重力波源の可視光対応天体探査

2016 Fiscal Year Annual Research Report

• Project Area: New development in astrophysics through multimessenger observations of gravitational wave sources
• Project/Area Number: 15H00788
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: 田中 雅臣 国立天文台, 理論研究部, 助教 (70586429)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 光学赤外線天文学 / 重力波天文学 / マルチメッセンジャー天文学

Outline of Annual Research Achievements

当初の計画通り、東京大学木曽観測所の1.05mシュミット望遠鏡と広視野カメラKWFC (Kiso Wide Field Camera)を用いて、Advanced LIGOからの重力波アラートを受けた突発天体サーベイ観測を行った。平成２７年９月より、Advanced LIGOの第一期観測(O1)が行われ、重力波イベントが2例検出されている（重力波源 GW 150914、GW151226）。J-GEM (Japanese collaboration of Gravitational wave Electro-Magnetic follow-up)グループとして事前に結んでいた覚書に基づき、これらの重力波天体の情報を受け取り、KWFCを用いて広域の突発天体探査観測を実施した。GW150914に関しては平成２７年度中に結果をまとめ、既に論文を出版している。平成２８年度はGW151226に対して行なったフォローアップ観測に関して、データ解析、突発天体検出と論文執筆を行なった。GW151226のアラート時の位置決定精度は約1400平方度であったが、KWFCでは778平方度に及ぶ広域探査を実行することができた。このデータを解析した結果、13個の銀河系外突発天体を発見した。Sloan Digital Sky Survey (SDSS)の撮像・分光データに基づき距離を算出したところ、そのうち6天体が、重力波から推定された距離の範囲内にあることが分かった。それらの突発天体の絶対等級は全て-19等程度であり、Ia型超新星ほどの明るさをもっていたため、6天体とも重力波天体ではないと結論づけた。これらの結果をJ-GEM全体のフォローアップ観測結果と一緒にまとめ、論文を出版した。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Three-Dimensional Explosion Geometry of Stripped-Envelope Core-Collapse Supernovae. II. Modelling of Polarization (2017)
  • Author(s): Tanaka, M., Maeda, K., Mazzali, P. A., Kawabata, K. S., Nomoto, K.
  • Journal Title: The Astrophysical Journal Volume: 837 Pages: 105 (11pp)
  • DOI: 10.3847/1538-4357/aa6035
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] J-GEM Follow-Up Observations of The Gravitational Wave Source GW151226 (2017)
  • Author(s): Yoshida, M., Utsumi, Y., Tominaga, N., Morokuma. T., Tanaka, M., et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Pages: 9 (12pp)
  • DOI: 10.1093/pasj/psw113
  • Peer Reviewed / Open Access
• [Journal Article] Kilonova/Macronova Emission from Compact Binary Mergers (2016)
  • Author(s): Tanaka, M.
  • Journal Title: Advances in Astronomy Volume: 2016 Pages: id.634197
  • DOI: 10.1155/2016/6341974
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Machine-learning Selection of Optical Transients in Subaru/Hyper Suprime-Cam Survey (2016)
  • Author(s): Morii, M., Ikeda, S., Tominaga, N., Tanaka, M., Morokuma, T., Ishiguro, K., Yamato, J., Ueda, N., Suzuki, N., Yasuda, N., Yoshida, N.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Pages: 104 (8pp)
  • DOI: 10.1093/pasj/psw096
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] The 050709 macronova and the GRB/macronova connection (2016)
  • Author(s): Jin, Z. P., Hotokezaka, K., Li, X., Tanaka, M., D'Avanzo, P., Fan, Y. Z., Covino, S., Wei, D. M., Piran, T.
  • Journal Title: Nature Communications Volume: 7 Pages: 12898
  • DOI: 10.1038/ncomms12898
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Constraining the Age and Distance of the Galactic Supernova Remnant G156.2+5.7 by H-alpha Expansion Measurements (2016)
  • Author(s): Katsuda, S., Tanaka, M., Morokuma, T., Fesen, R., Milisavljevic, D.
