Measurements of resonant scattering in the Perseus Cluster core
with Hitomi SXS

AHARONIAN, F., H. AKAMATSU, F. AKIMOTO, S.W. ALLEN, L. ANGELINI, M. AUDARD, H. AWAKI, M. AXELSSON, A. BAMBA, MW. BAUTZ, R. BLANDFORD, LW. BRENNEMAN, GV. BROWN, E. BULBUL, EM. CACKETT, M. CHERNYAKOVA, MP. CHIAO, PS. COPPI, E. COSTANTINI, J. DE PLAA, CP. DE VRIES, J.W. DEN HERDER, C. DONE, T. DOTANI, K. EBISAWA, ME. ECKART, T. ENOTO, Y. EZOE, A.C. FABIAN, C. FERRIGNO, A.R. FOSTER, R. FUJIMOTO, Y. FUKAZAWA, M. FURUKAWA, A. FURUZAWA, M. GALEAZZI, L.C. GALLO, P. GANDHI, M. GIUSTINI, A. GOLDWURM, Gu LY, M. GUAINAZZI, Y. HABA, K. HAGINO, K. HAMAGUCHI, IM. HARRUS, I. HATSUKADE, K. HAYASHI, T. HAYASHI, K. HAYASHIDA, JS. HIRAGA, A. HORNSCHEMEIER, A. HOSHINO, JP. HUGHES, Y. ICHINOHE, R. IIZUKA, H. INOUE, Y. INOUE, M. ISHIDA, K. ISHIKAWA, Y. ISHISAKI, M. IWAI, J. KAASTRA, T. KALLMAN, T. KAMAE, J. KATAOKA, S. KATSUDA, N. KAWAI, RL. KELLEY, CA. KILBOURNE, T. KITAGUCHI, S. KITAMOTO, T. KITAYAMA, T. KOHMURA, M. KOKUBUN, K. KOYAMA, S. KOYAMA, P. KRETSCHMAR, HA. KRIMM, A. KUBOTA, H. KUNIEDA, P. LAURENT, SH. LEE, MA. LEUTENEGGER, OO. LIMOUSIN, M. LOEWENSTEIN, KS. LONG, D. LUMB, G. MADEJSKI, Y. MAEDA, D. MAIER, K. MAKISHIMA, M. MARKEVITCH, H. MATSUMOTO, K. MATSUSHITA, D. MCCAMMON, BR. MCNAMARA, M. MEHDIPOUR, ED. MILLER, JM. MILLER, S. MINESHIGE, K. MITSUDA, I. MITSUISHI, T. MIYAZAWA, T. MIZUNO, H. MORI, K. MORI, K. MUKAI, H. MURAKAMI, R.F. MUSHOTZKY, T. NAKAGAWA, H. NAKAJIMA, T. NAKAMORI, S. NAKASHIMA, K. NAKAZAWA, KK. NORUKAWA, M. NOBUKAWA, H. NODA, H. ODAKA, A. OGORZALEK, T. OHASHI, M. OHNO, T. OKAJIMA, N. OTA, M. OZAKI, F. PAERELS, S. PALTANI, R. PETRE, C. PINTO, FS. PORTER, K. POTTSCHMIDT, C.S. REYNOLDS, S. SAFI-HARB, S. SAITO, K. SAKAI, T. SASAKI, G. SATO, K. SATO, R. SATO, M. SAWADA, N. SCHARTEL, P.J. SERLEMITSOS, H. SETA, M. SHIDATSU, A. SIMIONESCU, RK. SMITH, Y. SOONG, L. STAWARZ, Y. SUGAWARA, S. SUGITA, A. SZYMKOWIAK, H. TAJIMA, H. TAKAHASHI, T. TAKAHASHI, S. TAKEDA, Y. TAKEI, T. TAMAGAWA, T. TAMURA, T. TANAKA, Y. TANAKA, YT. TANAKA, MS. TASHIRO, Y. TAWARA, Y. TERADA, Y. TERASHIMA, F. TOMBESI, H. TOMIDA, Y. TSUBOI, M. TSUJIMOTO, H. TSUNEMI, TG. TSURU, H. UCHIDA, H. UCHIYAMA, Y. UCHIYAMA, S. UEDA, Y. UEDA, S. UNO, C.M. URRY, E. URSINO, S. WATANABE, Norbert WERNER, DR. WILKINS, BJ. WILLIAMS, S. YAMADA, H. YAMAGUCHI, K. YAMAOKA, NY. YAMASAKI, M. YAMAUCHI, S. YAMAUCHI, T. YAQOOB, Y. YATSU, D. YONETOKU, I. ZHURAVLEVA and A. ZOGHBI. Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN. OXFORD: OXFORD UNIV PRESS, 2018, vol. 70, No 2, p. "10-1"-"10-29", 29 pp. ISSN 0004-6264. Available from: https://dx.doi.org/10.1093/pasj/psx127.

