Observational study of nucleosynthesis in X-ray superburst using the MAXI-NICER cooperation

• Project/Area Number: 16K17717
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Chuo University (2018-2019); Institute of Physical and Chemical Research (2016-2017)
• Principal Investigator: Iwakiri Wataru 中央大学, 理工学部, 助教 (50749918)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: X線バースト / 元素合成 / MAXI / NICER / 時間領域天文学 / スーパーバースト

Outline of Final Research Achievements

To obtain an evidence for nucleosynthesis via the rp-process during type-I X-ray burst on NS-LMXBs, we established rapid follow up observation system between MAXI and NICER onboard ISS for infrequent long duration X-ray bursts. As a result, we succeeded in 32 follow-up observations of MAXI transients by NICER. A fastest response time among them is about 3 hours.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、共に国際宇宙ステーション(ISS)上にあり、2009年から広く浅く全天を監視しているMAXIと、2017年に新たに取り付けられた視野は狭いがＸ線望遠鏡で深く観測できるNICERの、お互いの長所を組み合わせ短所を補う、相補的な新たな観測体制を確立できた。これにより継続時間の短い貴重な突発現象の時間経過を研究する、時間領域天文学を推し進めることができ、X線だけでなく電波や可視光の研究者からも関心をいただいた。また、ISS内での日米のモジュール間の通信を議論することができたという点は、衛星軌道上における国際的な科学連携という観点でも意義のあるものになった。

