Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi

Steven W. Alle, Felix Aharonian, Hiroki Akamatsu, Fumie Akimoto, Steven W. Allen, Lorella Angelini, Marc Audard, Hisamitsu Awaki, Magnus Axelsson, Aya Bamba, Marshall W. Bautz, Roger Blandford, Laura W. Brenneman, Gregory V. Brown, Esra Bulbul, Edward M. Cackett, Maria Chernyakova, Meng P. Chiao, Paolo S. Coppi, Elisa CostantiniJelle De Plaa, Cor P. De Vries, Jan Willem Den Herder, Chris Done, Tadayasu Dotani, Ken Ebisawa, Megan E. Eckart, Teruaki Enoto, Yuichiro Ezoe, Andrew C. Fabian, Carlo Ferrigno, Adam R. Foster, Ryuichi Fujimoto, Yasushi Fukazawa, Akihiro Furuzawa, Massimiliano Galeazzi, Luigi C. Gallo, Poshak Gandhi, Margherita Giustini, Andrea Goldwurm, Liyi Gu, Matteo Guainazzi, Yoshito Haba, Kouichi Hagino, Kenji Hamaguchi, Ilana M. Harrus, Isamu Hatsukade, Katsuhiro Hayashi, Takayuki Hayashi, Kiyoshi Hayashida, Junko S. Hiraga, Ann Hornschemeier, Akio Hoshino, John P. 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, Richard L. Kelley, Caroline A. Kilbourne, Takao Kitaguchi, Shunji Kitamoto, Tetsu Kitayama, Takayoshi Kohmura, Motohide Kokubun, Katsuji Koyama, Shu Koyama, Peter Kretschmar, Hans A. Krimm, Aya Kubota, Hideyo Kunieda, Philippe Laurent, Shiu Hang Lee, Maurice A. Leutenegger, Olivier O. Limousin, Michael Loewenstein, Knox S. Long, David Lumb, Greg Madejski, Yoshitomo Maeda, Daniel Maier, Kazuo Makishima, Maxim Markevitch, Hironori Matsumoto, Kyoko Matsushita, Dan Mccammon, Brian R. 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, Richard F. Mushotzky, Takao Nakagawa, Hiroshi Nakajima, Takeshi Nakamori, Shinya Nakashima, Kazuhiro Nakazawa, Kumiko K. 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, Frederick S. Porter, Katja Pottschmidt, Christopher S. Reynolds, Samar Safi-Harb, Shinya Saito, Kazuhiro Sakai, Toru Sasaki, Goro Sato, Kosuke Sato, Rie Sato, Makoto Sawada, Norbert Schartel, Peter J. Serlemtsos, Hiromi Seta, Megumi Shidatsu, Aurora Simionescu, Randall K. Smith, Yang Soong, Łukasz Stawarz, Yasuharu Sugawara, Satoshi Sugita, Andrew Szymkowiak, Hiroyasu Tajima, Hiromitsu Takahashi, Tadayuki Takahashi, Shiníchiro Takeda, Yoh Takei, Toru Tamagawa, Takayuki Tamura, Takaaki Tanaka, Yasuo Tanaka, Yasuyuki T. Tanaka, Makoto S. Tashiro, Yuzuru Tawara, Yukikatsu Terada, Yuichi Terashima, Francesco Tombesi, Hiroshi Tomida, Yohko Tsuboi, Masahiro Tsujimoto, Hiroshi Tsunemi, Takeshi Got Suru, Hiroyuki Uchida, Hideki Uchiyama, Yasunobu Uchiyama, Shutaro Ueda, Yoshihiro Ueda, Shiníchiro Uno, C. Megan Urry, Eugenio Ursino, Shin Watanabe, Norbert Werner, Dan R. Wilkins, Brian J. Williams, Shinya Yamada, Hiroya Yamaguchi, Kazutaka Yamaoka, Noriko Y. Yamasaki, Makoto Yamauchi, Shigeo Yamauchi, Tahir Yaqoob, Yoichi Yatsu, Daisuke Yonetoku, Irina Zhuravleva, Abderahmen Zoghbi, Nozomi Nakaniwa

