Hume Feldman

Hume A. Feldman is a physicist specializing in cosmology and astrophysics. He is an APS Fellow and a professor and chair of the Department of Physics and Astronomy at the University of Kansas.

Feldman graduated from the University of California at Santa Cruz in 1983. He got his PhD at Stony Brook University in NY, 1989 working with Robert Brandenberger. He was then a postdoc at the Canadian Institute for Theoretical Astrophysics, Toronto, 1989–91, a research fellow at the University of Michigan 1991-94 and a Prof. Research in the Physics Department at Princeton University 1994-96.

Hume has been a researcher in the study of the large-scale peculiar velocity field for the past two decades. His explanation of the systematic errors, aliasing and incomplete cancellations of small-scale noise masquerading as large-scale signal lead to the reemergence of peculiar velocities as a premier tool in our arsenal to probe the dynamics and statistics of the large-scale-structure of the Universe. He developed a formalism to optimize the determination of cosmic flows from proper distance surveys and enabled for the first time direct comparison of independent surveys and cosmological models as a function of scale, thus establishing the cosmological significance of flow probes.

His work has led to many widely cited results (such as a nearly 3-sigma flows on 100 Mpc/h scales), renewed discussion of imposing flow constraints on cosmological models and the redesign of proper distance surveys. He is the coauthor of two recent papers that brought back this field from a decade with no new data (with over 200 and 100 citations in the last five and four years, respectively). Hume was a coauthor of the best-cited article on cosmological perturbations (>3000 citations) developing a gauge invariant formalism that is widely considered to be the gold standard in this sub- discipline. His seminal work on the approximation of the matter power spectrum from redshift surveys (>650 citations) has opened the door to a whole industry of cosmological probes and N-point functions determination in Fourier space. He was a coauthor on the "Loitering Universe" series of papers that predicted an accelerating universe as a solution to the age problem in 1992 and which included a scalar field that acted like an effective cosmological constant or a quintessence field years before the supernovae type IA results.

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