論文 - 山内 誠
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Radiation hardness of a p-channel notch CCD developed for the X-ray CCD camera onboard the XRISM satellite 査読あり
Y. Kanemaru, J. Sato, K. Mori, Y. Nishioka, A. Takeda, M.Yamauchi, I. Hatsukade, 他26名
Journal of Instrumentation 14 ( 4 ) C04003-1 - 10 2019年4月
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Detection of polarized gamma-ray emission from the Crab nebula with the Hitomi Soft Gamma-ray Detector 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他188名
Publications of the Astronomical Society of Japan 70 ( 6 ) id.113-1 - id.113-19 2018年12月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psy118
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Soft x-ray imaging telescope (Xtend) onboard X-ray Astronomy Recovery Mission (XARM) 査読あり
K. Hayashida, H. Tomida, K. Mori, H. Nakajima, M.Yamauchi, 他35名
Proceedings of SPIE - The International Society for Optical Engineering 10699 id.1069923-1 - id.1069923-11 2018年7月
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Concept of the X-ray Astronomy Recovery Mission 査読あり
M. Tashiro, H. Maejima, K. Toda, R. Kelley, M.Yamauchi, 他175名
Proceedings of the SPIE 10699 id.1069922-1 - id.1069922-12 2018年7月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
DOI： 10.1117/12.2309455
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Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M.Yamauchi, 他191名
Publications of the Astronomical Society of Japan 70 ( 3 ) id.38-1 - id.38-16 2018年6月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psy027
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Hitomi (ASTRO-H) X-ray Astronomy Satellite 査読あり
T. Takahashi, M. Kokubun, K. Mitsuda, R. L. Kelley, M.Yamauchi, 他265名
Journal of Astronomical Telescopes, Instruments, and Systems 4 id.021402-1 - id.021402-13 2018年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Atmospheric gas dynamics in the Perseus cluster observed with Hitomi 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M.Yamauchi, 他192名
Publications of the Astronomical Society of Japan 70 ( 2 ) 9-1 - 9-32 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psx138
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In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H) 査読あり
H. Nakajima, Y. Maeda, H. Uchida, T. Tanaka, M. Yamauchi, 他44名
Publications of the Astronomical Society of Japan 70 ( 2 ) 21-1 - 21-17 2018年3月
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Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他188名
Publications of the Astronomical Society of Japan 70 ( 2 ) 17-1 - 17-17 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psx154
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Hitomi observations of the LMC SNR N 132 D: Highly redshifted X-ray emission from iron ejecta 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他188名
Publications of the Astronomical Society of Japan 70 ( 2 ) 16-1 - 16-19 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psx151
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Hitomi X-ray studies of giant radio pulses from the Crab pulsar 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他198名
Publications of the Astronomical Society of Japan 70 ( 2 ) 15-1 - 15-18 2018年3月
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Search for thermal X-ray features from the Crab nebula with the Hitomi soft X-ray spectrometer 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他189名
Publications of the Astronomical Society of Japan 70 ( 2 ) 14-1 - 14-17 2018年3月
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Hitomi observation of radio galaxy NGC 1275: The first X-ray microcalorimeter spectroscopy of Fe-Kalpha line emission from an active galactic nucleus 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他188名
Publications of the Astronomical Society of Japan 70 ( 2 ) 13-1 - 13-20 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psx147
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Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他189名
Publications of the Astronomical Society of Japan 70 ( 2 ) 12-1 - 12-48 2018年3月
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Temperature structure in the Perseus cluster core observed with Hitomi 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他189名
Publications of the Astronomical Society of Japan 70 ( 2 ) 11-1 - 11-30 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psy004
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Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS 査読あり
F. Aharonian, H. Akamatsu, F. Akimoto, S. W. Allen, M. Yamauchi, 他189名
Publications of the Astronomical Society of Japan 70 ( 2 ) 10-1 - 10-29 2018年3月
記述言語：英語 掲載種別：研究論文（学術雑誌）
DOI： 10.1093/pasj/psx127
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Soft X-ray Imager aboard Hitomi (ASTRO-H) 査読あり
T. Tanaka, H. Uchida, H. Nakajima, H. Tsunemi, M. Yamauchi, 他 23名
Journal of Astronomical Telescopes, Instruments, and Systems 4 ( 1 ) 011211-1 - 011211-15 2018年2月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Solar abundance ratios of the iron-peak elements in the Perseus cluster 査読あり
Aharonian F., Akamatsu H., Akimoto F., Allen S., Angelini L., Audard M., Awaki H., Axelsson M., Bamba A., Bautz M., Blandford R., Brenneman L., Brown G., Bulbul E., Cackett E., Chernyakova M., Chiao M., Coppi P., Costantini E., De Plaa J., Den Herder J., Done C., Dotani T., Ebisawa K., Eckart M., Enoto T., Ezoe Y., Fabian A., Ferrigno C., Foster A., Fujimoto R., Fukazawa Y., Furuzawa A., Galeazzi M., Gallo L., Gandhi P., Giustini M., Goldwurm A., Gu L., Guainazzi M., Haba Y., Hagino K., Hamaguchi K., Harrus I., Hatsukade I., Hayashi K., Hayashi T., Hayashida K., Hiraga J., Hornschemeier A., Hoshino A., Hughes J., 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 R., Kilbourne C., Kitaguchi T., Kitamoto S., Kitayama T., Kohmura T., Kokubun M., Koyama K., Koyama S., Kretschmar P., Krimm H., Kubota A., Kunieda H., Laurent P., Lee S., Leutenegger M., Limousine O., Loewenstein M., Long K., Lumb D.