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    We report on a Hitomi observation of IGRJ16318-4848, a high-mass X-ray binary system with an extremely strong absorption of NH ∼ 1024cm 2. Previous X-ray studies revealed that its spectrum is dominated by strong fluorescence lines of Fe as well as continuum emission lines. For physical and geometrical insight into the nature of the reprocessing material, we utilized the high spectroscopic resolving power of the X-ray microcalorimeter (the soft X-ray spectrometer: SXS) and the wide-band sensitivity by the soft and hard X-ray imagers (SXI and HXI) aboard Hitomi. Even though the photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1 and Kα2 lines and puts strong constraints on the line centroid and line width. The line width corresponds to a velocity of 160+-37000 km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from the any X-ray binary, much less than the Doppler broadening and Doppler shift expected from speeds that are characteristic of similar systems. Combined with the K-shell edge energy measured by the SXI and HXI spectra, the ionization state of Fe is estimated to be in the range of Fe I-IV. Considering the estimated ionization parameter and the distance between the X-ray source and the absorber, the density and thickness of the materials are estimated. The extraordinarily strong absorption and the absence of a Compton shoulder component have been confirmed. These characteristics suggest reprocessing materials that are distributed in a narrow solid angle or scattering, primarily by warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. It provides strong motivation for follow-up observations of this and other X-ray binaries using the X-ray Astrophysics Recovery Mission and other comparable future instruments.

    Original languageEnglish
    Article numberpsx154
    JournalPublications of the Astronomical Society of Japan
    Volume70
    Issue number2
    DOIs
    Publication statusPublished - 2018 Mar 1

    Fingerprint

    x rays
    ionization
    astrophysics
    photons
    shoulders
    centroids
    free electrons
    calorimeters
    absorbers
    spectrometer
    fluorescence
    recovery
    scattering
    hydrogen
    spectrometers
    shell
    continuums
    broadband
    electron
    sensitivity

    Keywords

    • Binaries: general
    • Stars: individual (IGR J16318-4848)
    • X-rays: binaries

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Alle, S. W., Aharonian, F., Akamatsu, H., Akimoto, F., Allen, S. W., Angelini, L., ... Nakaniwa, N. (2018). Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi. Publications of the Astronomical Society of Japan, 70(2), [psx154]. https://doi.org/10.1093/pasj/psx154

    Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi. / Alle, Steven W.; Aharonian, Felix; Akamatsu, Hiroki; Akimoto, Fumie; Allen, Steven W.; Angelini, Lorella; Audard, Marc; Awaki, Hisamitsu; Axelsson, Magnus; Bamba, Aya; Bautz, Marshall W.; Blandford, Roger; Brenneman, Laura W.; Brown, Gregory V.; Bulbul, Esra; Cackett, Edward M.; Chernyakova, Maria; Chiao, Meng P.; Coppi, Paolo S.; Costantini, Elisa; De Plaa, Jelle; De Vries, Cor P.; Den Herder, Jan Willem; Done, Chris; Dotani, Tadayasu; Ebisawa, Ken; Eckart, Megan E.; Enoto, Teruaki; Ezoe, Yuichiro; Fabian, Andrew C.; Ferrigno, Carlo; Foster, Adam R.; Fujimoto, Ryuichi; Fukazawa, Yasushi; Furuzawa, Akihiro; Galeazzi, Massimiliano; Gallo, Luigi C.; Gandhi, Poshak; Giustini, Margherita; Goldwurm, Andrea; Gu, Liyi; Guainazzi, Matteo; Haba, Yoshito; Hagino, Kouichi; Hamaguchi, Kenji; Harrus, Ilana M.; Hatsukade, Isamu; Hayashi, Katsuhiro; Hayashi, Takayuki; Hayashida, Kiyoshi; Hiraga, Junko S.; Hornschemeier, Ann; Hoshino, Akio; Hughes, John P.; Ichinohe, Yuto; Iizuka, Ryo; Inoue, Hajime; Inoue, Yoshiyuki; Ishida, Manabu; Ishikawa, Kumi; Ishisaki, Yoshitaka; Iwai, Masachika; Kaastra, Jelle; Kallman, Tim; Kamae, Tsuneyoshi; Kataoka, Jun; Katsuda, Satoru; Kawai, Nobuyuki; Kelley, Richard L.; Kilbourne, Caroline A.; Kitaguchi, Takao; Kitamoto, Shunji; Kitayama, Tetsu; Kohmura, Takayoshi; Kokubun, Motohide; Koyama, Katsuji; Koyama, Shu; Kretschmar, Peter; Krimm, Hans A.; Kubota, Aya; Kunieda, Hideyo; Laurent, Philippe; Lee, Shiu Hang; Leutenegger, Maurice A.; Limousin, Olivier O.; Loewenstein, Michael; Long, Knox S.; Lumb, David; Madejski, Greg; Maeda, Yoshitomo; Maier, Daniel; Makishima, Kazuo; Markevitch, Maxim; Matsumoto, Hironori; Matsushita, Kyoko; Mccammon, Dan; Mcnamara, Brian R.; Mehdipour, Missagh; Miller, Eric D.; Miller, Jon M.; Mineshige, Shin; Mitsuda, Kazuhisa; Mitsuishi, Ikuyuki; Miyazawa, Takuya; Mizuno, Tsunefumi; Mori, Hideyuki; Mori, Koji; Mukai, Koji; Murakami, Hiroshi; Mushotzky, Richard F.; Nakagawa, Takao; Nakajima, Hiroshi; Nakamori, Takeshi; Nakashima, Shinya; Nakazawa, Kazuhiro; Nobukawa, Kumiko K.; Nobukawa, Masayoshi; Noda, Hirofumi; Odaka, Hirokazu; Ohashi, Takaya; Ohno, Masanori; Okajima, Takashi; Ota, Naomi; Ozaki, Masanobu; Paerels, Frits; Paltani, Stéphane; Petre, Robert; Pinto, Ciro; Porter, Frederick S.; Pottschmidt, Katja; Reynolds, Christopher S.; Safi-Harb, Samar; Saito, Shinya; Sakai, Kazuhiro; Sasaki, Toru; Sato, Goro; Sato, Kosuke; Sato, Rie; Sawada, Makoto; Schartel, Norbert; Serlemtsos, Peter J.; Seta, Hiromi; Shidatsu, Megumi; Simionescu, Aurora; Smith, Randall K.; Soong, Yang; Stawarz, Łukasz; Sugawara, Yasuharu; Sugita, Satoshi; Szymkowiak, Andrew; Tajima, Hiroyasu; Takahashi, Hiromitsu; Takahashi, Tadayuki; Takeda, Shiníchiro; Takei, Yoh; Tamagawa, Toru; Tamura, Takayuki; Tanaka, Takaaki; Tanaka, Yasuo; Tanaka, Yasuyuki T.; Tashiro, Makoto S.; Tawara, Yuzuru; Terada, Yukikatsu; Terashima, Yuichi; Tombesi, Francesco; Tomida, Hiroshi; Tsuboi, Yohko; Tsujimoto, Masahiro; Tsunemi, Hiroshi; Suru, Takeshi Got; Uchida, Hiroyuki; Uchiyama, Hideki; Uchiyama, Yasunobu; Ueda, Shutaro; Ueda, Yoshihiro; Uno, Shiníchiro; Urry, C. Megan; Ursino, Eugenio; Watanabe, Shin; Werner, Norbert; Wilkins, Dan R.; Williams, Brian J.; Yamada, Shinya; Yamaguchi, Hiroya; Yamaoka, Kazutaka; Yamasaki, Noriko Y.; Yamauchi, Makoto; Yamauchi, Shigeo; Yaqoob, Tahir; Yatsu, Yoichi; Yonetoku, Daisuke; Zhuravleva, Irina; Zoghbi, Abderahmen; Nakaniwa, Nozomi.

