Search for Planets around Low-mass Stars: Uncovering the Diversity and Origin of Exoplanets

• Project/Area Number: 16K17660
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Hirano Teruyuki 東京工業大学, 理学院, 助教 (10727449)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 光赤外天文学 / 太陽系外惑星 / トランジット / 近赤外高分散分光 / 低温度星 / 近赤外線観測 / 系外惑星 / K2ミッション / 光学赤外線天文学

Outline of Final Research Achievements

In an attempt to uncover the origin and diversity of exoplanetary systems, we conducted observational studies of exoplanets around low-mass stars. Our studies included 1. development of a new Doppler technique in the near infrared, 2. search for transiting planets around low-mass stars by combining the space-based transit surveys with ground-based follow-up observations, 3. characterizations of transiting planets around low-mass stars.

Academic Significance and Societal Importance of the Research Achievements

太陽系外惑星系の多様性の起源には多くの謎があり，系外惑星系の観測により惑星の分布や統計的特徴を明らかにすることでその起源に迫ることができる。本研究は，これまであまり探査が進んでいなかった低質量星のまわりの惑星の発見によってその分布を詳細に明らかにしたとともに，低質量星観測の方法論の開拓によって今後の系外惑星探査のための新たな枠組みを構築した。また，これまでほとんど分かっていなかった極めて低温な恒星のまわりの惑星の特徴を明らかにした。

Research Products

• [Int'l Joint Research] ハワイ大学/プリンストン大学/テキサス大学(米国)
• [Int'l Joint Research] トリノ大学(イタリア)
• [Int'l Joint Research] カナリア天体物理研究所(スペイン)
• [Int'l Joint Research] カール・シュヴァルツシルト天文台/ケルン大学/ベルリン工科大学(ドイツ)
• [Int'l Joint Research] オーフス大学(デンマーク)
• [Int'l Joint Research]
• [Int'l Joint Research] プリンストン大学/ハワイ大学/マクドナルド天文台(米国)
• [Int'l Joint Research] オーフス大学(デンマーク)
• [Int'l Joint Research] IAC(スペイン)
• [Int'l Joint Research] トリノ大学(イタリア)
• [Int'l Joint Research] ケルン大学/ドイツ航空宇宙センター(ドイツ)
• [Int'l Joint Research]
• [Int'l Joint Research] プリンストン大学/マサチューセッツ工科大学/ハワイ大学(米国)
• [Int'l Joint Research] オーフス大学(デンマーク)
• [Int'l Joint Research] IAC(スペイン)
• [Int'l Joint Research] トリノ大学(イタリア)
• [Int'l Joint Research] ケルン大学/ドイツ航空宇宙センター(ドイツ)
• [Int'l Joint Research]
• [Int'l Joint Research] プリンストン大学/マサチューセッツ工科大学/ハワイ大学(米国)
• [Int'l Joint Research] オーフス大学(デンマーク)
• [Int'l Joint Research] IAC(スペイン)
• [Int'l Joint Research] トリノ大学(イタリア)
• [Journal Article] It Takes Two Planets in Resonance to Tango around K2-146 (2020)
  • Author(s): Lam Kristine W. F.、Korth Judith、Masuda Kento、Csizmadia Szilard、Eigmuller Philipp、Stefansson Gumundur Kari、Endl Michael、Albrecht Simon、Robertson Paul、Luque Rafael、Livingston John H.、Hirano Teruyuki、et al.
  • Journal Title: The Astronomical Journal Volume: 159 Issue: 3 Pages: 120-120
  • DOI: 10.3847/1538-3881/ab66c9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for Spin-Orbit Alignment in the TRAPPIST-1 System (2020)
  • Author(s): Hirano Teruyuki、Gaidos Eric、Winn Joshua N.、et al.
