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Hi, I am He Jia.

He Jia (贾赫)

5th Year Graduate Student at Princeton Astrophysics.

Hello! My name is He Jia (贾赫, pronounced as /hɜ: dʒɑ:/ in Chinese, which roughly means famous businessman 😅). Born in Jingmen, Hubei in 1998, I moved to Shenzhen, Guangdong in 2008 with my family, until I went to Beijing for college in 2016 and then Princeton, New Jersey for graduate school in 2020 (physically in 2021 though, due to the pandamic). I am currently on the astrophysics postdoc job market.

I am broadly interested in using advanced statistical techniques to optimally extract information from astrophysical data, with the goal of driving new discoveries. While I was initially trained as a cosmologist, a field I continue to actively contribute to, my research has expanded to include black holes since graduate school. My focus on these two areas stems from the vast amounts of increasingly precise data being generated by ongoing and upcoming projects, where sophisticated statistical and machine learning models are crucial for unlocking the deeper insights that would otherwise remain inaccessible. Beyond cosmology and black holes, I am also open to exploring new science areas depending on where the most exciting science opportunities are.

Education

Ph.D. in Astrophysics | Advisors: Prof. Eliot Quataert & Prof. David Spergel
Visiting Undergraduate Researcher | Advisor: Prof. Uroš Seljak
B.S. in Physics | Advisor: Prof. Zuhui Fan (范祖辉)
High School Certificate

Publications

Black Hole Spin Measurement with the Shape of the Photon Ring

He Jia et al.

Photon Ring Diameter Measurement with Incoherently Averaged Visibility Data

He Jia et al.

Cosmological Analysis with Calibrated Neural Quantile Estimation and Approximate Simulators

He Jia

The Black Hole Explorer: Motivation and Vision

Michael Johnson et al. (including He Jia)

Photon Ring Interferometric Signatures Beyond The Universal Regime

He Jia, Eliot Quataert, Alexandru Lupsasca and George N. Wong

Simulation-Based Inference with Quantile Regression

He Jia

Millimeter Observational Signatures of Flares in Magnetically Arrested Black Hole Accretion Models

He Jia, Bart Ripperda, Eliot Quataert, Christopher J. White, Koushik Chatterjee, Alexander Philippov and Matthew Liska

Galaxy Spin Classification. I. Z-wise versus S-wise Spirals with the Chirality Equivariant Residual Network

He Jia, Hong-Ming Zhu and Ue-Li Pen

Observational Signatures of Black Hole Accretion: Rotating Versus Spherical Flows with Tilted Magnetic Fields

He Jia, Christopher J. White, Eliot Quataert and Sean M. Ressler

Normalizing Constant Estimation with Gaussianized Bridge Sampling

He Jia and Uroš Seljak