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@article{1440338,
   author = {Aharonian, F. and Akamatsu, H. and Akimoto, F. and Allen, S.W. and Angelini, L. and Audard, M. and Awaki, H. and Axelsson, M. and Bamba, A. and Bautz, MW. and Blandford, R. and Brenneman, LW. and Brown, GV. and Bulbul, E. and Cackett, EM. and Chernyakova, M. and Chiao, MP. and Coppi, PS. and Costantini, E. and de Plaa, J. and de Vries, CP. and den Herder, J.W. and Done, C. and Dotani, T. and Ebisawa, K. and Eckart, ME. and Enoto, T. and Ezoe, Y. and Fabian, A.C. and Ferrigno, C. and Foster, A.R. and Fujimoto, R. and Fukazawa, Y. and Furukawa, M. and Furuzawa, A. and Galeazzi, M. and Gallo, L.C. and Gandhi, P. and Giustini, M. and Goldwurm, A. and LY, Gu and Guainazzi, M. and Haba, Y. and Hagino, K. and Hamaguchi, K. and Harrus, IM. and Hatsukade, I. and Hayashi, K. and Hayashi, T. and Hayashida, K. and Hiraga, JS. and Hornschemeier, A. and Hoshino, A. and Hughes, JP. and Ichinohe, Y. and Iizuka, R. and Inoue, H. and Inoue, Y. and Ishida, M. and Ishikawa, K. and Ishisaki, Y. and Iwai, M. and Kaastra, J. and Kallman, T. and Kamae, T. and Kataoka, J. and Katsuda, S. and Kawai, N. and Kelley, RL. and Kilbourne, CA. and Kitaguchi, T. and Kitamoto, S. and Kitayama, T. and Kohmura, T. and Kokubun, M. and Koyama, K. and Koyama, S. and Kretschmar, P. and Krimm, HA. and Kubota, A. and Kunieda, H. and Laurent, P. and Lee, SH. and Leutenegger, MA. and Limousin, OO. and Loewenstein, M. and Long, KS. and Lumb, D. and Madejski, G. and Maeda, Y. and Maier, D. and Makishima, K. and Markevitch, M. and Matsumoto, H. and Matsushita, K. and McCammon, D. and McNamara, BR. and Mehdipour, M. and Miller, ED. and Miller, JM. and Mineshige, S. and Mitsuda, K. and Mitsuishi, I. and Miyazawa, T. and Mizuno, T. and Mori, H. and Mori, K. and Mukai, K. and Murakami, H. and Mushotzky, R.F. and Nakagawa, T. and Nakajima, H. and Nakamori, T. and Nakashima, S. and Nakazawa, K. and Norukawa, KK. and Nobukawa, M. and Noda, H. and Odaka, H. and Ogorzalek, A. and Ohashi, T. and Ohno, M. and Okajima, T. and Ota, N. and Ozaki, M. and Paerels, F. and Paltani, S. and Petre, R. and Pinto, C. and Porter, FS. and Pottschmidt, K. and Reynolds, C.S. and SafiandHarb, S. and Saito, S. and Sakai, K. and Sasaki, T. and Sato, G. and Sato, K. and Sato, R. and Sawada, M. and Schartel, N. and Serlemitsos, P.J. and Seta, H. and Shidatsu, M. and Simionescu, A. and Smith, RK. and Soong, Y. and Stawarz, L. and Sugawara, Y. and Sugita, S. and Szymkowiak, A. and Tajima, H. and Takahashi, H. and Takahashi, T. and Takeda, S. and Takei, Y. and Tamagawa, T. and Tamura, T. and Tanaka, T. and Tanaka, Y. and Tanaka, YT. and Tashiro, MS. and Tawara, Y. and Terada, Y. and Terashima, Y. and Tombesi, F. and Tomida, H. and Tsuboi, Y. and Tsujimoto, M. and Tsunemi, H. and Tsuru, TG. and Uchida, H. and Uchiyama, H. and Uchiyama, Y. and Ueda, S. and Ueda, Y. and Uno, S. and Urry, C.M. and Ursino, E. and Watanabe, S. and Werner, Norbert and Wilkins, DR. and Williams, BJ. and Yamada, S. and Yamaguchi, H. and Yamaoka, K. and Yamasaki, NY. and Yamauchi, M. and Yamauchi, S. and Yaqoob, T. and Yatsu, Y. and Yonetoku, D. and Zhuravleva, I. and Zoghbi, A.},