  • Journal Title: The Astrophysical Journal Volume: 890 Issue: 2 Pages: L27-L27
  • DOI: 10.3847/2041-8213/ab74dc
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Kojima-1Lb Is a Mildly Cold Neptune around the Brightest Microlensing Host Star (2019)
  • Author(s): Fukui A.、Suzuki D.、Koshimoto N.、Bachelet E.、Vanmunster T.、Storey D.、Maehara H.、Yanagisawa K.、Yamada T.、Yonehara A.、Hirano T.、et al.
  • Journal Title: The Astronomical Journal Volume: 158 Issue: 5 Pages: 206-206
  • DOI: 10.3847/1538-3881/ab487f
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18 (2019)
  • Author(s): Crossfield Ian J. M.、Waalkes William、Newton Elisabeth R.、et al.
  • Journal Title: The Astrophysical Journal Volume: 883 Issue: 1 Pages: L16-L16
  • DOI: 10.3847/2041-8213/ab3d30
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Greening of the brown-dwarf desert. EPIC 212036875b: a 51 MJ object in a 5-day orbit around an F7 V star (2019)
  • Author(s): Persson Carina M.、Csizmadia Szilard、Mustill Alexander J.、Fridlund Malcolm、Hatzes Artie P.、Nowak Grzegorz、Georgieva Iskra、Gandolfi Davide、Davies Melvyn B.、Livingston John H.、Palle Enric、Montanes Rodriguez Pilar、Endl Michael、Hirano Teruyuki、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 628 Pages: A64-A64
  • DOI: 10.1051/0004-6361/201935505
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Mass Limit for the Young Transiting Planet V1298 Tau b (2019)
  • Author(s): Beichman Charles、Hirano Teruyuki、David Trevor J.、Kotani Takayuki、Hillenbrand Lynne A.、Vasisht Gautam、Ciardi David R.、Harakawa Hiroki、Kudo Tomoyuki、Omiya Masashi、Kuzuhara Masayuki、Tamura Motohide
  • Journal Title: Research Notes of the AAS Volume: 3 Issue: 6 Pages: 89-89
  • DOI: 10.3847/2515-5172/ab2c9d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Hot Saturn Orbiting an Oscillating Late Subgiant Discovered by TESS (2019)
  • Author(s): Huber Daniel、Chaplin William J.、Chontos Ashley、et al.
  • Journal Title: The Astronomical Journal Volume: 157 Issue: 6 Pages: 245-245
  • DOI: 10.3847/1538-3881/ab1488
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-295 b and K2-237 b: Two Transiting Hot Jupiters (2019)
  • Author(s): Smith, A. M. S., Csizmadia, Sz., Gandolfi, D., Albrecht, S., Alonso, R., Barragan, O., Cabrera, J., Cochran, W. D., Dai, F., Deeg, H., Eigmuller, Ph., Endl, M., Erikson, A., Fridlund, M., Fukui, A., Grziwa, S., Guenther, E. W., Hatzes, A. P., Hidalgo, D., Hirano, T. et al.
  • Journal Title: Acta Astronomica Volume: 69 Pages: 135-158
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Monitoring of the D doublet of neutral sodium during transits of two ‘evaporating’ planets (2019)
  • Author(s): Gaidos E、Hirano T、Ansdell M
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 485 Issue: 3 Pages: 3876-3886
  • DOI: 10.1093/mnras/stz693
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Transiting Multi-planet System HD15337: Two Nearly Equal-mass Planets Straddling the Radius Gap (2019)
  • Author(s): Gandolfi Davide、Fossati Luca、Livingston John H.、et al.
  • Journal Title: The Astrophysical Journal Volume: 876 Issue: 2 Pages: L24-L24
  • DOI: 10.3847/2041-8213/ab17d9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Curious Case of KOI 4: Confirming Kepler’s First Exoplanet Detection (2019)
  • Author(s): Chontos Ashley、Huber Daniel、Latham David W.、Bieryla Allyson、Eylen Vincent Van、Bedding Timothy R.、Berger Travis、Buchhave Lars A.、Campante Tiago L.、Chaplin William J.、Colman Isabel L.、Coughlin Jeff L.、Davies Guy、Hirano Teruyuki、et al.
