Bingjie Wang / 王冰洁

PhD candidate // Astrophysics

  • Hi there,
    I am a graduate student at the Johns Hopkins University.
    My research focuses on cosmology and extragalactic astronomy.
    My CV can be viewed here.


    Johns Hopkins University, Baltimore, MD
    2016 -- 2021
    Ph.D., Astronomy & Astrophysics
    Advisor: Prof. Timothy M. Heckman

    University of Pittsburgh, Pittsburgh, PA
    2012 -- 2016
    Magna Cum Laude
    B.A., Philosophy
    B.Phil., Physics, offered by Honors College
    Advisor: Prof. Arthur B. Kosowsky


galaxy evolution / reionization / 21-cm cosmology / cosmic microwave background

In general terms, my research spans from galactic evolution to phenomenological models of the universe.

Currently, I work on two topics: the escape of ionizing radiation and galactic outflows.
The former concerns the processes in early galaxies that enable a substantial fraction of their Lyman-continuum radiation to escape the dense interstellar medium, which is crucial in understanding the epoch of reionization (slides from my AAS dissertation talk).
The latter is on the physical processes governing starburst-driven outflows, which are often invoked as the principal feedback mechanism in models of galaxy formation and evolution.

Previously, I have been involved in the Cosmology Large Angular Scale Surveyor (CLASS), whose primary goal is to detect and characterize the primordial B-mode polarization of the Cosmic Microwave Background -- a unique signature left by the primordial gravitational waves as posited in the theory of Inflation.

Before coming to Johns Hopkins, I worked on theoretical studies of large-angle anomalies -- phenomena revealed by measurements of the microwave background that are statistically unlikely to occur in ΛCDM.

Primary-author Publications

The Low-redshift Lyman-continuum Survey: [S II] deficiency and the leakage of ionizing radiation

Bingjie Wang, Timothy M. Heckman, and the survey collaboration, Astrophys. J. 916, 3 (2021).

(Featured in AAS Journal Author Series)

A systematic study of galactic outflows via fluorescence emission: implications for their size and structure

(Featured in AAS Nova)

Bingjie Wang, Timothy M. Heckman, Guangtun Zhu, Colin A. Norman, Astrophys. J. 894, 149 (2020).

A new technique for finding galaxies leaking Lyman-continuum radiation: [S II] deficiency

Bingjie Wang, Timothy M. Heckman, Claus Leitherer, et al., Astrophys. J. 885, 57 (2019).

A projected estimate of the reionization optical depth using the CLASS experiment's sample-variance limited E-mode measurement

Duncan J. Watts, Bingjie Wang, and the CLASS collaboration, Astrophys. J. 863, 121 (2018).

Microwave background correlations from dipole anisotropy modulation

Simone Aiola, Bingjie Wang, Arthur Kosowsky, et al., Phys. Rev. D 92 (6), 063008 (2015).

Gaussian approximation of peak values in the integrated Sachs-Wolfe effect

Simone Aiola, Arthur Kosowsky, and Bingjie Wang, Phys. Rev. D 91 (4), 043510 (2015).

"Two things fill me with wonder, the starry sky above me and the moral law within me."

-- Immaneul Kant

  • My life (or the lack of it) outside Physics

    I was born and raised in Shanghai, China, and then came to the United States for undergraduate study in 2012. Philosophy has been my passion ever since I read Sophie's World in middle school, and so I attended the University of Pittsburgh. How I decided to be a physicist... can be a story for another day.

    In essence, it is the same passion for the knowledge of nature that led me to the study of physics and philosophy -- we observe nature as a complexity, and through human ingenuity we disentangle the natural phenomena, and thus disenchant the world. In studying these two disciplines, I sense the power of mind: the ability to reach to the very beginning of the Universe, and to search for the answers to the oldest and deepest questions in the history of humanity.

    This is the journey which I would like to take on.

    P.S. If you are curious, I invite you to my occasionally updated blog, where I have posted some of my essays.