Papers - TANAKA Takaaki
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Rapid Deceleration of Blast Waves Witnessed in Tycho’s Supernova Remnant Reviewed
T. Tanaka, T. Okuno, H. Uchida, H. Yamaguchi, S. H. Lee, K. Maeda, B. J. Williams
The Astrophysical Journal Letters 906 ( 1 ) L3 2021
Joint Work
Authorship：Lead author, Corresponding author
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Soft X-ray Imager aboard Hitomi (ASTRO-H) Reviewed
T. Tanaka, H. Uchida, H. Nakajima, H. Tsunemi, K. Hayashida, T. G. Tsuru, T. Dotani, R. Nagino, S. Inoue, S. Katada, R. Washino, M. Ozaki, H. Tomida, C. Natsukari, S. Ueda, M. Iwai, K. Mori, M. Yamauchi, I. Hatsukade, Y. Nishioka, E. Isoda, M. Nobukawa, J. S. Hiraga, T. Kohmura, H. Murakami, K. K. Nobukawa, A. Bamba, J. P. Doty
Journal of Astronomical Telescopes, Instruments, and Systems 4 ( 1 ) 011211 2018
Joint Work
Authorship：Lead author, Corresponding author
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NuSTAR Detection of Nonthermal Bremsstrahlung from the Supernova Remnant W49B Reviewed
T. Tanaka, H. Yamaguchi, D. R. Wik, F. A. Aharonian, A. Bamba, D. Castro, A. R. Foster, R. Petre, J. Rho, R. K. Smith, H. Uchida, Y. Uchiyama, B. J. Williams
The Astrophysical Journal Letters 866 ( 2 ) L26 2018
Joint Work
Authorship：Lead author, Corresponding author
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Detection of the Characteristic Pion-Decay Signature in Supernova Remnants Reviewed
M. Ackermann, et al. (including T. Tanaka as a corresponding author)
Science 339 ( 6121 ) 807 - 811 2013
Joint Work
Authorship：Corresponding author
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Gamma-Ray Emission from the Shell of Supernova Remnant W44 Revealed by the Fermi LAT Reviewed
A. A. Abdo, et al. (including T. Tanaka as a corresponding author),
Science 327 ( 5969 ) 1103 - 1106 2010
Joint Work
Authorship：Corresponding author
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XRISM Reveals Low Nonthermal Pressure in the Core of the Hot, Relaxed Galaxy Cluster A2029 Reviewed
XRISM Collaboration (including T. Tanaka)
The Astrophysical Journal Letters 982 ( 1 ) L5 2025.3
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Soft X-ray Imager of the Xtend system on board XRISM Reviewed
K. Noda, et al. (including T. Tanaka as a corresponding author)
Publications of the Astronomical Society of Japan 2025.3
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A detailed study on spectroscopic performance of SOI pixel detector with a pinned depleted diode structure for X-ray astronomy Reviewed
M. Yukumoto, K. Mori, A. Takeda, Y. Nishioka, M. Kimura, Y. Fuchita, T. Yoshida, T. G. Tsuru, I. Kurachi, K. Hagino, Y. Arai, T. Kohmura, T. Tanaka, K. K. Nobukawa
Nuclear Instruments and Methods in Physics Research A 1072 170203 2025.3
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The bulk motion of gas in the core of the Centaurus galaxy cluster Reviewed International coauthorship
XRISM Collaboration (including T. Tanaka)
Nature 638 ( 8050 ) 365 - 369 2025.2
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Detection of Extended X-Ray Emission around the PeVatron Microquasar V4641 Sgr with XRISM
Hiromasa Suzuki, Naomi Tsuji, Yoshiaki Kanemaru, Megumi Shidatsu, Laura Olivera-Nieto, Samar Safi-Harb, Shigeo S. Kimura, Eduardo de la Fuente, Sabrina Casanova, Kaya Mori, Xiaojie Wang, Sei Kato, Dai Tateishi, Hideki Uchiyama, Takaaki Tanaka, Hiroyuki Uchida, Shun Inoue, Dezhi Huang, Marianne Lemoine-Goumard, Daiki Miura, Shoji Ogawa, Shogo B. Kobayashi, Chris Done, Maxime Parra, Maria Díaz Trigo, Teo Muñoz-Darias, Montserrat Armas Padilla, Ryota Tomaru, Yoshihiro Ueda
The Astrophysical Journal Letters 978 ( 2 ) L20 - L20 2025.1
Publisher：American Astronomical Society
Abstract
