Abstract
We report a Hitomi observation of IGR J16318-4848, 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. For physical and geometrical insight into the nature of the reprocessing material, we utilize 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 imager (SXI and HXI) aboard Hitomi. Even though photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1and Kα2lines and puts strong constraints on the line centroid and width. The line width corresponds to the velocity of 160+300-70km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from any X-ray binary, much less than the Doppler broadening and shift expected from speeds which 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 is confirmed. These characteristics suggest reprocessing materials which are distributed in a narrow solid angle or scattering primarily with warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. This 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 language | English |
|---|---|
| Journal | Unknown Journal |
| Publication status | Published - 2017 Nov 21 |
Keywords
- Binaries: general
- Stars: individual:IGR J16318-4848
- X-rays: binaries
ASJC Scopus subject areas
- General
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Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi. / 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.; Herder, Jan Willem Den; 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; Páltani, Stephane; 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, Lukasz; 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; Tsuru, Takeshi Go; 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: Unknown Journal, 21.11.2017.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi
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
AU - Bautz, Marshall W.
AU - Blandford, Roger
AU - Brenneman, Laura W.
AU - Brown, Gregory V.
AU - Bulbul, Esra
AU - Cackett, Edward M.
AU - Chernyakova, Maria
AU - Chiao, Meng P.
AU - Coppi, Paolo S.
AU - Costantini, Elisa
AU - De Plaa, Jelle
AU - De Vries, Cor P.
AU - Herder, Jan Willem Den
AU - Done, Chris
AU - Dotani, Tadayasu
AU - Ebisawa, Ken
AU - Eckart, Megan E.
AU - Enoto, Teruaki
AU - Ezoe, Yuichiro
AU - Fabian, Andrew C.
AU - Ferrigno, Carlo
AU - Foster, Adam R.
AU - Fujimoto, Ryuichi
AU - Fukazawa, Yasushi
AU - Furuzawa, Akihiro
AU - Galeazzi, Massimiliano
AU - Gallo, Luigi C.
AU - Gandhi, Poshak
AU - Giustini, Margherita
AU - Goldwurm, Andrea
AU - Gu, Liyi
AU - Guainazzi, Matteo
AU - Haba, Yoshito
AU - Hagino, Kouichi
AU - Hamaguchi, Kenji
AU - Harrus, Ilana M.
AU - Hatsukade, Isamu
AU - Hayashi, Katsuhiro
AU - Hayashi, Takayuki
AU - Hayashida, Kiyoshi
AU - Hiraga, Junko S.
AU - Hornschemeier, Ann
AU - Hoshino, Akio
AU - Hughes, John P.
AU - Ichinohe, Yuto
AU - Iizuka, Ryo
AU - Inoue, Hajime
AU - Inoue, Yoshiyuki
AU - Ishida, Manabu
AU - Ishikawa, Kumi
AU - Ishisaki, Yoshitaka
AU - Iwai, Masachika
AU - Kaastra, Jelle
AU - Kallman, Tim
AU - Kamae, Tsuneyoshi
AU - Kataoka, Jun
AU - Katsuda, Satoru
AU - Kawai, Nobuyuki
AU - Kelley, Richard L.
AU - Kilbourne, Caroline A.
AU - Kitaguchi, Takao
AU - Kitamoto, Shunji
AU - Kitayama, Tetsu
AU - Kohmura, Takayoshi
AU - Kokubun, Motohide
AU - Koyama, Katsuji
AU - Koyama, Shu
AU - Kretschmar, Peter
AU - Krimm, Hans A.
AU - Kubota, Aya
AU - Kunieda, Hideyo
AU - Laurent, Philippe
AU - Lee, Shiu Hang
AU - Leutenegger, Maurice A.
AU - Limousin, Olivier O.
AU - Loewenstein, Michael
AU - Long, Knox S.
AU - Lumb, David
AU - Madejski, Greg
AU - Maeda, Yoshitomo
AU - Maier, Daniel
AU - Makishima, Kazuo
AU - Markevitch, Maxim
AU - Matsumoto, Hironori
AU - Matsushita, Kyoko
AU - Mccammon, Dan
AU - Mcnamara, Brian R.
AU - Mehdipour, Missagh
AU - Miller, Eric D.
AU - Miller, Jon M.
AU - Mineshige, Shin
AU - Mitsuda, Kazuhisa
AU - Mitsuishi, Ikuyuki
AU - Miyazawa, Takuya
AU - Mizuno, Tsunefumi
AU - Mori, Hideyuki
AU - Mori, Koji
AU - Mukai, Koji
AU - Murakami, Hiroshi
AU - Mushotzky, Richard F.