  • Journal Title: The Astronomical Journal Volume: 157 Issue: 5 Pages: 192-192
  • DOI: 10.3847/1538-3881/ab0e8e
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-290: a warm Jupiter and a mini-Neptune in a triple-star system (2019)
  • Author(s): Hjorth M、Justesen A B、Hirano T、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Issue: 3 Pages: 3522-3536
  • DOI: 10.1093/mnras/stz139
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Spitzer Transit Follow-up of Planet Candidates from the K2 Mission (2019)
  • Author(s): Livingston John H.、Crossfield Ian J. M.、Werner Michael W.、Gorjian Varoujan、Petigura Erik A.、Ciardi David R.、Dressing Courtney D.、Fulton Benjamin J.、Hirano Teruyuki、Schlieder Joshua E.、et al.
  • Journal Title: The Astronomical Journal Volume: 157 Issue: 3 Pages: 102-102
  • DOI: 10.3847/1538-3881/aaff69
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] HD 219666 b: a hot-Neptune from TESS Sector 1 (2019)
  • Author(s): Esposito M.、Armstrong D. J.、Gandolfi D.、Adibekyan V.、Fridlund M.、Santos N. C.、Livingston J. H.、Delgado Mena E.、Fossati L.、Lillo-Box J.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 623 Pages: A165-A165
  • DOI: 10.1051/0004-6361/201834853
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection and characterization of an ultra-dense sub-Neptunian planet orbiting the Sun-like star K2-292 (2019)
  • Author(s): Luque R.、Nowak G.、Palle E.、Dai F.、Kaminski A.、Nagel E.、Hidalgo D.、Bauer F.、Lafarga M.、Livingston J.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 623 Pages: A114-A114
  • DOI: 10.1051/0004-6361/201834952
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection and Doppler monitoring of K2-285 (EPIC 246471491), a system of four transiting planets smaller than Neptune (2019)
  • Author(s): Palle E.、Nowak G.、Luque R.、Hidalgo D.、Barragan O.、Prieto-Arranz J.、Hirano T.、Fridlund M.、Gandolfi D.、Livingston J.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 623 Pages: A41-A41
  • DOI: 10.1051/0004-6361/201834001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] K2-264: a transiting multiplanet system in the Praesepe open cluster (2018)
  • Author(s): Livingston John H、Dai Fei、Hirano Teruyuki、Gandolfi Davide、Trani Alessandro A、Nowak Grzegorz、Cochran William D、Endl Michael、Albrecht Simon、Barragan Oscar、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Issue: 1 Pages: 8-18
  • DOI: 10.1093/mnras/sty3464
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The little dippers: transits of star-grazing exocomets? (2018)
  • Author(s): Ansdell M、Gaidos E、Jacobs T L、Mann A、Manara C F、Kennedy G M、Vanderburg A、Kenworthy M、Hirano T、LaCourse D M、Hedges C、Frasca A
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 483 Issue: 3 Pages: 3579-3591
  • DOI: 10.1093/mnras/sty3289
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-140b and K2-180b - Characterization of a hot Jupiter and a mini-Neptune from the K2 mission (2018)
  • Author(s): Korth J、Csizmadia Sz、Gandolfi D、Fridlund M、Patzold M、Hirano T、Livingston J、Persson C M、Deeg H J、Justesen A B、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 482 Issue: 2 Pages: 1807-1823
