Paul Nulsen
Smithsonian Institution
424 Papers
5.4K Citations
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. Previous affiliations of Paul Nulsen include University of California, Santa Cruz & Smithsonian Astrophysical Observatory.
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Papers
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.
1.3K
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.
1.2K
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.
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.
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The feedback-regulated growth of black holes and bulges through gas accretion and starbursts in cluster central dominant galaxies
TL;DR: In this article, the authors examined the relationship between cooling and star formation and found that the star formation rates are approaching or are comparable to X-ray and far-UV limits on the rates of gas condensation onto the central galaxy.
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