    In: Publications of the Astronomical Society of Japan, Vol. 70, No. 2, psx154, 01.03.2018.

    Research output: Contribution to journalArticle

    Alle, SW, Aharonian, F, Akamatsu, H, Akimoto, F, Allen, SW, 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, JW, Done, C, Dotani, T, Ebisawa, K, Eckart, ME, Enoto, T, Ezoe, Y, Fabian, AC, Ferrigno, C, Foster, AR, Fujimoto, R, Fukazawa, Y, Furuzawa, A, Galeazzi, M, Gallo, LC, Gandhi, P, Giustini, M, Goldwurm, A, Gu, L, 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, RF, Nakagawa, T, Nakajima, H, Nakamori, T, Nakashima, S, Nakazawa, K, Nobukawa, KK, Nobukawa, M, Noda, H, Odaka, H, Ohashi, T, Ohno, M, Okajima, T, Ota, N, Ozaki, M, Paerels, F, Paltani, S, Petre, R, Pinto, C, Porter, FS, Pottschmidt, K, Reynolds, CS, Safi-Harb, S, Saito, S, Sakai, K, Sasaki, T, Sato, G, Sato, K, Sato, R, Sawada, M, Schartel, N, Serlemtsos, PJ, Seta, H, Shidatsu, M, Simionescu, A, Smith, RK, Soong, Y, Stawarz, Ł, 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, Suru, TG, Uchida, H, Uchiyama, H, Uchiyama, Y, Ueda, S, Ueda, Y, Uno, S, Urry, CM, Ursino, E, Watanabe, S, Werner, N, 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 & Nakaniwa, N 2018, 'Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi', Publications of the Astronomical Society of Japan, vol. 70, no. 2, psx154. https://doi.org/10.1093/pasj/psx154
    Alle SW, Aharonian F, Akamatsu H, Akimoto F, Allen SW, Angelini L et al. Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi. Publications of the Astronomical Society of Japan. 2018 Mar 1;70(2). psx154. https://doi.org/10.1093/pasj/psx154
    Alle, Steven W. ; Aharonian, Felix ; Akamatsu, Hiroki ; Akimoto, Fumie ; Allen, Steven W. ; Angelini, Lorella ; Audard, Marc ; Awaki, Hisamitsu ; Axelsson, Magnus ; Bamba, Aya ; Bautz, Marshall W. ; Blandford, Roger ; Brenneman, Laura W. ; Brown, Gregory V. ; Bulbul, Esra ; Cackett, Edward M. ; Chernyakova, Maria ; Chiao, Meng P. ; Coppi, Paolo S. ; Costantini, Elisa ; De Plaa, Jelle ; De Vries, Cor P. ; Den Herder, Jan Willem ; Done, Chris ; Dotani, Tadayasu ; Ebisawa, Ken ; Eckart, Megan E. ; Enoto, Teruaki ; Ezoe, Yuichiro ; Fabian, Andrew C. ; Ferrigno, Carlo ; Foster, Adam R. ; Fujimoto, Ryuichi ; Fukazawa, Yasushi ; Furuzawa, Akihiro ; Galeazzi, Massimiliano ; Gallo, Luigi C. ; Gandhi, Poshak ; Giustini, Margherita ; Goldwurm, Andrea ; Gu, Liyi ; Guainazzi, Matteo ; Haba, Yoshito ; Hagino, Kouichi ; Hamaguchi, Kenji ; Harrus, Ilana M. ; Hatsukade, Isamu ; Hayashi, Katsuhiro ; Hayashi, Takayuki ; Hayashida, Kiyoshi ; Hiraga, Junko S. ; Hornschemeier, Ann ; Hoshino, Akio ; Hughes, John P. ; Ichinohe, Yuto ; Iizuka, Ryo ; Inoue, Hajime ; Inoue, Yoshiyuki ; Ishida, Manabu ; Ishikawa, Kumi ; Ishisaki, Yoshitaka ; Iwai, Masachika ; Kaastra, Jelle ; Kallman, Tim ; Kamae, Tsuneyoshi ; Kataoka, Jun ; Katsuda, Satoru ; Kawai, Nobuyuki ; Kelley, Richard