Bingjie Wang / 王冰洁

PhD Student // Cosmology

  • Hi there,
    I am a graduate student at the Johns Hopkins University.
    My research focuses on theoretical cosmology and extragalactic astronomy.
    Prof. Timothy Heckman is my thesis advisor.
    My CV can be viewed here.


    Doctor of Philosophy
    2016 - current
    Astrophysics, Johns Hopkins University

    Master of Arts
    Physics, Johns Hopkins University

    Bachelor of Philosophy
    Magna Cum Laude
    Physics, University of Pittsburgh

    Bachelor of Arts
    Magna Cum Laude
    Philosophy, University of Pittsburgh


reionization / 21cm / cosmic microwave background

Broadly speaking, my interests lie in the physics of and beyond today's standard cosmological model.
My main research concerns the processes in early galaxies
that enable a substantial fraction of their ionizing radiation to escape the dense interstellar medium,
which is crucial in understanding the Epoch of Reionization.

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 the standard model.

Primary-author Publications

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

Bingjie Wang, Timothy M. Heckman, Claus Leitherer, et al., accepted for publication in ApJ (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, Tina Kahniashvili, and Hassan Firouzjahi, 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.