Zobrazeno 1 - 10
of 548
pro vyhledávání: '"Nagai, D."'
Radio relics are diffuse synchrotron sources in the outskirts of merging galaxy clusters energized by the merger shocks. In this paper, we present an overview of the radio relics in massive cluster mergers identified in the new TNG-Cluster simulation
Externí odkaz:
http://arxiv.org/abs/2311.06340
Autor:
Van Nest, Jordan D., Munshi, F., Wright, A. C., Tremmel, M., Brooks, A. M., Nagai, D., Quinn, T.
We explore populations of ultra-diffuse galaxies (UDGs) in isolated, satellite, and cluster environments using the Romulus25 and RomulusC simulations, including how the populations vary with UDG definition and viewing orientation. Using a fiducial de
Externí odkaz:
http://arxiv.org/abs/2108.12985
Autor:
Starikova, S., Vikhlinin, A., Kravtsov, A., Kraft, R., Connor, T., Mulchaey, J. S., Nagai, D.
We present the analysis of deep optical imaging of the galaxy cluster Abell 133 with the IMACS instrument on Magellan. Our multi-band photometry enables stellar mass measurements in the cluster member galaxies down to a mass limit of $M_\star=3\times
Externí odkaz:
http://arxiv.org/abs/2002.11074
Publikováno v:
In Astronomy and Computing October 2023 45
Autor:
Silich E.M., Bellomi E., Sayers J., ZuHone J., Chadayammuri U., Golwala S., Hughes D., Montaña A., Mroczkowski T., Nagai D., Sánchez D., Stanford S.A., Wilson G., Zemcov M., Zitrin A.
Publikováno v:
EPJ Web of Conferences, Vol 293, p 00050 (2024)
Galaxy cluster mergers are representative of a wide range of physics, making them an excellent probe of the properties of dark matter and the ionized plasma of the intracluster medium. To date, most studies have focused on mergers occurring in the pl
Externí odkaz:
https://doaj.org/article/a20998ecdd11487192336896f7746ab5
Autor:
Simionescu, A., Ettori, S., Werner, N., Nagai, D., Vazza, F., Akamatsu, H., Pinto, C., de Plaa, J., Wijers, N., Nelson, D., Pointecouteau, E., Pratt, G. W., Spiga, D., Vacanti, G., Lau, E., Rossetti, M., Gastaldello, F., Biffi, V., Bulbul, E., Collon, M. J., Herder, J. W. den, Eckert, D., Fraternali, F., Mingo, B., Pareschi, G., Pezzulli, G., Reiprich, T. H., Schaye, J., Walker, S. A., Werk, J.
The majority of the ordinary matter in the local Universe has been heated by strong structure formation shocks and resides in a largely unexplored hot, diffuse, X-ray emitting plasma that permeates the halos of galaxies, galaxy groups and clusters, a
Externí odkaz:
http://arxiv.org/abs/1908.01778
The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
Autor:
Pratt, G. W., Arnaud, M., Biviano, A., Eckert, D., Ettori, S., Nagai, D., Okabe, N., Reiprich, T. H.
Publikováno v:
Space Sci Rev (2019) 215:25
The total mass of a galaxy cluster is one of its most fundamental properties. Together with the redshift, the mass links observation and theory, allowing us to use the cluster population to test models of structure formation and to constrain cosmolog
Externí odkaz:
http://arxiv.org/abs/1902.10837
Autor:
Simionescu, A., ZuHone, J., Zhuravleva, I., Churazov, E., Gaspari, M., Nagai, D., Werner, N., Roediger, E., Canning, R. E. A., Eckert, D., Gu, L., Paerels, F.
The detailed velocity structure of the diffuse X-ray emitting intra-cluster medium (ICM) remains one of the last missing key ingredients in understanding the microphysical properties of these hot baryons and constraining our models of the growth and
Externí odkaz:
http://arxiv.org/abs/1902.00024
Autor:
Ntampaka, M., ZuHone, J., Eisenstein, D., Nagai, D., Vikhlinin, A., Hernquist, L., Marinacci, F., Nelson, D., Pakmor, R., Pillepich, A., Torrey, P., Vogelsberger, M.
We present a machine-learning approach for estimating galaxy cluster masses from Chandra mock images. We utilize a Convolutional Neural Network (CNN), a deep machine learning tool commonly used in image recognition tasks. The CNN is trained and teste
Externí odkaz:
http://arxiv.org/abs/1810.07703
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