L. ; Kilbourne, Caroline A. ; Kitaguchi, Takao ; Kitamoto, Shunji ; Kitayama, Tetsu ; Kohmura, Takayoshi ; Kokubun, Motohide ; Koyama, Katsuji ; Koyama, Shu ; Kretschmar, Peter ; Krimm, Hans A. ; Kubota, Aya ; Kunieda, Hideyo ; Laurent, Philippe ; Lee, Shiu Hang ; Leutenegger, Maurice A. ; Limousin, Olivier O. ; Loewenstein, Michael ; Long, Knox S. ; Lumb, David ; Madejski, Greg ; Maeda, Yoshitomo ; Maier, Daniel ; Makishima, Kazuo ; Markevitch, Maxim ; Matsumoto, Hironori ; Matsushita, Kyoko ; Mccammon, Dan ; Mcnamara, Brian R. ; Mehdipour, Missagh ; Miller, Eric D. ; Miller, Jon M. ; Mineshige, Shin ; Mitsuda, Kazuhisa ; Mitsuishi, Ikuyuki ; Miyazawa, Takuya ; Mizuno, Tsunefumi ; Mori, Hideyuki ; Mori, Koji ; Mukai, Koji ; Murakami, Hiroshi ; Mushotzky, Richard F. ; Nakagawa, Takao ; Nakajima, Hiroshi ; Nakamori, Takeshi ; Nakashima, Shinya ; Nakazawa, Kazuhiro ; Nobukawa, Kumiko K. ; Nobukawa, Masayoshi ; Noda, Hirofumi ; Odaka, Hirokazu ; Ohashi, Takaya ; Ohno, Masanori ; Okajima, Takashi ; Ota, Naomi ; Ozaki, Masanobu ; Paerels, Frits ; Paltani, Stéphane ; Petre, Robert ; Pinto, Ciro ; Porter, Frederick S. ; Pottschmidt, Katja ; Reynolds, Christopher S. ; Safi-Harb, Samar ; Saito, Shinya ; Sakai, Kazuhiro ; Sasaki, Toru ; Sato, Goro ; Sato, Kosuke ; Sato, Rie ; Sawada, Makoto ; Schartel, Norbert ; Serlemtsos, Peter J. ; Seta, Hiromi ; Shidatsu, Megumi ; Simionescu, Aurora ; Smith, Randall K. ; Soong, Yang ; Stawarz, Łukasz ; Sugawara, Yasuharu ; Sugita, Satoshi ; Szymkowiak, Andrew ; Tajima, Hiroyasu ; Takahashi, Hiromitsu ; Takahashi, Tadayuki ; Takeda, Shiníchiro ; Takei, Yoh ; Tamagawa, Toru ; Tamura, Takayuki ; Tanaka, Takaaki ; Tanaka, Yasuo ; Tanaka, Yasuyuki T. ; Tashiro, Makoto S. ; Tawara, Yuzuru ; Terada, Yukikatsu ; Terashima, Yuichi ; Tombesi, Francesco ; Tomida, Hiroshi ; Tsuboi, Yohko ; Tsujimoto, Masahiro ; Tsunemi, Hiroshi ; Suru, Takeshi Got ; Uchida, Hiroyuki ; Uchiyama, Hideki ; Uchiyama, Yasunobu ; Ueda, Shutaro ; Ueda, Yoshihiro ; Uno, Shiníchiro ; Urry, C. Megan ; Ursino, Eugenio ; Watanabe, Shin ; Werner, Norbert ; Wilkins, Dan R. ; Williams, Brian J. ; Yamada, Shinya ; Yamaguchi, Hiroya ; Yamaoka, Kazutaka ; Yamasaki, Noriko Y. ; Yamauchi, Makoto ; Yamauchi, Shigeo ; Yaqoob, Tahir ; Yatsu, Yoichi ; Yonetoku, Daisuke ; Zhuravleva, Irina ; Zoghbi, Abderahmen ; Nakaniwa, Nozomi. / Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi. In: Publications of the Astronomical Society of Japan. 2018 ; Vol. 70, No. 2.
    @article{5f51819ef19f44fca4b7ab30bce0f993,
    title = "Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi",