  • DOI: 10.1093/mnras/sty2760
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Back to “Normal” for the Disintegrating Planet Candidate KIC 12557548 b (2018)
  • Author(s): Schlawin Everett、Hirano Teruyuki、Kawahara Hajima、Teske Johanna、Green Elizabeth M.、Rackham Benjamin V.、Fraine Jonathan、Bushra Rafia
  • Journal Title: The Astronomical Journal Volume: 156 Issue: 6 Pages: 281-281
  • DOI: 10.3847/1538-3881/aaeb32
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-260 b: a hot Jupiter transiting an F star, and K2-261 b: a warm Saturn around a bright G star (2018)
  • Author(s): Johnson M. C.、Dai F.、Justesen A. B.、Gandolfi D.、Hatzes A. P.、Nowak G.、Endl M.、Cochran W. D.、Hidalgo D.、Watanabe N.、Parviainen H.、Hirano T.、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 481 Issue: 1 Pages: 596-612
  • DOI: 10.1093/mnras/sty2238
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Earth’s atmosphere’s lowest layers probed during a lunar eclipse (2018)
  • Author(s): Kawauchi Kiyoe、Narita Norio、Sato Bun’ei、Hirano Teruyuki、Kawashima Yui、Nakamoto Taishi、Yamashita Takuya、Tamura Motohide
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 5 Pages: 84-84
  • DOI: 10.1093/pasj/psy079
  • Peer Reviewed / Open Access
• [Journal Article] Orbital Characterization of GJ1108A System, and Comparison of Dynamical Mass with Model-derived Mass for Resolved Binaries (2018)
  • Author(s): Mizuki T.、Kuzuhara M.、Mede K.、Schlieder J. E.、Janson M.、Brandt T. D.、Hirano T.、Narita N.、Wisniewski J.、Yamada T.、Biller B.、Bonnefoy M.、Carson J. C.、McElwain M. W.、Matsuo T.、Turner E. L.、Mayama S.、Akiyama E. et al.
  • Journal Title: The Astrophysical Journal Volume: 865 Issue: 2 Pages: 152-152
  • DOI: 10.3847/1538-4357/aada82
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Mass determination of the 1:3:5 near-resonant planets transiting GJ 9827 (K2-135) (2018)
  • Author(s): Prieto-Arranz J.、Palle E.、Gandolfi D.、Barragan O.、Guenther E. W.、Dai F.、Fridlund M.、Hirano T.、Livingston J.、Luque R.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 618 Pages: A116-A116
  • DOI: 10.1051/0004-6361/201832872
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Super-Earth of 8 M_Earth in a 2.2-day orbit around the K5V star K2-216 (2018)
  • Author(s): Persson C. M.、Fridlund M.、Barragan O.、Dai F.、Gandolfi D.、Hatzes A. P.、Hirano T.、Grziwa S.、Korth J.、Prieto-Arranz J.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 618 Pages: A33-A33
  • DOI: 10.1051/0004-6361/201832867
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] HD 89345: a bright oscillating star hosting a transiting warm Saturn-sized planet observed by K2 (2018)
  • Author(s): Van Eylen V.、Dai F.、Mathur S.、Gandolfi D.、Albrecht S.、Fridlund M.、Garcia R. A.、Guenther E、Hjorth M、Justesen A B、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 478 Issue: 4 Pages: 4866-4880
  • DOI: 10.1093/mnras/sty1390
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] 44 Validated Planets from K2 Campaign 10 (2018)
  • Author(s): Livingston John H.、Endl Michael、Dai Fei、Cochran William D.、Barragan Oscar、Gandolfi Davide、Hirano Teruyuki、Grziwa Sascha、Smith Alexis M. S.、Albrecht Simon、et al.
