Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi

Hiroki Akamatsu, Fumie Akimoto, S. W. Allen, L. Angelini, M. Audard, Hisamitsu Awaki, M. Axelsson, Aya Bamba, M. Bautz, R. D. Blandford, Laura Brenneman, G. V. Brown, Esra Bülbül, Edward Cackett, M. Chernyakova, Meng P. Chiao, P. Coppi, Elisa Costantini, J. de Plaa, C. P. de Vries, Jan‐Willem den Herder, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew Fabian, C. Ferrigno, Adam Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Akihiro Furuzawa, M. Galeazzi, Luigi Gallo, Poshak Gandhi, M. Giustini, A. Goldwurm, Liyi Gu, M. Guainazzi, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, I. Harrus, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Natalie Hell, Junko S. Hiraga, A. E. Hornschemeier, Akio Hoshino, John P. Hughes, Yuto Ichinohe, Ryo Iizuka, Hajime Inoue, Yoshiyuki Inoue, M. Ishida, Kumi Ishikawa, Yoshitaka Ishisaki, Masachika Iwai, J. S. Kaastra, T. R. Kallman, T. Kamae, J. Kataoka, Satoru Katsuda, N. Kawai, Richard L Kelley, Caroline A Kilbourne, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, M. Kokubun, Katsuji Koyama, Shu Koyama, P. Kretschmar, H. Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, S.-H. Lee, Maurice A. Leutenegger, Olivier Limousin, Michael Loewenstein, Knox S. Long, David H. Lumb, G. M. Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, D. McCammon, Brian R McNamara, M. Mehdipour, Eric D. Miller, J. M. Mïller, Shin Mineshige

Publications of the Astronomical Society of Japan · 2018

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Summary

Abstract The Hitomi Soft X-ray Spectrometer spectrum of the Perseus cluster, with ∼5 eV resolution in the 2–9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collisional plasmas. It reveals both successes and challenges of the current atomic data and models. The latest versions of AtomDB/APEC (3.0.8), SPEX (3.03.00), and CHIANTI (8.0) all provide reasonable fits to the broad-band spectrum, and are in close agreement on best-fit temperature, emission measure, and abundances of a few elements such as Ni. For the Fe abundance, the APEC and SPEX measurements differ by 16%, which is 17 times higher than the statistical uncertainty. This is mostly attributed to the differences in adopted collisional excitation and dielectronic recombination rates of the st

Source type: Peer-reviewed study
DOI: 10.1093/pasj/psx156
Catalogue ID: SNmoic280f-0r4s74

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