   article_location = {OXFORD},
   article_number = {2},
   doi = {http://dx.doi.org/10.1093/pasj/psx127},
   keywords = {galaxies: clusters: individual (Perseus Cluster); galaxies: clusters: intracluster medium; X-rays: galaxies: clusters},
   language = {eng},
   issn = {0004-6264},
   journal = {PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN},
   title = {Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS},
   url = {https://academic.oup.com/pasj/article/70/2/10/4969722},
   volume = {70},
   year = {2018}
}

TY  - JOUR
ID  - 1440338
AU  - Aharonian, F. - Akamatsu, H. - Akimoto, F. - Allen, S.W. - Angelini, L. - Audard, M. - Awaki, H. - Axelsson, M. - Bamba, A. - Bautz, MW. - Blandford, R. - Brenneman, LW. - Brown, GV. - Bulbul, E. - Cackett, EM. - Chernyakova, M. - Chiao, MP. - Coppi, PS. - Costantini, E. - de Plaa, J. - de Vries, CP. - den Herder, J.W. - Done, C. - Dotani, T. - Ebisawa, K. - Eckart, ME. - Enoto, T. - Ezoe, Y. - Fabian, A.C. - Ferrigno, C. - Foster, A.R. - Fujimoto, R. - Fukazawa, Y. - Furukawa, M. - Furuzawa, A. - Galeazzi, M. - Gallo, L.C. - Gandhi, P. - Giustini, M. - Goldwurm, A. - LY, Gu - Guainazzi, M. - Haba, Y. - Hagino, K. - Hamaguchi, K. - Harrus, IM. - Hatsukade, I. - Hayashi, K. - Hayashi, T. - Hayashida, K. - Hiraga, JS. - Hornschemeier, A. - Hoshino, A. - Hughes, JP. - Ichinohe, Y. - Iizuka, R. - Inoue, H. - Inoue, Y. - Ishida, M. - Ishikawa, K. - Ishisaki, Y. - Iwai, M. - Kaastra, J. - Kallman, T. - Kamae, T. - Kataoka, J. - Katsuda, S. - Kawai, N. - Kelley, RL. - Kilbourne, CA. - Kitaguchi, T. - Kitamoto, S. - Kitayama, T. - Kohmura, T. - Kokubun, M. - Koyama, K. - Koyama, S. - Kretschmar, P. - Krimm, HA. - Kubota, A. - Kunieda, H. - Laurent, P. - Lee, SH. - Leutenegger, MA. - Limousin, OO. - Loewenstein, M. - Long, KS. - Lumb, D. - Madejski, G. - Maeda, Y. - Maier, D. - Makishima, K. - Markevitch, M. - Matsumoto, H. - Matsushita, K. - McCammon, D. - McNamara, BR. - Mehdipour, M. - Miller, ED. - Miller, JM. - Mineshige, S. - Mitsuda, K. - Mitsuishi, I. - Miyazawa, T. - Mizuno, T. - Mori, H. - Mori, K. - Mukai, K. - Murakami, H. - Mushotzky, R.F. - Nakagawa, T. - Nakajima, H. - Nakamori, T. - Nakashima, S. - Nakazawa, K. - Norukawa, KK. - Nobukawa, M. - Noda, H. - Odaka, H. - Ogorzalek, A. - Ohashi, T. - Ohno, M. - Okajima, T. - Ota, N. - Ozaki, M. - Paerels, F. - Paltani, S. - Petre, R. - Pinto, C. - Porter, FS. - Pottschmidt, K. - Reynolds, C.S. - Safi-Harb, S. - Saito, S. - Sakai, K. - Sasaki, T. - Sato, G. - Sato, K. - Sato, R. - Sawada, M. - Schartel, N. - Serlemitsos, P.J. - Seta, H. - Shidatsu, M. - Simionescu, A. - Smith, RK. - Soong, Y. - Stawarz, L. - Sugawara, Y. - Sugita, S. - Szymkowiak, A. - Tajima, H. - Takahashi, H. - Takahashi, T. - Takeda, S. - Takei, Y. - Tamagawa, T. - Tamura, T. - Tanaka, T. - Tanaka, Y. - Tanaka, YT. - Tashiro, MS. - Tawara, Y. - Terada, Y. - Terashima, Y. - Tombesi, F. - Tomida, H. - Tsuboi, Y. - Tsujimoto, M. - Tsunemi, H. - Tsuru, TG. - Uchida, H. - Uchiyama, H. - Uchiyama, Y. - Ueda, S. - Ueda, Y. - Uno, S. - Urry, C.M. - Ursino, E. - Watanabe, S. - Werner, Norbert - Wilkins, DR. - Williams, BJ. - Yamada, S. - Yamaguchi, H. - Yamaoka, K. - Yamasaki, NY. - Yamauchi, M. - Yamauchi, S. - Yaqoob, T. - Yatsu, Y. - Yonetoku, D. - Zhuravleva, I. - Zoghbi, A.
PY  - 2018
TI  - Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS
JF  - PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
VL  - 70
IS  - 2
SP  - "10-1"-"10-29"
EP  - "10-1"-"10-29"
PB  - OXFORD UNIV PRESS
SN  - 00046264
KW  - galaxies: clusters: individual (Perseus Cluster)
KW  - galaxies: clusters: intracluster medium
KW  - X-rays: galaxies: clusters
UR  - https://academic.oup.com/pasj/article/70/2/10/4969722
N2  - Thanks to its high spectral resolution (similar to 5 eV at 6 keV), the Soft X-ray Spectrometer (SXS) on board Hitomi enables us to measure the detailed structure of spatially resolved emission lines from highly ionized ions in galaxy clusters for the first time. In this series of papers, using the SXS we have measured the velocities of gas motions, metallicities and the multi-temperature structure of the gas in the core of the Perseus Cluster. Here, we show that when inferring physical properties from line emissivities in systems like Perseus, the resonant scattering effect should be taken into account. In the Hitomi waveband, resonant scattering mostly affects the Fe XXV He alpha line (w)-the strongest line in the spectrum. The flux measured by Hitomi in this line is suppressed by a factor of similar to 1.3 in the inner similar to 30 kpc, compared to predictions for an optically thin plasma; the suppression decreases with the distance from the center. The w line also appears slightly broader than other lines from the same ion. The observed distortions of the w line flux, shape, and distance dependence are all consistent with the expected effect of the resonant scattering in the Perseus core. By measuring the ratio of fluxes in optically thick (w) and thin (Fe XXV forbidden, He beta, Ly alpha) lines, and comparing these ratios with predictions from Monte Carlo radiative transfer simulations, the velocities of gas motions have been obtained. The results are consistent with the direct measurements of gas velocities from line broadening described elsewhere in this series, although the systematic and statistical uncertainties remain significant. Further improvements in the predictions of line emissivities in plasma models, and deeper observations with future X-ray missions offering similar or better capabilities to the Hitomi SXS, will enable resonant scattering measurements to provide powerful constraints on the amplitude and anisotropy of cluster gas motions.