  • Journal Title: The Astronomical Journal Volume: 156 Issue: 2 Pages: 78-78
  • DOI: 10.3847/1538-3881/aaccde
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Performance tests of Subaru/IRD for very precise and stable infrared radial velocity observations (2018)
  • Author(s): Omiya Masashi、Ueda Akitoshi、Jacobson Shane、Hodapp Klaus、Kurokawa Takashi、Kokubo Tsukasa、Tamura Motohide、Mori Takahiro、Tanaka Yosuke、Kudo Tomoyuki、Kuzuhara Masayuki、Kotani Takayuki、Hirano Teruyuki、Ishizuka Masato、Nishikawa Jun、Konishi Mihoko、Hosokawa Ko、Kusakabe Nobuhiko
  • Journal Title: Proceedings of the SPIE Volume: 10702 Pages: 219-219
  • DOI: 10.1117/12.2311832
  • Int'l Joint Research
• [Journal Article] The infrared Doppler (IRD) instrument for the Subaru telescope: instrument description and commissioning results (2018)
  • Author(s): T. Kotani, M. Tamura, J. Nishikawa, A. Ueda, M. Kuzuhara, M. Omiya, J. Hashimoto, M. Ishizuka, T. Hirano, H. Suto, T. Kurokawa, T. Kokubo, T. Mori, Y. Tanaka, K. Kashiwagi, M. Konishi, T. Kudo, B. Sato, S. Jacobson, K. W. Hodapp, D. B. Hall, W. Aoki, T. Usuda, S. Nishiyama, et al.
  • Journal Title: Proceedings of the SPIE Volume: 10702 Pages: 11-18
  • DOI: 10.1117/12.2311836
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-141 b (2018)
  • Author(s): Barragan O.、Gandolfi D.、Dai F.、Livingston J.、Persson C. M.、Hirano T.、Narita N.、Csizmadia Sz.、Winn J. N.、Nespral D.、Prieto-Arranz J.、et al.
  • Journal Title: Astronomy & Astrophysics Volume: 612 Pages: A95-A95
  • DOI: 10.1051/0004-6361/201732217
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radial Velocity Follow-up of the Disintegrating Planet KIC 12557548b (2018)
  • Author(s): Masuda, K., Hirano, T., Kawahara, H., Sato, B.
  • Journal Title: Research Notes of the American Astronomical Society Volume: 2 Issue: 1 Pages: 50-50
  • DOI: 10.3847/2515-5172/aaba12
• [Journal Article] Exoplanets around Low-mass Stars Unveiled by K2 (2018)
  • Author(s): Hirano, T., Dai, F., Gandolfi, D., Fukui, A., Livingston, J. H., Miyakawa, K., Endl, M., Cochran, W. D., Alonso-Floriano, F. J., Kuzuhara, M., et al.
  • Journal Title: The Astronomical Journal Volume: 155 Issue: 3 Pages: 127-127
  • DOI: 10.3847/1538-3881/aaa9c1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] K2-155: A Bright Metal-poor M Dwarf with Three Transiting Super-Earths (2018)
  • Author(s): Hirano, T., Dai, F., Livingston, J. H., Fujii, Y., Cochran, W. D., Endl, M., Gandolfi, D., Redfield, S., Winn, J. N., Guenther, E. W., et al.
  • Journal Title: The Astronomical Journal Volume: 155 Issue: 3 Pages: 124-124
  • DOI: 10.3847/1538-3881/aaaa6e
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three Small Planets Transiting a Hyades Star (2018)
  • Author(s): Livingston, J. H., Dai, F., Hirano, T., Gandolfi, D., Nowak, G., Endl, M., Velasco, S., Fukui, A., Narita, N., Prieto-Arranz, J., et al.
  • Journal Title: The Astronomical Journal Volume: 155 Issue: 3 Pages: 115-115
  • DOI: 10.3847/1538-3881/aaa841
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] K2-137 b: an Earth-sized planet in a 4.3-h orbit around an M-dwarf (2018)
  • Author(s): Smith, A. M. S., Cabrera, J., Csizmadia, Sz, Dai, F., Gandolfi, D., Hirano, T., Winn, J. N., Albrecht, S., Alonso, R., Antoniciello, G., et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 474 Issue: 4 Pages: 5523-5533
  • DOI: 10.1093/mnras/stx2891
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Three Super-Earths Transiting the Nearby Star GJ 9827 (2017)
  • Author(s): Niraula, P., Redfield, S., Dai, F., Barragan, O., Gandolfi, D., Cauley, P. W., Hirano, T., Korth, J., Smith, A. M. S., Prieto-Arranz, J., et al.