Research Products

• [Int'l Joint Research] NASA Goddard Space Flight Center(米国)
• [Int'l Joint Research] NASA Goddard Space Flight Center(米国)
• [Int'l Joint Research] NASA Goddard Space Flight Center(米国)
• [Int'l Joint Research] NASA Goddard Space Flight Center(米国)
• [Journal Article] The 2019 super-Eddington outburst of RX J0209.6-7427: detection of pulsations and constraints on the magnetic field strength (2020)
  • Author(s): Vasilopoulos G、Ray P S、Gendreau K C、Jenke P A、Jaisawal G K、Wilson-Hodge C A、Strohmayer T E、Altamirano D、Iwakiri W B、Wolff M T、Guillot S、Malacaria C、Stevens A L
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 494 Issue: 4 Pages: 5350-5359
  • DOI: 10.1093/mnras/staa991
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spectral and Timing Analysis of the Accretion-powered Pulsar 4U 1626?67 Observed with Suzaku and NuSTAR (2019)
  • Author(s): Iwakiri Wataru B.、Pottschmidt Katja、Falkner Sebastian、Hemphill Paul B.、F?rst Felix、Nishimura Osamu、Schwarm Fritz-Walter、Wolff Michael T.、Marcu-Cheatham Diana M.、Chakrabarty Deepto、Tomsick John A.、Wilson-Hodge Colleen A.、Bissinger K?hnel Matthias、Terada Yukikatsu、Enoto Teruaki、Wilms J?rn
  • Journal Title: The Astrophysical Journal Volume: 878 Issue: 2 Pages: 121-137
  • DOI: 10.3847/1538-4357/ab1f87
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spectral Properties of Gamma-Ray Bursts Observed by the Suzaku Wide-band All-sky Monitor (2019)
  • Author(s): N. Ohmori, K. Yamaoka, M.Yamauchi, 他17名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 印刷中 Issue: 4 Pages: 76-76
  • DOI: 10.1093/pasj/psz054
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Discovery and Identification of MAXI J1621-501 as a Type I X-Ray Burster with a Super-orbital Period (2019)
  • Author(s): N. M. Gorgone, C. Kouveliotou, H. Negoro, R. A. M. J. Wijers, E. Bozzo, S. Guiriec, P. Bult, D. Huppenkothen, E. Goghs, A. Bahramian, J. Kennea, J. Linford, J. Miller-Jones, M. G. Baring, P. Beniamini, D. Chakrabarty, J. Granot, C. Hailey, F. A. Harrison, D. H. Hartmann, 他 9 名
  • Journal Title: The Astrophysical Journal Volume: 884 Issue: 2 Pages: 168-168
  • DOI: 10.3847/1538-4357/ab3e43
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A convolutional neural network approach for reconstructing polarization information of photoelectric X-ray polarimeters (2019)
  • Author(s): Kitaguchi Takao、Black Kevin、Enoto Teruaki、Hayato Asami、Hill Joanne E.、Iwakiri Wataru B.、Kaaret Philip、Mizuno Tsunefumi、Tamagawa Toru
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume: 942 Pages: 162389-162389
  • DOI: 10.1016/j.nima.2019.162389
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An enigmatic hump around 30 keV in Suzaku spectra of Aquila X-1 in the hard state (2019)
  • Author(s): Kubota Megu、Tamagawa Toru、Makishima Kazuo、Nakano Toshio、Iwakiri Wataru、Sugizaki Mutsumi、Ono Ko
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 71 Issue: 2 Pages: 33-33
  • DOI: 10.1093/pasj/psy148
  • NAID: 130008148320
  • Peer Reviewed / Open Access
• [Journal Article] The 7-year MAXI/GSC X-Ray Source Catalog in the High Galactic Latitude Sky (3MAXI) (2018)
  • Author(s): Kawamuro T., Ueda Y., Shidatsu M., Hori T., Morii M., Nakahira S., Isobe N., Kawai N., Mihara T., Matsuoka M., Morita T., Nakajima M., Negoro H., Oda S., Sakamoto T., Serino M., Sugizaki M., Tanimoto A., Tomida H., Tsuboi, Y. 他 11 名
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 238 Issue: 2 Pages: 32-32
  • DOI: 10.3847/1538-4365/aad1ef
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The 7-year MAXI/GSC Source Catalog of the Low-Galactic-latitude Sky (3MAXI) (2018)
  • Author(s): Hori T., Shidatsu, M., Ueda, Y., Kawamuro, T., Morii, M., Nakahira, S., Isobe, N., Kawai, N., Mihara T., Matsuoka, M., Morita, T., Nakajima, M., Negoro, H., Oda, S., Sakamoto, T., Serino, M., Sugizaki, M., Tanimoto, A., Tomida, H., Tsuboi, Y. 他 10 名
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 235 Issue: 1 Pages: 7-7
  • DOI: 10.3847/1538-4365/aaa89c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Suzaku Wide-band All-sky Monitor (WAM) Observtions of GRBs and SGRs (2017)
  • Author(s): K. Yamaoka, M. Ohno, M.S. Tashiro et al.
  • Journal Title: Publication of the Astronomical Society Japan Volume: 印刷中 Issue: 3 Pages: 2-2
  • DOI: 10.1093/pasj/psx026
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Discovery of the New X-Ray Transient MAXI J1807+132: A Candidate of a Neutron Star Low-mass X-Ray Binary (2017)
  • Author(s): Shidatsu M., Tachibana Y., Yoshii T., Negoro H., Kawamuro T., Iwakiri W., Nakahira S., Makishima K., Ueda Y., Kawai N., Serino M., and Kennea J.