Nature 551 ( 7681 ) 478 - 480 2017年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Nature
© 2017 Macmillan Publishers Limited, part of Springer Nature. The metal abundance of the hot plasma that permeates galaxy clusters represents the accumulation of heavy elements produced by billions of supernovae. Therefore, X-ray spectroscopy of the intracluster medium provides an opportunity to investigate the nature of supernova explosions integrated over cosmic time. In particular, the abundance of the iron-peak elements (chromium, manganese, iron and nickel) is key to understanding how the progenitors of typical type Ia supernovae evolve and explode. Recent X-ray studies of the intracluster medium found that the abundance ratios of these elements differ substantially from those seen in the Sun, suggesting differences between the nature of type Ia supernovae in the clusters and in the Milky Way. However, because the K-shell transition lines of chromium and manganese are weak and those of iron and nickel are very close in photon energy, high-resolution spectroscopy is required for an accurate determination of the abundances of these elements. Here we report observations of the Perseus cluster, with statistically significant detections of the resonance emission from chromium, manganese and nickel. Our measurements, combined with the latest atomic models, reveal that these elements have near-solar abundance ratios with respect to iron, in contrast to previous claims. Comparison between our results and modern nucleosynthesis calculations disfavours the hypothesis that type Ia supernova progenitors are exclusively white dwarfs with masses well below the Chandrasekhar limit (about 1.4 times the mass of the Sun). The observed abundance pattern of the iron-peak elements can be explained by taking into account a combination of near- A nd sub-Chandrasekhar-mass type Ia supernova systems, adding to the mounting evidence that both progenitor types make a substantial contribution to cosmic chemical enrichment.
DOI： 10.1038/nature24301
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Multi-messenger Observations of a Binary Neutron Star Merger 査読あり
B. P. Abbott, K. Ebisawa, C. Hanyu, S. Harita, T. Hashimoto, K. Hidaka, T. Hori, M. Ishikawa, N. Isobe, W. Iwakiri, H. Kawai, N. Kawai, T. Kawamuro, T. Kawase, Y. Kitaoka, K. Makishima, M. Matsuoka, T. Mihara, T. Morita, K. Morita, S. Nakahira, M. Nakajima, Y. Nakamura, H. Negoro, S. Oda, A. Sakamaki, R. Sasaki, M. Serino, M. Shidatsu, R. Shimomukai, Y. Sugawara, S. Sugita, M. Sugizaki, Y. Tachibana, Y. Takao, A. Tanimoto, H. Tomida, Y. Tsuboi, H. Tsunemi, Y. Ueda, S. Ueno, S. Yamada, K. Yamaoka, M. Yamauchi, F. Yatabe, T. Yoneyama, T. Yoshii
The Astrophysical Journal Letters 848 ( id. L12 ) 1 - 59 2017年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~ 1.7 {{s}} with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of {40}-8+8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 {M}o . An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~ 40 {{Mpc}}) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position ~ 9 and ~ 16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC 4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta.
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Suzaku Wide-band All-sky Monitor (WAM) observations of GRBs and SGRs 査読あり
Yamaoka K., Ohno M., Tashiro M., Hurley K., Krimm H., Lien A., Ohmori N., Sugita S., Urata Y., Yasuda T., Enomoto J., Fujinuma T., Fukazawa Y., Hanabata Y., Iwakiri W., Kawano T., Kinoshita R., Kokubun M., Makishima K., Matsuoka S., Nagayoshi T., Nakagawa Y., Nakaya S., Nakazawa K., Nishioka Y., Sakamoto T., Takahashi T., Takeda S., Terada Y., Yabe S., Yamauchi M., Yoshida H.
Publications of the Astronomical Society of Japan 69 ( 3 ) 2017年6月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Publications of the Astronomical Society of Japan
© The Author 2017. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. For Permissions, please email:. We will review results for gamma-ray bursts (GRBs) and soft gamma repeaters (SGRs), obtained from the Suzaku Wide-band All-sky Monitor (WAM) which operated for about 10 years from 2005 to 2015. The WAM is a BGO (bismuth germanate: Bi 4 Ge 3 O 12) lateral shield for the Hard X-ray Detector (HXD), used mainly for rejecting its detector background, but it also works as an all-sky monitor for soft gamma-ray transients in the 50-5000 keV range thanks to its large effective area (∼600 cm 2 at 1 MeV for one detector) and wide field of view (about half of the entire sky). The WAM actually detected more than 1400 GRBs and 300 bursts from SGRs, and this detection number is comparable to that of other GRB-specific instruments. Based on the 10 years of operation, we describe timing and spectral performance for short GRBs, weak GRBs with high redshifts, and time-resolved pulses with good statistics.
DOI： 10.1093/pasj/psx026