ER  -

AHARONIAN, F., H. AKAMATSU, F. AKIMOTO, S.W. ALLEN, L. ANGELINI, M. AUDARD, H. AWAKI, M. AXELSSON, A. BAMBA, MW. BAUTZ, R. BLANDFORD, LW. BRENNEMAN, GV. BROWN, E. BULBUL, EM. CACKETT, M. CHERNYAKOVA, MP. CHIAO, PS. COPPI, E. COSTANTINI, J. DE PLAA, CP. DE VRIES, J.W. DEN HERDER, C. DONE, T. DOTANI, K. EBISAWA, ME. ECKART, T. ENOTO, Y. EZOE, A.C. FABIAN, C. FERRIGNO, A.R. FOSTER, R. FUJIMOTO, Y. FUKAZAWA, M. FURUKAWA, A. FURUZAWA, M. GALEAZZI, L.C. GALLO, P. GANDHI, M. GIUSTINI, A. GOLDWURM, Gu LY, M. GUAINAZZI, Y. HABA, K. HAGINO, K. HAMAGUCHI, IM. HARRUS, I. HATSUKADE, K. HAYASHI, T. HAYASHI, K. HAYASHIDA, JS. HIRAGA, A. HORNSCHEMEIER, A. HOSHINO, JP. HUGHES, Y. ICHINOHE, R. IIZUKA, H. INOUE, Y. INOUE, M. ISHIDA, K. ISHIKAWA, Y. ISHISAKI, M. IWAI, J. KAASTRA, T. KALLMAN, T. KAMAE, J. KATAOKA, S. KATSUDA, N. KAWAI, RL. KELLEY, CA. KILBOURNE, T. KITAGUCHI, S. KITAMOTO, T. KITAYAMA, T. KOHMURA, M. KOKUBUN, K. KOYAMA, S. KOYAMA, P. KRETSCHMAR, HA. KRIMM, A. KUBOTA, H. KUNIEDA, P. LAURENT, SH. LEE, MA. LEUTENEGGER, OO. LIMOUSIN, M. LOEWENSTEIN, KS. LONG, D. LUMB, G. MADEJSKI, Y. MAEDA, D. MAIER, K. MAKISHIMA, M. MARKEVITCH, H. MATSUMOTO, K. MATSUSHITA, D. MCCAMMON, BR. MCNAMARA, M. MEHDIPOUR, ED. MILLER, JM. MILLER, S. MINESHIGE, K. MITSUDA, I. MITSUISHI, T. MIYAZAWA, T. MIZUNO, H. MORI, K. MORI, K. MUKAI, H. MURAKAMI, R.F. MUSHOTZKY, T. NAKAGAWA, H. NAKAJIMA, T. NAKAMORI, S. NAKASHIMA, K. NAKAZAWA, KK. NORUKAWA, M. NOBUKAWA, H. NODA, H. ODAKA, A. OGORZALEK, T. OHASHI, M. OHNO, T. OKAJIMA, N. OTA, M. OZAKI, F. PAERELS, S. PALTANI, R. PETRE, C. PINTO, FS. PORTER, K. POTTSCHMIDT, C.S. REYNOLDS, S. SAFI-HARB, S. SAITO, K. SAKAI, T. SASAKI, G. SATO, K. SATO, R. SATO, M. SAWADA, N. SCHARTEL, P.J. SERLEMITSOS, H. SETA, M. SHIDATSU, A. SIMIONESCU, RK. SMITH, Y. SOONG, L. STAWARZ, Y. SUGAWARA, S. SUGITA, A. SZYMKOWIAK, H. TAJIMA, H. TAKAHASHI, T. TAKAHASHI, S. TAKEDA, Y. TAKEI, T. TAMAGAWA, T. TAMURA, T. TANAKA, Y. TANAKA, YT. TANAKA, MS. TASHIRO, Y. TAWARA, Y. TERADA, Y. TERASHIMA, F. TOMBESI, H. TOMIDA, Y. TSUBOI, M. TSUJIMOTO, H. TSUNEMI, TG. TSURU, H. UCHIDA, H. UCHIYAMA, Y. UCHIYAMA, S. UEDA, Y. UEDA, S. UNO, C.M. URRY, E. URSINO, S. WATANABE, Norbert WERNER, DR. WILKINS, BJ. WILLIAMS, S. YAMADA, H. YAMAGUCHI, K. YAMAOKA, NY. YAMASAKI, M. YAMAUCHI, S. YAMAUCHI, T. YAQOOB, Y. YATSU, D. YONETOKU, I. ZHURAVLEVA and A. ZOGHBI. Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS. \textit{PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN}. OXFORD: OXFORD UNIV PRESS, 2018, vol.~70, No~2, p.~''10-1''-''10-29'', 29 pp. ISSN~0004-6264. Available from: https://dx.doi.org/10.1093/pasj/psx127.