  • Journal Title: The Astrophysical Journal Volume: 826 Pages: 108 (9pp)
  • DOI: 10.3847/0004-637X/826/2/108
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] J-GEM Follow-Up Observations to Search for an Optical Counterpart of The First Gravitational Wave Source GW150914 (2016)
  • Author(s): Morokuma, T., Tanaka, M., Asakura, Y., Abe, F., Tristrram, P. J., Utsumi, Y., Doi, M., Fujisawa, K., Itoh, R., Itoh, Y., Kawabata, K. S., Kawai, N., Kuraoda, D., Matsubayashi, K., Motohara, K., Murata, K. L., Nagayama, T., Ohta, K., Saito Y., Tamura, Y., Tominaga, N., Uemura, M., Yanagisawa, K., Yatsu, Y., Yoshida, M.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Pages: L9 (6pp)
  • DOI: 10.1093/pasj/psw061
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Localization and broadband follow-up of the gravitational-wave transient GW150914 (2016)
  • Author(s): Abbott, B. P., et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 826 Pages: L13 (8pp)
  • DOI: 10.3847/2041-8205/826/1/L13
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi-messenger signals of long-term core-collapse supernova simulations : synergetic observation strategies (2016)
  • Author(s): Nakamura, K., Horiuchi, S., Tanaka, M., Hayama, K., Takiwaki, T., & Kotake, K
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 461 Pages: 3296-3313
  • DOI: 10.1093/mnras/stw1453
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Models of Kilonova/macronova emission from black hole-neutron star mergers (2016)
  • Author(s): Kawaguchi, K., Kyutoku, K., Shibata, M., Tanaka, M.
  • Journal Title: The Astrophysical Journal Volume: 825 Pages: 52 (12pp)
  • DOI: 10.3847/0004-637X/825/1/52
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] OISTER Optical and Near-Infrared Observations of the Super-Chandrasekhar Supernova Candidate SN 2012dn: Dust Emission from the Circumstellar Shell (2016)
  • Author(s): Yamanaka, M., Maeda, K., Tanaka, M. , Tominaga, N., Kawabata, K. S., et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Pages: 68 (24pp)
  • DOI: 10.1093/pasj/psw047
  • Peer Reviewed / Open Access
• [Journal Article] An Effective Selection Method for Low-Mass Active Black Holes and First Spectroscopic Identification (2016)
  • Author(s): Morokuma, T., Tominaga, N., Tanaka, M., Yasuda, N., Furusawa, H., Taniguchi, Y., Kato, T., Jiang, J., Kuncarayakti, H., Morokuma-Matsui, K., Ikeda, H., Blinnikov. S., Nomoto, K., Kokubo, M., Doi, M.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Pages: 40 (10pp)
  • DOI: 10.1093/pasj/psw033
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radioactive decay products in neutron star merger ejecta: heating efficiency and gamma-ray emission (2016)
  • Author(s): Hotokezaka, K., Wanajo, S., Tanaka, M., Bamba, A., Terada, Y., Piran, T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 459 Pages: 35-43
  • DOI: 10.1093/mnras/stw404
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Multi-Messenger from Supernovae (2017)
  • Author(s): Tanaka, M.
  • Organizer: Workshop on Supernova at Hyper-Kamiokande
  • Place of Presentation: University of Tokyo, Tokyo, Japan
  • Year and Date: 2017-02-12 – 2017-02-13
  • Int'l Joint Research / Invited
• [Presentation] Rapid Transients from Subaru/HSC Transient Survey (2017)
  • Author(s): Tanaka, M.
