Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9

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 Costantini, Jelle De PlaaCor 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 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, Lukasz 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, Yasuyuki T. Tanaka, Makoto S. 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, 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, Toshiki Sato, Nozomu Nakaniwa, Hiroaki Murakami, Benson Guest

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5-0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager, and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the PWN itself, we find that the Hitomi spectra can be fitted with a broken power law with photon indices of 1 = 1.74 ± 0.02 and 2 = 2.14 ± 0.01 below and above the break at 7.1 ± 0.3 keV, which is significantly lower than the NuSTAR result (∼9.0 keV). The spectral break cannot be reproduced by time-dependent particle injection one-zone spectral energy distribution models, which strongly indicates that a more complex emission model is needed, as suggested by recent theoretical models. We also search for narrow emission or absorption lines with the SXS, and perform a timing analysis of PSR J1833-1034 with the HXI and the Soft Gamma-ray Detector. No significant pulsation is found from the pulsar. However, unexpectedly, narrow absorption line features are detected in the SXS data at 4.2345 keV and 9.296 keV with a significance of 3.65 s. While the origin of these features is not understood, their mere detection opens up a new field of research and was only possible with the high resolution, sensitivity, and ability to measure extended sources provided by an X-ray microcalorimeter.

Original languageEnglish (US)
Article number027
JournalPublications of the Astronomical Society of Japan
Volume70
Issue number3
DOIs
StatePublished - Jun 1 2018

Fingerprint

nebulae
pulsars
x rays
spectrometer
spectrometers
supernova remnants
spectral energy distribution
calorimeters
power law
time measurement
gamma rays
injection
continuums
composite materials
sensitivity
high resolution
detectors
photons

Keywords

  • ISM: individual objects(G21.5-0.9)
  • ISM: supernovaremnants
  • pulsars: individual(PSR J1833-1034)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Aharonian, F., Akamatsu, H., Akimoto, F., Allen, S. W., Angelini, L., Audard, M., ... Guest, B. (2018). Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9. Publications of the Astronomical Society of Japan, 70(3), [027]. https://doi.org/10.1093/pasj/psy027

Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9. / 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; 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, Lukasz; Sugawara, Yasuharu; Sugita, Satoshi; Szymkowiak, Andrew; Tajima, Hiroyasu; Takahashi, Hiromitsu; Takahashi, Tadayuki; Takeda, Shin'Ichiro; 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, Shin'Ichiro; Megan Urry, C.; 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; Sato, Toshiki; Nakaniwa, Nozomu; Murakami, Hiroaki; Guest, Benson.

In: Publications of the Astronomical Society of Japan, Vol. 70, No. 3, 027, 01.06.2018.

Research output: Contribution to journalArticle

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, O, 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, L, Sugawara, Y, Sugita, S, Szymkowiak, A, Tajima, H, Takahashi, H, Takahashi, T, Takeda, SI, 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, SI, Megan Urry, C, 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, Sato, T, Nakaniwa, N, Murakami, H & Guest, B 2018, 'Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9', Publications of the Astronomical Society of Japan, vol. 70, no. 3, 027. https://doi.org/10.1093/pasj/psy027
Aharonian F, Akamatsu H, Akimoto F, Allen SW, Angelini L, Audard M et al. Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9. Publications of the Astronomical Society of Japan. 2018 Jun 1;70(3). 027. https://doi.org/10.1093/pasj/psy027
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 ; 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, Lukasz ; Sugawara, Yasuharu ; Sugita, Satoshi ; Szymkowiak, Andrew ; Tajima, Hiroyasu ; Takahashi, Hiromitsu ; Takahashi, Tadayuki ; Takeda, Shin'Ichiro ; 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, Shin'Ichiro ; Megan Urry, C. ; 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 ; Sato, Toshiki ; Nakaniwa, Nozomu ; Murakami, Hiroaki ; Guest, Benson. / Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9. In: Publications of the Astronomical Society of Japan. 2018 ; Vol. 70, No. 3.
@article{a7ae3b94c91d412f9b724ee41121ffe5,
title = "Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9",
abstract = "We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5-0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager, and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the PWN itself, we find that the Hitomi spectra can be fitted with a broken power law with photon indices of 1 = 1.74 ± 0.02 and 2 = 2.14 ± 0.01 below and above the break at 7.1 ± 0.3 keV, which is significantly lower than the NuSTAR result (∼9.0 keV). The spectral break cannot be reproduced by time-dependent particle injection one-zone spectral energy distribution models, which strongly indicates that a more complex emission model is needed, as suggested by recent theoretical models. We also search for narrow emission or absorption lines with the SXS, and perform a timing analysis of PSR J1833-1034 with the HXI and the Soft Gamma-ray Detector. No significant pulsation is found from the pulsar. However, unexpectedly, narrow absorption line features are detected in the SXS data at 4.2345 keV and 9.296 keV with a significance of 3.65 s. While the origin of these features is not understood, their mere detection opens up a new field of research and was only possible with the high resolution, sensitivity, and ability to measure extended sources provided by an X-ray microcalorimeter.",
keywords = "ISM: individual objects(G21.5-0.9), ISM: supernovaremnants, pulsars: individual(PSR J1833-1034)",
author = "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 Olivier Limousin 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 Lukasz Stawarz and Yasuharu Sugawara and Satoshi Sugita and Andrew Szymkowiak and Hiroyasu Tajima and Hiromitsu Takahashi and Tadayuki Takahashi and Shin'Ichiro 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 Tsuru, {Takeshi Go} and Hiroyuki Uchida and Hideki Uchiyama and Yasunobu Uchiyama and Shutaro Ueda and Yoshihiro Ueda and Shin'Ichiro Uno and {Megan Urry}, C. 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 Toshiki Sato and Nozomu Nakaniwa and Hiroaki Murakami and Benson Guest",
year = "2018",
month = "6",
day = "1",
doi = "10.1093/pasj/psy027",
language = "English (US)",
volume = "70",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
publisher = "Astronomical Society of Japan",
number = "3",

