P
Paul Nulsen
Researcher at Smithsonian Institution
Publications - 412
Citations - 26767
Paul Nulsen is an academic researcher from Smithsonian Institution. The author has contributed to research in topics: Galaxy & Galaxy cluster. The author has an hindex of 84, co-authored 393 publications receiving 24854 citations. Previous affiliations of Paul Nulsen include University of California, Santa Cruz & Smithsonian Astrophysical Observatory.
Papers
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Journal ArticleDOI
Heating Hot Atmospheres with Active Galactic Nuclei
Brian R. McNamara,Paul Nulsen +1 more
TL;DR: In this paper, high-resolution X-ray spectroscopy of the hot gas in galaxy clusters has shown that the gas is not cooling to low temperatures at the predicted rates of hundreds to thousands of solar masses per year.
Journal ArticleDOI
A Systematic Study of Radio-induced X-Ray Cavities in Clusters, Groups, and Galaxies
TL;DR: In this paper, an analysis of 16 galaxy clusters, one group, and one galaxy drawn from the Chandra Data Archive is presented, where the authors evaluate the hypothesis that cooling in hot gas can be quenched by energy injected into the surrounding gas by the rising bubbles.
Journal ArticleDOI
Heating Hot Atmospheres with Active Galactic Nuclei
Brian R. McNamara,Paul Nulsen +1 more
TL;DR: In this paper, high-resolution X-ray spectroscopy of the hot gas in galaxy clusters has shown that the gas is not cooling to low temperatures at the predicted rates of hundreds to thousands of solar masses per year.
Journal ArticleDOI
Chandra X-Ray Observations of the Hydra A Cluster: An Interaction between the Radio Source and the X-Ray-emitting Gas
Brian R. McNamara,Michael W. Wise,Paul Nulsen,Paul Nulsen,L. P. David,Craig L. Sarazin,Mark W. Bautz,Maxim Markevitch,Alexey Vikhlinin,William R. Forman,C. Jones,D. E. Harris +11 more
TL;DR: In this paper, Chandra X-ray observations of the Hydra A cluster of galaxies are presented, and the discovery of structure in the central 80 kpc of the cluster's Xray-emitting gas.
Journal ArticleDOI
Mechanical feedback from active galactic nuclei in galaxies, groups and clusters
Brian R. McNamara,Paul Nulsen +1 more
TL;DR: In this article, the authors show that cooling x-ray atmospheres and the ensuing star formation and nuclear activity are probably coupled to a self-regulated feedback loop, and highlight the problems of atmospheric heating and transport processes.