  • Organizer: International Molecule-type Workshop "Transient Universe in the Big Survey Era: Understanding the Nature of Astrophysical Explosive Phenomena"
  • Place of Presentation: Kyoto University, Kyoto, Japan
  • Year and Date: 2017-01-23 – 2017-01-24
  • Int'l Joint Research
• [Presentation] 重力波天体からの電磁波放射 (2016)
  • Author(s): 田中雅臣
  • Organizer: 原子衝突学会第41回年会
  • Place of Presentation: 富山大学（富山県富山市）
  • Year and Date: 2016-12-10 – 2016-12-11
  • Invited
• [Presentation] Kilonova/Macronova Emission from Compact Binary Mergers (2016)
  • Author(s): Tanaka, M.
  • Organizer: Gravitational-Wave Astrophysics in the High Event Rate Regime
  • Place of Presentation: University of Tokyo, Tokyo, Japan
  • Year and Date: 2016-12-05 – 2016-12-06
  • Int'l Joint Research / Invited
• [Presentation] 突発天体天文学 (2016)
  • Author(s): 田中雅臣
  • Organizer: 第7回光赤外線天文学大学間連携ワークショップ
  • Place of Presentation: 京都大学（京都府京都市）
  • Year and Date: 2016-11-21 – 2016-11-22
  • Invited
• [Presentation] Kilonova/Macronova Emission from Compact Binary Mergers (2016)
  • Author(s): Tanaka, M.
  • Organizer: Compact stars and gravitational waves
  • Place of Presentation: Kyoto University, Kyoto, Japan
  • Year and Date: 2016-10-31 – 2016-11-04
  • Int'l Joint Research / Invited
• [Presentation] Kilonova Emission from Compact Binary Mergers (2016)
  • Author(s): Tanaka, M.
  • Organizer: Supernovae Through the Ages
  • Place of Presentation: Hotel Hangaroa, Easter island, Chile
  • Year and Date: 2016-08-08 – 2016-08-13
  • Int'l Joint Research
• [Presentation] 重力波天体とマルチメッセンジャー天文学 (2016)
  • Author(s): 田中雅臣
  • Organizer: 第46回天文天体物理若手夏の学校
  • Place of Presentation: ホテル圓山荘（長野県千曲市）
  • Year and Date: 2016-07-29 – 2016-07-29
  • Invited
• [Presentation] Time-Domain Science with ULTIMATE-Subaru (2016)
  • Author(s): Tanaka, M.
  • Organizer: ULTIMATE-Subaru Science Workshop 2016
  • Place of Presentation: National Astronomical Observatory of Japan, Mitaka, Japan
  • Year and Date: 2016-06-16 – 2016-06-17
  • Int'l Joint Research / Invited
• [Presentation] Three-dimensional geometry of core-collapse supernovae: observations and modelling (2016)
  • Author(s): Tanaka, M.
  • Organizer: Bridging the gap: from massive stars to supernovae
  • Place of Presentation: Kavli Royal Society Centre, Buckinghamshire, UK
  • Year and Date: 2016-06-01 – 2016-06-02
  • Int'l Joint Research / Invited
• [Presentation] TMT and Gravitational Wave Astronomy (2016)
  • Author(s): Tanaka, M.
  • Organizer: TMT Science Forum 2016,
  • Place of Presentation: Kyoto International Community House, Kyoto, Japan
  • Year and Date: 2016-05-24 – 2016-05-26
  • Int'l Joint Research / Invited
• [Presentation] Transient Surveys with Subaru/Hyper Suprime-Cam (2016)
  • Author(s): Tanaka, M.
  • Organizer: The Ninth Harvard-Smithsonian Conference on Theoretical Astrophysics "The transient sky"
  • Place of Presentation: Sheraton Commander Hotel, Boston, US
  • Year and Date: 2016-05-16 – 2016-05-19
  • Int'l Joint Research / Invited
• [Presentation] Electromagnetic Counterparts of Gravitational Wave Sources (2016)
  • Author(s): 田中雅臣
  • Organizer: The 4th DTA symposium: Compact stars and gravitational wave astronomy
  • Place of Presentation: 国立天文台（東京都三鷹市）
  • Year and Date: 2016-05-13 – 2016-05-14
  • Invited