    abstract = "We report on a Hitomi observation of IGRJ16318-4848, a high-mass X-ray binary system with an extremely strong absorption of NH ∼ 1024cm 2. Previous X-ray studies revealed that its spectrum is dominated by strong fluorescence lines of Fe as well as continuum emission lines. For physical and geometrical insight into the nature of the reprocessing material, we utilized the high spectroscopic resolving power of the X-ray microcalorimeter (the soft X-ray spectrometer: SXS) and the wide-band sensitivity by the soft and hard X-ray imagers (SXI and HXI) aboard Hitomi. Even though the photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1 and Kα2 lines and puts strong constraints on the line centroid and line width. The line width corresponds to a velocity of 160+-37000 km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from the any X-ray binary, much less than the Doppler broadening and Doppler shift expected from speeds that are characteristic of similar systems. Combined with the K-shell edge energy measured by the SXI and HXI spectra, the ionization state of Fe is estimated to be in the range of Fe I-IV. Considering the estimated ionization parameter and the distance between the X-ray source and the absorber, the density and thickness of the materials are estimated. The extraordinarily strong absorption and the absence of a Compton shoulder component have been confirmed. These characteristics suggest reprocessing materials that are distributed in a narrow solid angle or scattering, primarily by warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. It provides strong motivation for follow-up observations of this and other X-ray binaries using the X-ray Astrophysics Recovery Mission and other comparable future instruments.",
    keywords = "Binaries: general, Stars: individual (IGR J16318-4848), X-rays: binaries",
    author = "Alle, {Steven W.} and Felix Aharonian and Hiroki Akamatsu and Fumie Akimoto and Allen, {Steven W.} and Lorella Angelini and Marc Audard and Hisamitsu Awaki and Magnus Axelsson and Aya Bamba and Bautz, {Marshall W.} and Roger Blandford and Brenneman, {Laura W.} and Brown, {Gregory V.} and Esra Bulbul and Cackett, {Edward M.} and Maria Chernyakova and Chiao, {Meng P.} and Coppi, {Paolo S.} and Elisa Costantini and {De Plaa}, Jelle and {De Vries}, {Cor P.} and {Den Herder}, {Jan Willem} and Chris Done and Tadayasu Dotani and Ken Ebisawa and Eckart, {Megan E.} and Teruaki Enoto and Yuichiro Ezoe and Fabian, {Andrew C.} and Carlo Ferrigno and Foster, {Adam R.} and Ryuichi Fujimoto and Yasushi Fukazawa and Akihiro Furuzawa and Massimiliano Galeazzi and Gallo, {Luigi C.} and Poshak Gandhi and Margherita Giustini and Andrea Goldwurm and Liyi Gu and Matteo Guainazzi and Yoshito Haba and Kouichi Hagino and Kenji Hamaguchi and Harrus, {Ilana M.} and Isamu Hatsukade and Katsuhiro Hayashi and Takayuki Hayashi and Kiyoshi Hayashida and Hiraga, {Junko S.} and Ann Hornschemeier and Akio Hoshino and Hughes, {John P.} and Yuto Ichinohe and Ryo Iizuka and Hajime Inoue and Yoshiyuki Inoue and Manabu Ishida and Kumi Ishikawa and Yoshitaka Ishisaki and Masachika Iwai and Jelle Kaastra and Tim Kallman and Tsuneyoshi Kamae and Jun Kataoka and Satoru Katsuda and Nobuyuki Kawai and Kelley, {Richard L.