The Computational Modeling of Galaxies
How do galaxies and many of their properties evolve over cosmic history? Which processes determine their sizes, regulate their star formation rates, or shape their morphology? Nobody really knows for sure. What makes this research so challenging is the large range of scales (from the cosmic web to individual molecular clouds) and the complexity of the physical processes operating in the interstellar and circumgalactic medium. However, compared with just 10 years ago, we are now much closer to answering those questions. The continuous increase in computing power enables astrophysicists to develop and evaluate increasingly sophisticated computational models of galaxy evolution, mitigating the dynamic range problem. These model building efforts were greatly helped by the advent of large, digital galaxy surveys that resulted in the quantitative analysis of millions of galaxies -- a development that is still revolutionizing our understanding of galaxy evolution.
I am a computation-oriented astrophysicist with research interests in the formation and evolution of galaxies, in structure formation, and in the physical processes that take place in the interstellar medium. A significant part of my research relies on state-of-the-art hydrodynamics and gravity simulations.
Selected Recent Publications
Are star formation rates of galaxies bimodal?
Feldmann, Robert 2017, MNRAS 470, L59
A stellar feedback origin for neutral hydrogen in high-redshift quasar-mass haloes
Faucher-Giguère, Claude-André; Feldmann, Robert; Quataert, Eliot; Kereš, Dušan; Hopkins, Philip F.; Murray, Norman 2016, MNRAS 461, L32
The formation of massive, quiescent galaxies at cosmic noon
Feldmann, Robert; Hopkins, Philip F.; Quataert, Eliot; Faucher-Giguère, Claude-André; Kereš, Dušan 2016, MNRAS 458, L14
The formation of submillimetre-bright galaxies from gas infall over a billion years
Narayanan, Desika; Turk, Matthew; Feldmann, Robert; Robitaille, Thomas; Hopkins, Philip; Thompson, Robert; Hayward, Christopher; Ball, David; Faucher-Giguère, Claude-André; Kereš, Dušan 2015, Nature 525, 496