light model for galaxies, which can naturally explain the puzzle of the excess of near-IR background anisotropies.
In 2017, we suggested to observe the polarization of 3.5 keV emission line, which can test the axion-conversion hypothesis, and provide an effective way to verify the existence of axion particle (as a dark matter candidate).

Selected Publication

Testing the axion-conversion hypothesis of 3.5 keV emission with polarization, Yan Gong, Xuelei Chen and Hua Feng, Phys. Rev. Lett. 118, 061101 (2017)
Intensity mapping of H-alpha, H-beta, [OII] and [OIII] lines at z<5, Yan Gong et al., ApJ, 835, 273 (2017)
Axion decay and anisotropy of near-IR extragalactic background light, Yan Gong, Asantha Cooray et al., ApJ, 825, 104 (2015).
Ultraviolet luminosity density of the universe during the epoch of reionization, Ketron Mitchell-Wynne, Asantha Cooray, Yan Gong et al., Nature Communications, 6, 7945 (2015).
On the origin of near-infrared extragalactic background light anisotropy, Michael Zemcov, Joseph Smidt, Toshiaki Arai, James Bock, Asantha Cooray, Yan Gong et al., Science, 346, 732-735 (2014).
Foreground contamination in Ly-alpha intensity mapping during the epoch of reionization, Yan Gong et al., ApJ, 785, 72 (2014).
The extragalactic background light from the measurements of the attenuation of high-energy gamma-ray spectrum, Yan Gong & Asantha Cooray, ApJL, 772, L12 (2013) .
Probing the Pre-Reionization Epoch with Molecular Hydrogen Intensity Mapping, Yan Gong, Asantha Cooray & Mario Santos, ApJ, 768, 130 (2013).
Near-infrared background anisotropies from diffuse intrahalo light of galaxies”,   A. Cooray, J. Smidt, F. De Bernardis, Yan Gong et al., Nature, 494, 514 (2012).
The Near-IR Background Intensity and Anisotropies During The Epoch of Reionization, Asantha Cooray, Yan Gong (corresponding author) et al., ApJ, 756, 92 (2012).
Intensity Mapping of the [CII] Fine Structure Line during the Epoch of Reionization, Yan Gong et al., ApJ, 745, 49 (2012).
Probing Reionization with Intensity Mapping of Molecular and Fine Structure Lines, Yan Gong et al., ApJL, 728, L46 (2011).
Cosmology with Photometric Surveys of Type Ia Supernovae, Yan Gong, Asantha Cooray & Xuelei Chen, ApJ, 709, 1420-1428 (2010).
Cosmological Constraints on Invisible Decay of Dark Matter, Yan Gong & Xuelei Chen, Phys.Rev.D, 77, 103511 (2008).