Basic information
Original name	Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS
Authors	AHARONIAN, F. (276 Germany), H. AKAMATSU (840 United States of America), F. AKIMOTO (840 United States of America), S.W. ALLEN (826 United Kingdom of Great Britain and Northern Ireland), L. ANGELINI (380 Italy), M. AUDARD (250 France), H. AWAKI (840 United States of America), M. AXELSSON (840 United States of America), A. BAMBA (840 United States of America), MW. BAUTZ (840 United States of America), R. BLANDFORD (826 United Kingdom of Great Britain and Northern Ireland), LW. BRENNEMAN (840 United States of America), GV. BROWN (840 United States of America), E. BULBUL (840 United States of America), EM. CACKETT (840 United States of America), M. CHERNYAKOVA (840 United States of America), MP. CHIAO (840 United States of America), PS. COPPI (840 United States of America), E. COSTANTINI (380 Italy), J. DE PLAA (528 Netherlands), CP. DE VRIES (528 Netherlands), J.W. DEN HERDER (528 Netherlands), C. DONE (826 United Kingdom of Great Britain and Northern Ireland), T. DOTANI (840 United States of America), K. EBISAWA (840 United States of America), ME. ECKART (840 United States of America), T. ENOTO (840 United States of America), Y. EZOE (840 United States of America), A.C. FABIAN (826 United Kingdom of Great Britain and Northern Ireland), C. FERRIGNO (380 Italy), A.R. FOSTER (840 United States of America), R. FUJIMOTO (840 United States of America), Y. FUKAZAWA (840 United States of America), M. FURUKAWA (840 United States of America), A. FURUZAWA (840 United States of America), M. GALEAZZI (380 Italy), L.C. GALLO (380 Italy), P. GANDHI (826 United Kingdom of Great Britain and Northern Ireland), M. GIUSTINI (380 Italy), A. GOLDWURM (840 United States of America), Gu LY (528 Netherlands), M. GUAINAZZI (380 Italy), Y. HABA (840 United States of America), K. HAGINO (840 United States of America), K. HAMAGUCHI (840 United States of America), IM. HARRUS (840 United States of America), I. HATSUKADE (840 United States of America), K. HAYASHI (840 United States of America), T. HAYASHI (840 United States of America), K. HAYASHIDA (840 United States of America), JS. HIRAGA (840 United States of America), A. HORNSCHEMEIER (840 United States of America), A. HOSHINO (840 United States of America), JP. HUGHES (840 United States of America), Y. ICHINOHE (840 United States of America), R. IIZUKA (840 United States of America), H. INOUE (840 United States of America), Y. INOUE (840 United States of America), M. ISHIDA (840 United States of America), K. ISHIKAWA (840 United States of America), Y. ISHISAKI (840 United States of America), M. IWAI (840 United States of America), J. KAASTRA (528 Netherlands), T. KALLMAN (840 United States of America), T. KAMAE (840 United States of America), J. KATAOKA (840 United States of America), S. KATSUDA (840 United States of America), N. KAWAI (840 United States of America), RL. KELLEY (840 United States of America), CA. KILBOURNE (840 United States of America), T. KITAGUCHI (840 United States of America), S. KITAMOTO (840 United States of America), T. KITAYAMA (840 United States of America), T. KOHMURA (840 United States of America), M. KOKUBUN (840 United States of America), K. KOYAMA (840 United States of America), S. KOYAMA (840 United States of America), P. KRETSCHMAR (840 United States of America), HA. KRIMM (840 United States of America), A. KUBOTA (840 United States of America), H. KUNIEDA (840 United States of America), P. LAURENT (840 United States of America), SH. LEE (250 France), MA. LEUTENEGGER (840 United States of America), OO. LIMOUSIN (250 France), M. LOEWENSTEIN (840 United States of America), KS. LONG (840 