A recent report on the detection of very-high-energy gamma rays from V4641 Sagittarii (V4641 Sgr) up to ≈0.8 PeV has made it the second confirmed “PeVatron” microquasar. Here we report on the observation of V4641 Sgr with X-Ray Imaging and Spectroscopy Mission (XRISM) in 2024 September. Thanks to the large field of view and low background, the CCD imager Xtend successfully detected for the first time X-ray extended emission around V4641 Sgr with a significance of ≳4.5σ and >10σ based on our imaging and spectral analysis, respectively. The spatial extent is estimated to have a radius of 7′ ± 3′ (13 ± 5 pc at a distance of 6.2 kpc) assuming a Gaussian-like radial distribution, which suggests that the particle acceleration site is within ~10 pc of the microquasar. If the X-ray morphology traces the diffusion of accelerated electrons, this spatial extent can be explained by either an enhanced magnetic field (∼80 μG) or a suppressed diffusion coefficient (∼10<sup>27</sup> cm<sup>2</sup> s<sup>−1</sup> at 100 TeV). The integrated X-ray flux, (4–6) × 10<sup>−12</sup> erg s<sup>−1</sup> cm<sup>−2</sup> (2–10 keV), would require a magnetic field strength higher than the Galactic mean (≳8 μG) if the diffuse X-ray emission originates from synchrotron radiation and the gamma-ray emission is predominantly hadronic. If the X-rays are of thermal origin, the measured extension, temperature, and plasma density can be explained by a jet with a luminosity of ∼2 × 10<sup>39</sup> erg s<sup>−1</sup>, which is comparable to the Eddington luminosity of this system.Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/ad9d11/pdf
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Overionized plasma in the supernova remnant Sagittarius A East anchored by XRISM observations Reviewed
XRISM Collaboration (including T. Tanaka)
Publications of the Astronomical Society of Japan 77 ( 1 ) L1 - L8 2024.12
DOI： 10.1093/pasj/psae111
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The XRISM/Resolve View of the Fe K Region of Cyg X-3 Reviewed International coauthorship
XRISM Collaboration (including T. Tanaka)
The Astrophysical Journal Letters 977 ( 2 ) L34 2024.12
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Recent Results on Supernova Remnants at Highest Energies Invited Reviewed
T. Tanaka
Proceedings of Science 417 022 2024.12
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The XRISM first-light observation: Velocity structure and thermal properties of the supernova remnant N 132D Reviewed International coauthorship
XRISM Collaboration (including T. Tanaka)
Publications of the Astronomical Society of Japan 76 ( 6 ) 1186 - 1201 2024.10
DOI： 10.1093/pasj/psae080
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XRISM Spectroscopy of the Fe Kα Emission Line in the Seyfert Active Galactic Nucleus NGC 4151 Reveals the Disk, Broad-line Region, and Torus Reviewed International coauthorship
XRISM Collaboration (including T. Tanaka)
The Astrophysical Journal Letters 973 ( 1 ) L25 2024.9
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Evaluation of the X-ray SOI pixel detector with the on-chip ADC
Hiroumi Matsuhashi, Kouichi Hagino, Aya Bamba, Ayaki Takeda, Masataka Yukumoto, Koji Mori, Yusuke Nishioka, Takeshi Go Tsuru, Mizuki Uenomachi, Tomonori Ikeda, Masamune Matsuda, Takuto Narita, Hiromasa Suzuki, Takaaki Tanaka, Ikuo Kurachi, Takayoshi Kohmura, Yusuke Uchida, Yasuo Arai, Shoji Kawahito
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1064 169426 - 169426 2024.7
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Search for Synchrotron Emission from Secondary Electrons of Proton–Proton Interactions in Galactic PeVatron Candidate HESS J1641-463 Reviewed International coauthorship
N. Tsuji, T. Tanaka, S. Safi-Harb, F. Aharonian, S. Casanova, R. Kothes, E. Moulin, H. Uchida, Y. Uchiyama
The Astrophysical Journal 967 ( 2 ) 138 2024.6
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Design study and spectroscopic performance of SOI pixel detector with a pinned depleted diode structure for X-ray astronomy Reviewed
M. Yukumoto, K. Mori, A. Takeda, Y. Nishioka, S. Yonemura, D. Izumi, U. Iwakiri, T. G. Tsuru, I. Kurachi, K. Hagino, Y. Arai, T. Kohmura, T. Tanaka, M. Kimura, Y. Fuchita, T. Yoshida, T. Ikeda
Nuclear Instruments and Methods in Physics Research A 1060 169033 2024.3
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Three-dimensional Velocity Diagnostics to Constrain the Type Ia Origin of Tycho's Supernova Remnant Reviewed
H. Uchida, T. Kasuga, K. Maeda, S.-H. Lee, T. Tanaka, A. Bamba
The Astrophysical Journal 962 ( 2 ) 159 2024.2
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Exploring the Circumstellar Environment of Tycho's Supernova Remnant. I. The Hydrodynamic Evolution of the Shock Reviewed
R. Kobashi, S.-H. Lee, T. Tanaka, K. Maeda
The Astrophysical Journal 961 ( 1 ) 32 2024.1