AU - Nakagawa, Takao
AU - Nakajima, Hiroshi
AU - Nakamori, Takeshi
AU - Nakashima, Shinya
AU - Nakazawa, Kazuhiro
AU - Nobukawa, Kumiko K.
AU - Nobukawa, Masayoshi
AU - Noda, Hirofumi
AU - Odaka, Hirokazu
AU - Ohashi, Takaya
AU - Ohno, Masanori
AU - Okajima, Takashi
AU - Ota, Naomi
AU - Ozaki, Masanobu
AU - Paerels, Frits
AU - Páltani, Stephane
AU - Petre, Robert
AU - Pinto, Ciro
AU - Porter, Frederick S.
AU - Pottschmidt, Katja
AU - Reynolds, Christopher S.
AU - Safi-Harb, Samar
AU - Saito, Shinya
AU - Sakai, Kazuhiro
AU - Sasaki, Toru
AU - Sato, Goro
AU - Sato, Kosuke
AU - Sato, Rie
AU - Sawada, Makoto
AU - Schartel, Norbert
AU - Serlemtsos, Peter J.
AU - Seta, Hiromi
AU - Shidatsu, Megumi
AU - Simionescu, Aurora
AU - Smith, Randall K.
AU - Soong, Yang
AU - Stawarz, Lukasz
AU - Sugawara, Yasuharu
AU - Sugita, Satoshi
AU - Szymkowiak, Andrew
AU - Tajima, Hiroyasu
AU - Takahashi, Hiromitsu
AU - Takahashi, Tadayuki
AU - Takeda, Shiníchiro
AU - Takei, Yoh
AU - Tamagawa, Toru
AU - Tamura, Takayuki
AU - Tanaka, Takaaki
AU - Tanaka, Yasuo
AU - Tanaka, Yasuyuki T.
AU - Tashiro, Makoto S.
AU - Tawara, Yuzuru
AU - Terada, Yukikatsu
AU - Terashima, Yuichi
AU - Tombesi, Francesco
AU - Tomida, Hiroshi
AU - Tsuboi, Yohko
AU - Tsujimoto, Masahiro
AU - Tsunemi, Hiroshi
AU - Tsuru, Takeshi Go
AU - Uchida, Hiroyuki
AU - Uchiyama, Hideki
AU - Uchiyama, Yasunobu
AU - Ueda, Shutaro
AU - Ueda, Yoshihiro
AU - Uno, Shiníchiro
AU - Urry, C. Megan
AU - Ursino, Eugenio
AU - Watanabe, Shin
AU - Werner, Norbert
AU - Wilkins, Dan R.
AU - Williams, Brian J.
AU - Yamada, Shinya
AU - Yamaguchi, Hiroya
AU - Yamaoka, Kazutaka
AU - Yamasaki, Noriko Y.
AU - Yamauchi, Makoto
AU - Yamauchi, Shigeo
AU - Yaqoob, Tahir
AU - Yatsu, Yoichi
AU - Yonetoku, Daisuke
AU - Zhuravleva, Irina
AU - Zoghbi, Abderahmen
AU - Nakaniwa, Nozomi
N1 - Publisher Copyright: Copyright © 2017, The Authors. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017/11/21
Y1 - 2017/11/21
N2 - We report a Hitomi observation of IGR J16318-4848, 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. For physical and geometrical insight into the nature of the reprocessing material, we utilize 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 imager (SXI and HXI) aboard Hitomi. Even though photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1and Kα2lines and puts strong constraints on the line centroid and width. The line width corresponds to the velocity of 160+300-70km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from any X-ray binary, much less than the Doppler broadening and shift expected from speeds which 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 is confirmed. These characteristics suggest reprocessing materials which are distributed in a narrow solid angle or scattering primarily with warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. This 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 a Hitomi observation of IGR J16318-4848, 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. For physical and geometrical insight into the nature of the reprocessing material, we utilize 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 imager (SXI and HXI) aboard Hitomi. Even though photon counts are limited due to unintended off-axis pointing, the SXS spectrum resolves Fe Kα1and Kα2lines and puts strong constraints on the line centroid and width. The line width corresponds to the velocity of 160+300-70km s-1. This represents the most accurate, and smallest, width measurement of this line made so far from any X-ray binary, much less than the Doppler broadening and shift expected from speeds which 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 is confirmed. These characteristics suggest reprocessing materials which are distributed in a narrow solid angle or scattering primarily with warm free electrons or neutral hydrogen. This measurement was achieved using the SXS detection of 19 photons. This 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=85095352729&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85095352729&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85095352729
JO - Unknown Journal
JF - Unknown Journal
ER -