United States of America), D. LUMB (840 United States of America), G. MADEJSKI (616 Poland), Y. MAEDA (840 United States of America), D. MAIER (840 United States of America), K. MAKISHIMA (840 United States of America), M. MARKEVITCH (643 Russian Federation), H. MATSUMOTO (840 United States of America), K. MATSUSHITA (840 United States of America), D. MCCAMMON (840 United States of America), BR. MCNAMARA (840 United States of America), M. MEHDIPOUR (528 Netherlands), ED. MILLER (840 United States of America), JM. MILLER (840 United States of America), S. MINESHIGE (840 United States of America), K. MITSUDA (840 United States of America), I. MITSUISHI (840 United States of America), T. MIYAZAWA (840 United States of America), T. MIZUNO (840 United States of America), H. MORI (840 United States of America), K. MORI (840 United States of America), K. MUKAI (840 United States of America), H. MURAKAMI (840 United States of America), R.F. MUSHOTZKY (840 United States of America), T. NAKAGAWA (840 United States of America), H. NAKAJIMA (840 United States of America), T. NAKAMORI (840 United States of America), S. NAKASHIMA (840 United States of America), K. NAKAZAWA (840 United States of America), KK. NORUKAWA (840 United States of America), M. NOBUKAWA (840 United States of America), H. NODA (840 United States of America), H. ODAKA (840 United States of America), A. OGORZALEK (616 Poland), T. OHASHI (840 United States of America), M. OHNO (840 United States of America), T. OKAJIMA (840 United States of America), N. OTA (840 United States of America), M. OZAKI (840 United States of America), F. PAERELS (528 Netherlands), S. PALTANI (840 United States of America), R. PETRE (840 United States of America), C. PINTO (380 Italy), FS. PORTER (840 United States of America), K. POTTSCHMIDT (840 United States of America), C.S. REYNOLDS (826 United Kingdom of Great Britain and Northern Ireland), S. SAFI-HARB (840 United States of America), S. SAITO (840 United States of America), K. SAKAI (840 United States of America), T. SASAKI (840 United States of America), G. SATO (840 United States of America), K. SATO (840 United States of America), R. SATO (840 United States of America), M. SAWADA (840 United States of America), N. SCHARTEL (276 Germany), P.J. SERLEMITSOS (840 United States of America), H. SETA (840 United States of America), M. SHIDATSU (840 United States of America), A. SIMIONESCU (642 Romania), RK. SMITH (840 United States of America), Y. SOONG (840 United States of America), L. STAWARZ (616 Poland), Y. SUGAWARA (840 United States of America), S. SUGITA (840 United States of America), A. SZYMKOWIAK (840 United States of America), H. TAJIMA (840 United States of America), H. TAKAHASHI (840 United States of America), T. TAKAHASHI (840 United States of America), S. TAKEDA (840 United States of America), Y. TAKEI (840 United States of America), T. TAMAGAWA (840 United States of America), T. TAMURA (840 United States of America), T. TANAKA (840 United States of America), Y. TANAKA (840 United States of America), YT. TANAKA (840 United States of America), MS. TASHIRO (840 United States of America), Y. TAWARA (840 United States of America), Y. TERADA (840 United States of America), Y. TERASHIMA (840 United States of America), F. TOMBESI (380 Italy), H. TOMIDA (840 United States of America), Y. TSUBOI (840 United States of America), M. TSUJIMOTO (840 United States of America), H. TSUNEMI (840 United States of America), TG. TSURU (840 United States of America), H. UCHIDA (840 United States of America), H. UCHIYAMA (840 United States of America), Y. UCHIYAMA (840 United States of America), S. UEDA (840 United States of America), Y. UEDA (840 United States