}

TY - JOUR

T1 - Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9

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 - Den Herder, Jan Willem

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

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AU - Ishikawa, Kumi

AU - Ishisaki, Yoshitaka

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AU - Tsujimoto, Masahiro

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AU - Tsuru, Takeshi Go

AU - Uchida, Hiroyuki

AU - Uchiyama, Hideki

AU - Uchiyama, Yasunobu

AU - Ueda, Shutaro

AU - Ueda, Yoshihiro

AU - Uno, Shin'Ichiro

AU - Megan Urry, C.

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 - Sato, Toshiki

AU - Nakaniwa, Nozomu

AU - Murakami, Hiroaki

AU - Guest, Benson

PY - 2018/6/1

Y1 - 2018/6/1

N2 - We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5-0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager, and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the PWN itself, we find that the Hitomi spectra can be fitted with a broken power law with photon indices of 1 = 1.74 ± 0.02 and 2 = 2.14 ± 0.01 below and above the break at 7.1 ± 0.3 keV, which is significantly lower than the NuSTAR result (∼9.0 keV). The spectral break cannot be reproduced by time-dependent particle injection one-zone spectral energy distribution models, which strongly indicates that a more complex emission model is needed, as suggested by recent theoretical models. We also search for narrow emission or absorption lines with the SXS, and perform a timing analysis of PSR J1833-1034 with the HXI and the Soft Gamma-ray Detector. No significant pulsation is found from the pulsar. However, unexpectedly, narrow absorption line features are detected in the SXS data at 4.2345 keV and 9.296 keV with a significance of 3.65 s. While the origin of these features is not understood, their mere detection opens up a new field of research and was only possible with the high resolution, sensitivity, and ability to measure extended sources provided by an X-ray microcalorimeter.

AB - We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.5-0.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution. The X-ray spectra in the 0.8-80 keV range obtained with the Soft X-ray Spectrometer (SXS), Soft X-ray Imager, and Hard X-ray Imager (HXI) show a significant break in the continuum as previously found with the NuSTAR observation. After taking into account all known emissions from the SNR other than the PWN itself, we find that the Hitomi spectra can be fitted with a broken power law with photon indices of 1 = 1.74 ± 0.02 and 2 = 2.14 ± 0.01 below and above the break at 7.1 ± 0.3 keV, which is significantly lower than the NuSTAR result (∼9.0 keV). The spectral break cannot be reproduced by time-dependent particle injection one-zone spectral energy distribution models, which strongly indicates that a more complex emission model is needed, as suggested by recent theoretical models. We also search for narrow emission or absorption lines with the SXS, and perform a timing analysis of PSR J1833-1034 with the HXI and the Soft Gamma-ray Detector. No significant pulsation is found from the pulsar. However, unexpectedly, narrow absorption line features are detected in the SXS data at 4.2345 keV and 9.296 keV with a significance of 3.65 s. While the origin of these features is not understood, their mere detection opens up a new field of research and was only possible with the high resolution, sensitivity, and ability to measure extended sources provided by an X-ray microcalorimeter.

KW - ISM: individual objects(G21.5-0.9)

KW - ISM: supernovaremnants

KW - pulsars: individual(PSR J1833-1034)

UR - http://www.scopus.com/inward/record.url?scp=85051066636&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85051066636&partnerID=8YFLogxK

U2 - 10.1093/pasj/psy027

DO - 10.1093/pasj/psy027

M3 - Article

AN - SCOPUS:85051066636

VL - 70

JO - Publication of the Astronomical Society of Japan

JF - Publication of the Astronomical Society of Japan

SN - 0004-6264

IS - 3

M1 - 027

ER -