Showing 1 - 20 results of 22 for search '"galaxy clusters"', query time: 0.07s Refine Results
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    Evidence for AGN Feedback in Galaxy Clusters and Groups by Myriam Gitti, Fabrizio Brighenti, Brian R. McNamara

    Published 2012-01-01
    “…The current generation of flagship X-ray missions, Chandra and XMM-Newton, has changed our understanding of the so-called “cool-core” galaxy clusters and groups. Instead of the initial idea that the thermal gas is cooling and flowing toward the center, the new picture envisages a complex dynamical evolution of the intracluster medium (ICM) regulated by the radiative cooling and the nongravitational heating from the active galactic nucleus (AGN). …”
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    Early Enrichment Population Theory at High Redshift by Anne E. Blackwell, Joel N. Bregman

    Published 2025-01-01
    Subjects: “…Galaxy clusters…”
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    The Theory of Resonant Cosmic Ray–driven Instabilities—Growth and Saturation of Single Modes by Rouven Lemmerz, Mohamad Shalaby, Christoph Pfrommer, Timon Thomas

    Published 2025-01-01
    “…We show that these kinetic simulations support our theoretical considerations, thus potentially foreshadowing a revision of the theory of CR transport in galaxies and galaxy clusters.…”
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    Non-Gaussianity from Large-Scale Structure Surveys by Licia Verde

    Published 2010-01-01
    “…With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large cluster samples over a large fraction of the extra-galactic sky (Planck, SPT, ACT, CMBPol, B-Pol), it is timely to investigate what constraints these surveys can impose on primordial non-Gaussianity. …”
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    Dwarf Galaxies in Voids: Dark Matter Halos and Gas Cooling by Matthias Hoeft, Stefan Gottlöber

    Published 2010-01-01
    “…Galaxy surveys have shown that luminous galaxies are mainly distributed in large filaments and galaxy clusters. The remaining large volumes are virtually devoid of luminous galaxies. …”
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    H i Intensity Mapping Cross-correlation with Thermal Sunyaev–Zel’dovich Fluctuations: Forecasted Cosmological Parameter Estimation for FAST and Planck by Ayodeji Ibitoye, Furen Deng, Yichao Li, Yin-Zhe Ma, Yan Gong, Xuelei Chen

    Published 2025-01-01
    “…In this paper, we forecast for the cross-correlation between the thermal Sunyaev–Zel’dovich (SZ) fluctuations as probed by the Planck satellite and fluctuations in the H i brightness temperature as probed by the ground-based Five-hundred-meter Aperture Spherical Telescope to trace the connection between galaxy clusters and the H i LSS. Assuming that the measurement is limited by instrumental noise rather than by foreground, we estimate the potential detectability of the cross-correlation signal and the improvement in the measurement of the H i cosmic density, the hydrostatic mass bias parameter, and the universal pressure profile parameters. …”
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    Improving H2RG Performance in SPHEREx Brassboard Model by Chi H. Nguyen, Phillip Korngut, C. Darren Dowell, James Bock, Jill Burnham, Samuel Condon, Walter Cook, Grigory Heaton, Howard Hui, Branislav Kecman, Hiromasa Miyasaka, Kenneth Manatt, Hien T. Nguyen, Stephen Padin, Marco Viero

    Published 2025-01-01
    “…We focus on the effectiveness of multiple reference samplings to reduce 1/ f noise most relevant to the galaxy formation analysis, in particular the noise on large angular scales k <0.13 [pix ^−1 ] (∼5″–20″) where the imprints of galaxy clustering will be measured. Our characterization confirms that increased sampling of reference pixels successfully reduces the 1/ f noise by ∼50% at these scales. …”
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