December 27, 2021
Welcome to Xiangcheng Ma's Page
Since August 2021, I am the Steward Observatory Prize Fellow in theoretical and computational astrophysics at Steward Observatory, University of Arizona. Between August 2018 and August 2021, I was a Theoretical Astrophysics Center (TAC) postdoctoral fellow in the Department of Astronomy at UC Berkeley, working primarily with Prof. Eliot Quataert. I received my Ph.D. in theoretical astrophysics from Caltech in June 2018, advised by Prof. Phil Hopkins.
I have been an active member of the Feedback in Realistic Environments (FIRE) collaboration. I carry out massive hydrodynamic simulations and Monte Carlo radiative transfer calculations on big supercomputers to study a broad range of topics in galaxy formation, the interstellar medium, star formation, feedback, and supermassive black holes. I have the fortune to work closely with many great people, both theorists and observers, inside and outside the FIRE team.
Click here to see more details about my research.
Curriculum vitae with bibliography (pdf)
See the ADS library here for a list of my publications.
I was born and raised in Tianjin, a major city in China next to its capital, Beijing, and known as the capital of humor. I was an undergraduate student in astronomy from August 2009 to June 2013 at the University of Science and Technology of China (USTC, in Hefei, Anhui province) before coming to Caltech for graduate study.
Galactic chemical evolution
I have carried out a series of studies on galactic chemical evolution using the FIRE cosmological simulations.
Galaxy formation in the reionization era
I develop a suite of high-resolution cosmological zoom-in simulations of galaxies at the reionization epoch, taking advantage of the realistic FIRE models.
Bursty star formation and disk settling
Collaborators and I show that dwarf and high-z galaxies exhibit "bursty" star formation. We explore when and why rotationally supported gas disks form.
Lyman-continuum & Lyman-alpha escape fractions
I study the escape fraction of Lyman-continuum and Lyman-alpha photons from high-redshift galaxies, and their contribution to cosmic reionization.
Resolving gobular cluster formation in simulations
I run the first cosmological simulations that explicitly resolve the formation of proto-globular clusters.
Supermassive black hole growth at high redshift
Collaborators and I argue that supermassive black holes (SMBHs) cannot grow efficiently at early times when the galaxies are bursty. I show this is because galactic nuclei grow stellar mass by merging massive star clusters rather than in situ star formation.