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http://hdl.handle.net/20.500.12386/31864
Title: | A high-resolution view of the filament of gas between Abell 399 and Abell 401 from the Atacama Cosmology Telescope and MUSTANG-2 | Authors: | Adam D. Hincks Federico Radiconi Charles Romero Mathew S. Madhavacheril Tony Mroczkowski Jason E. Austermann Eleonora Barbavara Nicholas Battaglia Elia Battistelli J. Richard Bond Erminia Calabrese Paolo de Bernardis Mark J. Devlin Simon R. Dicker Shannon M. Duff Adriaan J. Duivenvoorden Jo Dunkley Rolando Dünner Patricio A. Gallardo GOVONI, FEDERICA J. Colin Hill Matt Hilton Johannes Hubmayr John P. Hughes Luca Lamagna Martine Lokken Silvia Masi Brian S. Mason Jeff McMahon Kavilan Moodley MURGIA, MATTEO Sigurd Naess Lyman Page Francesco Piacentini Maria Salatino Craig L. Sarazin Alessandro Schillaci Jonathan L. Sievers Cristóbal Sifón Suzanne Staggs Joel N. Ullom VACCA, VALENTINA Alexander Van Engelen Michael R. Vissers Edward J. Wollack Zhilei Xu |
Issue Date: | 2022 | Journal: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Number: | 510 | Issue: | 3 | First Page: | 3335 | Abstract: | We report a significant detection of the hot intergalactic medium in the filamentary bridge connecting the galaxy clusters Abell 399 and Abell 401. This result is enabled by a low-noise, high-resolution map of the thermal Sunyaev-Zeldovich signal from the Atacama Cosmology Telescope (ACT) and Planck satellite. The ACT data provide the $1.65'$ resolution that allows us to clearly separate the profiles of the clusters, whose centres are separated by $37'$, from the gas associated with the filament. A model that fits for only the two clusters is ruled out compared to one that includes a bridge component at $>5\sigma$. Using a gas temperature determined from Suzaku X-ray data, we infer a total mass of $(3.3\pm0.7)\times10^{14}\,\mathrm{M}_{\odot}$ associated with the filament, comprising about $8\%$ of the entire Abell 399-Abell 401 system. We fit two phenomenological models to the filamentary structure; the favoured model has a width transverse to the axis joining the clusters of ${\sim}1.9\,\mathrm{Mpc}$. When combined with the Suzaku data, we find a gas density of $(0.88\pm0.24)\times10^{-4}\,\mathrm{cm}^{-3}$, considerably lower than previously reported. We show that this can be fully explained by a geometry in which the axis joining Abell 399 and Abell 401 has a large component along the line of sight, such that the distance between the clusters is significantly greater than the $3.2\,\mathrm{Mpc}$ projected separation on the plane of the sky. Finally, we present initial results from higher resolution ($12.7"$ effective) imaging of the bridge with the MUSTANG-2 receiver on the Green Bank Telescope. | URI: | http://hdl.handle.net/20.500.12386/31864 | URL: | http://arxiv.org/abs/2107.04611v2 https://academic.oup.com/mnras/article-abstract/510/3/3335/6442294?redirectedFrom=fulltext&login=true |
ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stab3391 | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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93_Hincks_et_al_2022.pdf | Pdf editoriale | 2.64 MB | Adobe PDF | View/Open |
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