} and Kilbourne, {Caroline A.} and Takao Kitaguchi and Shunji Kitamoto and Tetsu Kitayama and Takayoshi Kohmura and Motohide Kokubun and Katsuji Koyama and Shu Koyama and Peter Kretschmar and Krimm, {Hans A.} and Aya Kubota and Hideyo Kunieda and Philippe Laurent and Lee, {Shiu Hang} and Leutenegger, {Maurice A.} and Limousin, {Olivier O.} and Michael Loewenstein and Long, {Knox S.} and David Lumb and Greg Madejski and Yoshitomo Maeda and Daniel Maier and Kazuo Makishima and Maxim Markevitch and Hironori Matsumoto and Kyoko Matsushita and Dan Mccammon and Mcnamara, {Brian R.} and Missagh Mehdipour and Miller, {Eric D.} and Miller, {Jon M.} and Shin Mineshige and Kazuhisa Mitsuda and Ikuyuki Mitsuishi and Takuya Miyazawa and Tsunefumi Mizuno and Hideyuki Mori and Koji Mori and Koji Mukai and Hiroshi Murakami and Mushotzky, {Richard F.} and Takao Nakagawa and Hiroshi Nakajima and Takeshi Nakamori and Shinya Nakashima and Kazuhiro Nakazawa and Nobukawa, {Kumiko K.} and Masayoshi Nobukawa and Hirofumi Noda and Hirokazu Odaka and Takaya Ohashi and Masanori Ohno and Takashi Okajima and Naomi Ota and Masanobu Ozaki and Frits Paerels and St{\'e}phane Paltani and Robert Petre and Ciro Pinto and Porter, {Frederick S.} and Katja Pottschmidt and Reynolds, {Christopher S.} and Samar Safi-Harb and Shinya Saito and Kazuhiro Sakai and Toru Sasaki and Goro Sato and Kosuke Sato and Rie Sato and Makoto Sawada and Norbert Schartel and Serlemtsos, {Peter J.} and Hiromi Seta and Megumi Shidatsu and Aurora Simionescu and Smith, {Randall K.} and Yang Soong and Łukasz Stawarz and Yasuharu Sugawara and Satoshi Sugita and Andrew Szymkowiak and Hiroyasu Tajima and Hiromitsu Takahashi and Tadayuki Takahashi and Shin{\'i}chiro Takeda and Yoh Takei and Toru Tamagawa and Takayuki Tamura and Takaaki Tanaka and Yasuo Tanaka and Tanaka, {Yasuyuki T.} and Tashiro, {Makoto S.} and Yuzuru Tawara and Yukikatsu Terada and Yuichi Terashima and Francesco Tombesi and Hiroshi Tomida and Yohko Tsuboi and Masahiro Tsujimoto and Hiroshi Tsunemi and Suru, {Takeshi Got} and Hiroyuki Uchida and Hideki Uchiyama and Yasunobu Uchiyama and Shutaro Ueda and Yoshihiro Ueda and Shin{\'i}chiro Uno and Urry, {C. Megan} and Eugenio Ursino and Shin Watanabe and Norbert Werner and Wilkins, {Dan R.} and Williams, {Brian J.} and Shinya Yamada and Hiroya Yamaguchi and Kazutaka Yamaoka and Yamasaki, {Noriko Y.} and Makoto Yamauchi and Shigeo Yamauchi and Tahir Yaqoob and Yoichi Yatsu and Daisuke Yonetoku and Irina Zhuravleva and Abderahmen Zoghbi and Nozomi Nakaniwa",
    year = "2018",
    month = "3",
    day = "1",
    doi = "10.1093/pasj/psx154",
    language = "English",
    volume = "70",
    journal = "Publication of the Astronomical Society of Japan",
    issn = "0004-6264",
    publisher = "Astronomical Society of Japan",
    number = "2",