of America), S. UNO (840 United States of America), C.M. URRY (840 United States of America), E. URSINO (380 Italy), S. WATANABE (840 United States of America), Norbert WERNER (703 Slovakia, guarantor, belonging to the institution), DR. WILKINS (840 United States of America), BJ. WILLIAMS (840 United States of America), S. YAMADA (840 United States of America), H. YAMAGUCHI (840 United States of America), K. YAMAOKA (840 United States of America), NY. YAMASAKI (840 United States of America), M. YAMAUCHI (840 United States of America), S. YAMAUCHI (840 United States of America), T. YAQOOB (840 United States of America), Y. YATSU (840 United States of America), D. YONETOKU (840 United States of America), I. ZHURAVLEVA (643 Russian Federation) and A. ZOGHBI (528 Netherlands).
Edition	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, OXFORD, OXFORD UNIV PRESS, 2018, 0004-6264.

Other information
Original language	English
Type of outcome	Article in a journal
Field of Study	10308 Astronomy
Country of publisher	Japan
Confidentiality degree	is not subject to a state or trade secret
WWW	URL URL
Impact factor	Impact factor: 2.750
RIV identification code	RIV/00216224:14310/18:00103772
Organization unit	Faculty of Science
Doi	http://dx.doi.org/10.1093/pasj/psx127
UT WoS	000432287600002
Keywords in English	galaxies: clusters: individual (Perseus Cluster); galaxies: clusters: intracluster medium; X-rays: galaxies: clusters
Tags	International impact, Reviewed
Changed by	Changed by: Mgr. Marie Šípková, DiS., učo 437722. Changed: 10/11/2022 12:50.

Abstract

Thanks to its high spectral resolution (similar to 5 eV at 6 keV), the Soft X-ray Spectrometer (SXS) on board Hitomi enables us to measure the detailed structure of spatially resolved emission lines from highly ionized ions in galaxy clusters for the first time. In this series of papers, using the SXS we have measured the velocities of gas motions, metallicities and the multi-temperature structure of the gas in the core of the Perseus Cluster. Here, we show that when inferring physical properties from line emissivities in systems like Perseus, the resonant scattering effect should be taken into account. In the Hitomi waveband, resonant scattering mostly affects the Fe XXV He alpha line (w)-the strongest line in the spectrum. The flux measured by Hitomi in this line is suppressed by a factor of similar to 1.3 in the inner similar to 30 kpc, compared to predictions for an optically thin plasma; the suppression decreases with the distance from the center. The w line also appears slightly broader than other lines from the same ion. The observed distortions of the w line flux, shape, and distance dependence are all consistent with the expected effect of the resonant scattering in the Perseus core. By measuring the ratio of fluxes in optically thick (w) and thin (Fe XXV forbidden, He beta, Ly alpha) lines, and comparing these ratios with predictions from Monte Carlo radiative transfer simulations, the velocities of gas motions have been obtained. The results are consistent with the direct measurements of gas velocities from line broadening described elsewhere in this series, although the systematic and statistical uncertainties remain significant. Further improvements in the predictions of line emissivities in plasma models, and deeper observations with future X-ray missions offering similar or better capabilities to the Hitomi SXS, will enable resonant scattering measurements to provide powerful constraints on the amplitude and anisotropy of cluster gas motions.

PrintDisplayed: 27/9/2024 08:39

Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS

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