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

Felix Aharonian , Hiroki Akamatsu , Fumie Akimoto , Stevenw. Allen , Lorella Angelini , Marc Audard , Hisamitsu Awaki , Magnus Axelsson , Aya Bamba , Marshallw. Bautz , Roger Blandford , Lauraw. Brenneman , Gregoryv. Brown , Esra Bulbul , Edward M. Cackett , Maria Chernyakova , Meng P. Chiao , Paolos. Coppi , Elisa Costantini , Jelle de Plaa , Cor P. de Vries , Jan-Willem den Herder , Chris Done , Tadayasu Dotani , Ken Ebisawa , Megane. Eckart , Teruaki Enoto , Yuichiro Ezoe , Andrewc. Fabian , Carlo Ferrigno , Adamr. Foster , Ryuichi Fujimoto , Yasushi Fukazawa , Akihiro Furuzawa , Massimiliano Galeazzi , Luigic. Gallo , Poshak Gandhi , Margherita Giustini , Andrea Goldwurm (1, 2) , Liyi Gu , Matteo Guainazzi , Yoshito Haba , Kouichi Hagino , Kenji Hamaguchi , Ilanam. Harrus , Isamu Hatsukade , Katsuhiro Hayashi , Takayuki Hayashi , Kiyoshi Hayashida , Natalie Hell , Junkos. Hiraga , Ann Hornschemeier , Akio Hoshino , Johnp. Hughes , Yuto Ichinohe , Ryo Iizuka , Hajime Inoue , Yoshiyuki Inoue , Manabu Ishida , Kumi Ishikawa , Yoshitaka Ishisaki , Masachika Iwai , Jelle Kaastra , Tim Kallman , Tsuneyoshi Kamae , Jun Kataoka , Satoru Katsuda , Nobuyuki Kawai , Richardl. Kelley , Carolinea. Kilbourne , Takao Kitaguchi , Shunji Kitamoto , Tetsu Kitayama , Takayoshi Kohmura , Motohide Kokubun , Katsuji Koyama , Shu Koyama , Peter Kretschmar , Hansa. Krimm , Aya Kubota , Hideyo Kunieda , Philippe Laurent (1, 2) , Shiu-Hang Lee , Mauricea. Leutenegger , Olivier Limousin (2) , Michael Loewenstein , Knoxs. Long , David Lumb , Greg Madejski , Yoshitomo Maeda , Daniel Maier (1, 2) , Kazuo Makishima , Maxim Markevitch , Hironori Matsumoto , Kyoko Matsushita , Dan Mccammon , Brianr. Mcnamara , Missagh Mehdipour , Eric D. Miller , Jon M. Miller , Shin Mineshige , Kazuhisa Mitsuda , Ikuyuki Mitsuishi , Takuya Miyazawa , Tsunefumi Mizuno , Hideyuki Mori , Koji Mori , Koji Mukai , Hiroshi Murakami , Richardf. Mushotzky , Takao Nakagawa , Hiroshi Nakajima , Takeshi Nakamori , Shinya Nakashima , Kazuhiro Nakazawa , Kumikok. Nobukawa , Masayoshi Nobukawa , Hirofumi Noda , Hirokazu Odaka , Takaya Ohashi , Masanori Ohno , Takashi Okajima , Naomi Ota , Masanobu Ozaki , Frits Paerels , Stéphane Paltani , Robert Petre , Ciro Pinto , Fredericks. Porter , Katja Pottschmidt , Christophers. Reynolds , Samar Safi-Harb , Shinya Saito , Kazuhiro Sakai , Toru Sasaki , Goro Sato , Kosuke Sato , Rie Sato , Makoto Sawada , Norbert Schartel , Peterj. Serlemtsos , Hiromi Seta , Megumi Shidatsu , Aurora Simionescu , Randallk. Smith , Yang Soong , Łukasz Stawarz , Yasuharu Sugawara , Satoshi Sugita , Andrew Szymkowiak , Hiroyasu Tajima , Hiromitsu Takahashi , Tadayuki Takahashi , Shin'Ichiro Takeda , Yoh Takei , Toru Tamagawa , Takayuki Tamura , Takaaki Tanaka , Yasuo Tanaka , Yasuyukit. Tanaka , Makotos. Tashiro , Yuzuru Tawara , Yukikatsu Terada , Yuichi Terashima , Francesco Tombesi , Hiroshi Tomida , Yohko Tsuboi , Masahiro Tsujimoto , Hiroshi Tsunemi , Takeshi Go Tsuru , Hiroyuki Uchida , Hideki Uchiyama , Yasunobu Uchiyama , Shutaro Ueda , Yoshihiro Ueda , Shin'Ichiro Uno , C.Megan Urry , Eugenio Ursino , Shin Watanabe , Norbert Werner , Dan R. Wilkins , Brianj. Williams , Shinya Yamada , Hiroya Yamaguchi , Kazutaka Yamaoka , Norikoy. Yamasaki , Makoto Yamauchi , Shigeo Yamauchi , Tahir Yaqoob , Yoichi Yatsu , Daisuke Yonetoku , Irina Zhuravleva , Abderahmen Zoghbi , A.Jj. Raassen

1 APC (UMR_7164) - AstroParticule et Cosmologie
2 CEA - Commissariat à l'énergie atomique et aux énergies alternatives

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 strongest emission lines. We further investigate and compare the sensitivity of the derived physical parameters to the astrophysical source modeling and instrumental effects. The Hitomi results show that accurate atomic data and models are as important as the astrophysical modeling and instrumental calibration aspects. Substantial updates of atomic databases and targeted laboratory measurements are needed to get the current data and models ready for the data from the next Hitomi-level mission.

Mots clés: data management; cluster; recombination; excited state; temperature; calibration; sensitivity; statistical; resolution; benchmark; spectral; plasma; X-ray; iron; nickel; dielectric

Domaines: Astrophysique [astro-ph]

Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Stevenw. Allen, Lorella Angelini, et al.. Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi. Publ.Astron.Soc.Jap., 2018, 70 (2), pp.12. ⟨10.1093/pasj/psx156⟩. ⟨hal-01792832⟩