    }

    TY - JOUR

    T1 - Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi

    AU - Alle, Steven W.

    AU - Aharonian, Felix

    AU - Akamatsu, Hiroki

    AU - Akimoto, Fumie

    AU - Allen, Steven W.

    AU - Angelini, Lorella

    AU - Audard, Marc

    AU - Awaki, Hisamitsu

    AU - Axelsson, Magnus

    AU - Bamba, Aya

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    PY - 2018/3/1

    Y1 - 2018/3/1

    N2 - We report on a Hitomi observation of IGRJ16318-4848, a high-mass X-ray binary system with an extremely strong absorption of NH ∼ 1024cm 2. Previous X-ray studies revealed that its spectrum is dominated by strong fluorescence lines of Fe as well as continuum emission lines. For physical and geometrical insight into the nature of the reprocessing material, we utilized the high spectroscopic resolving power of the X-ray microcalorimeter (the soft X-ray spectrometer: SXS) and the wide-band sensitivity by the soft and hard X-ray imagers (SXI and HXI) aboard Hitomi. Even though the photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1 and Kα2 lines and puts strong constraints on the line centroid and line width. The line width corresponds to a velocity of 160+-37000 km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from the any X-ray binary, much less than the Doppler broadening and Doppler shift expected from speeds that are characteristic of similar systems. Combined with the K-shell edge energy measured by the SXI and HXI spectra, the ionization state of Fe is estimated to be in the range of Fe I-IV. Considering the estimated ionization parameter and the distance between the X-ray source and the absorber, the density and thickness of the materials are estimated. The extraordinarily strong absorption and the absence of a Compton shoulder component have been confirmed. These characteristics suggest reprocessing materials that are distributed in a narrow solid angle or scattering, primarily by warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. It provides strong motivation for follow-up observations of this and other X-ray binaries using the X-ray Astrophysics Recovery Mission and other comparable future instruments.

    AB - We report on a Hitomi observation of IGRJ16318-4848, a high-mass X-ray binary system with an extremely strong absorption of NH ∼ 1024cm 2. Previous X-ray studies revealed that its spectrum is dominated by strong fluorescence lines of Fe as well as continuum emission lines. For physical and geometrical insight into the nature of the reprocessing material, we utilized the high spectroscopic resolving power of the X-ray microcalorimeter (the soft X-ray spectrometer: SXS) and the wide-band sensitivity by the soft and hard X-ray imagers (SXI and HXI) aboard Hitomi. Even though the photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1 and Kα2 lines and puts strong constraints on the line centroid and line width. The line width corresponds to a velocity of 160+-37000 km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from the any X-ray binary, much less than the Doppler broadening and Doppler shift expected from speeds that are characteristic of similar systems. Combined with the K-shell edge energy measured by the SXI and HXI spectra, the ionization state of Fe is estimated to be in the range of Fe I-IV. Considering the estimated ionization parameter and the distance between the X-ray source and the absorber, the density and thickness of the materials are estimated. The extraordinarily strong absorption and the absence of a Compton shoulder component have been confirmed. These characteristics suggest reprocessing materials that are distributed in a narrow solid angle or scattering, primarily by warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. It provides strong motivation for follow-up observations of this and other X-ray binaries using the X-ray Astrophysics Recovery Mission and other comparable future instruments.

    KW - Binaries: general

    KW - Stars: individual (IGR J16318-4848)

    KW - X-rays: binaries

    UR - http://www.scopus.com/inward/record.url?scp=85058816791&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85058816791&partnerID=8YFLogxK

    U2 - 10.1093/pasj/psx154

    DO - 10.1093/pasj/psx154

    M3 - Article

    AN - SCOPUS:85058816791

    VL - 70

    JO - Publication of the Astronomical Society of Japan

    JF - Publication of the Astronomical Society of Japan

    SN - 0004-6264

    IS - 2

    M1 - psx154

    ER -