  • Journal Title: The Astrophysical Journal Volume: 850 Issue: 2 Pages: 155-155
  • DOI: 10.3847/1538-4357/aa93f0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] X-ray Reflection and Exceptionally Long Thermonuclear Helium Burst from IGR J17062-6143 (2017)
  • Author(s): Keek L., Iwakiri W et al.,
  • Journal Title: Astrophysical Journal Volume: 836 Issue: 1 Pages: 111-126
  • DOI: 10.3847/1538-4357/836/1/111
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] MAXI/GSC observations of new superbursts from Ser X-1 and 4U 1705-44 (2017)
  • Author(s): W.B.Iwakiri, M.Serino, J. In ‘t Zand
  • Journal Title: the proceedings of 'Seven years of MAXI: monitoring X-ray transients' Volume: - Pages: 133-134
  • Open Access / Int'l Joint Research
• [Journal Article] Performance of the PRAXyS X-ray polarimeter (2016)
  • Author(s): Iwakiri, W. B.; Black, J. K.; Cole, R.; Enoto, T.; Hayato, A.; Hill, J. E.; Jahoda, K.; Kaaret, P.; Kitaguchi, T.; Kubota, M.; Marlowe, H.; McCurdy, R.; Takeuchi, Y.; Tamagawa, T.
  • Journal Title: Nuclear Inst. and Methods in Physics Research, A Volume: 838 Pages: 89-95
  • DOI: 10.1016/j.nima.2016.09.024
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] MAXI observations of long X-ray bursts (2016)
  • Author(s): Motoko Serino, Wataru Iwakiri, Toru Tamagawa, Takanori Sakamoto, Satoshi Nakahira, Masaru Matsuoka, Kazutaka Yamaoka, Hitoshi Negoro
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 6 Pages: 95-95
  • DOI: 10.1093/pasj/psw086
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Status report of the CubeSat X-ray observatory “NinjaSat” project (2020)
  • Author(s): Wataru Iwakiri
  • Organizer: Gravitational wave physics and astronomy: Genesis: The Third Annual Area Symposium
  • Int'l Joint Research
• [Presentation] X線観測を軸とした巨大恒星フレア観測の現状 (2020)
  • Author(s): 岩切渉
  • Organizer: Superflare mini-workshop
• [Presentation] MAXI-NICER連携によるRS CVn型連星からの巨大恒星フレア観測 (2019)
  • Author(s): 岩切渉
  • Organizer: 宇宙プラズマにおける粒子加速ワークショップ（2019年度前期）
  • Invited
• [Presentation] 惑星分光観測衛星「ひさき」とX線望遠鏡NICERによるおひつじ座UX星からの恒星フレア同時観測 (2019)
  • Author(s): 岩切渉
  • Organizer: 日本天文学会2019年秋季年会
• [Presentation] MAXI-NICER連携による巨大恒星フレアのX線観測の現状 (2019)
  • Author(s): 岩切渉
  • Organizer: 第10回光赤外線天文学大学間連携ワークショップ
  • Invited
• [Presentation] RXTE衛星で探るX線スーパーバースト後のスペクトル変動 (2019)
  • Author(s): 岩切渉
  • Organizer: ～中性子星の観測と理論～ 研究活性化ワークショップ 2019
• [Presentation] 巨大恒星フレアのMAXI-NICER連携によるX線観測と電波フォローアップ観測への期待 (2019)
  • Author(s): 岩切渉
  • Organizer: 茨城大学重点研究 研究会：「突発・変動現象の電波フォローアップ」
  • Invited
• [Presentation] RXTE衛星が捉えたX線バースターEXO 1745－248のスーパーバースト終了直後の強い輝線構造 (2019)
  • Author(s): 岩切渉
  • Organizer: 2019年日本天文学会春季年会
• [Presentation] MAXI-NICER連携による突発天体のX線観測：MANGAとOHMAN (2019)
  • Author(s): 岩切渉
  • Organizer: 第19回 宇宙科学シンポジウム
• [Presentation] MAXI-NICER連携で開拓するX線突発天体の時間領域 (2018)
  • Author(s): 岩切渉
  • Organizer: 木曽シュミットシンポジウム2018
• [Presentation] MAXI-NICER連携(MANGA)による巨大恒星フレアの軟X線観測 (2018)
  • Author(s): 岩切渉
  • Organizer: 2018年日本天文学会秋季年会
• [Presentation] 全天X線観測装置MAXIによるへび座X-1からのスーパーバーストの検出 (2017)
  • Author(s): 岩切渉
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-03-15
• [Presentation] The Performance of the TPC polarimeter for PRAXyS (2017)
  • Author(s): W. Iwakiri
  • Organizer: 2nd CORE-U conference: Cosmic Polarimetry from Micro to Macro Scales
  • Place of Presentation: Hiroshima University
  • Year and Date: 2017-02-17
  • Int'l Joint Research
• [Presentation] MAXIとNICERで迫るX線バースト天体におけるrp過程 (2017)
  • Author(s): 岩切渉
  • Organizer: 字核連研究会
• [Presentation] NuSTAR衛星による降着駆動型パルサー4U 1626－67の観測(2) (2017)
  • Author(s): 岩切渉
  • Organizer: 日本天文学会秋季年会
• [Presentation] X線バーストによる元素合成の現場は捉えることができるか？ (2017)
  • Author(s): 岩切渉
  • Organizer: ～中性子星の観測と理論～ 研究活性化ワークショップ 2017
• [Presentation] MAXI/GSC observation of a new superburst from Ser X-1 (2016)
  • Author(s): W. Iwakiri
  • Organizer: 7 years of MAXI
  • Place of Presentation: RIKEN
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] X-ray properties of the accretion powered pulsar 4U 1626-67 during the spin-up phase observed by NuSTAR (2016)
  • Author(s): W. Iwakiri
  • Organizer: NuSTAR Science meeting 2016
  • Place of Presentation: California Institute of Technology, Pasadena, USA
  • Year and Date: 2016-11-15
  • Int'l Joint Research
• [Presentation] NuSTAR衛星による降着駆動型パルサー4U 1626－67の観測 (2016)
  • Author(s): 岩切渉
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2016-09-14
• [Remarks] 7 years of MAXI : monitoring X-ray transients
  • URL: https://indico2.riken.jp/indico/conferenceDisplay.py?confId=2357