  • Journal Title: The Astronomical Journal Volume: 154 Issue: 6 Pages: 266-266
  • DOI: 10.3847/1538-3881/aa957c
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Discovery and Mass Measurement of a New Ultra-short-period Planet: K2-131b (2017)
  • Author(s): Dai, F., Winn, J. N., Gandolfi, D., Wang, S. X., Teske, J. K., Burt, J., Albrecht, S., Barragan, O., Cochran, W. D., Endl, M., et al.
  • Journal Title: The Astronomical Journal Volume: 154 Issue: 6 Pages: 226-226
  • DOI: 10.3847/1538-3881/aa9065
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] High-resolution Spectroscopic Detection of TiO and a Stratosphere in the Day-side of WASP-33b (2017)
  • Author(s): Nugroho, S. K., Kawahara, H., Masuda, K., Hirano, T., Kotani, T., Tajitsu, A.
  • Journal Title: The Astronomical Journal Volume: 154 Issue: 6 Pages: 221-221
  • DOI: 10.3847/1538-3881/aa9433
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Transiting Multi-planet System HD 3167: A 5.7 M_Earth Super-Earth and an 8.3 M_Earth Mini-Neptune (2017)
  • Author(s): Gandolfi, D., Barragan, O., Hatzes, A. P., Fridlund, M., Fossati, L., Donati, P., Johnson, M. C., Nowak, G., Prieto-Arranz, J., Albrecht, S., et al.
  • Journal Title: The Astronomical Journal Volume: 154 Issue: 3 Pages: 123-123
  • DOI: 10.3847/1538-3881/aa832a
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] K2-111 b - a short period super-Earth transiting a metal poor, evolved old star (2017)
  • Author(s): Fridlund, M., Gaidos, E., Barragan, O., Persson, C. M., Gandolfi, D., Cabrera, J., Hirano, T., Kuzuhara, M., Csizmadia, S., Nowak, G., et al.
  • Journal Title: Astronomy & Astrophysics Volume: 604 Pages: A16-A16
  • DOI: 10.1051/0004-6361/201730822
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Multi-color simultaneous photometry of the T-Tauri star with planetary candidate, CVSO 30 (2017)
  • Author(s): Masahiro Onitsuka, Akihiko Fukui, Norio Narita, Teruyuki Hirano, Nobuhiko Kusakabe, Tsuguru Ryu, Motohide Tamura
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 2 Pages: 106-106
  • DOI: 10.1093/pasj/psx004
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] K2-106, a system containing a metal-rich planet and a planet of lower density (2017)
  • Author(s): Guenther, E. W., Barragan, O., Dai, F., Gandolfi, D., Hirano, T., Fridlund, M., Fossati, L., Chau, A., Helled, R., Korth, J., et al.
  • Journal Title: Astronomy & Astrophysics Volume: 608 Pages: A93-A93
  • DOI: 10.1051/0004-6361/201730885
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] EPIC 219388192b - An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster (2017)
  • Author(s): Grzegorz Nowak, Enric Palle, Davide Gandolfi, Fei Dai, Antonino F. Lanza, Teruyuki Hirano, Oscar Barragan, Akihiko Fukui, Hans Bruntt, Michael Endl, William D. Cochran, et al. (including Norio Narita)
  • Journal Title: Astronomical Journal Volume: 153 Issue: 3 Pages: 131-131
  • DOI: 10.3847/1538-3881/aa5cb6
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The K2-ESPRINT project. VI. K2-105 b, a hot Neptune around a metal-rich G-dwarf (2017)
  • Author(s): Norio Narita, Teruyuki Hirano, Akihiko Fukui, Yasunori Hori, Fei Dai, Liang Yu, John Livingston, Tsuguru Ryu, Grzegorz Nowak, Masayuki Kuzuhara, Bun'ei Sato, Yoichi Takeda, Simon Albrecht, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 2 Pages: 29-29
  • DOI: 10.1093/pasj/psx002
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The K2-ESPRINT Project IV. A Hot Jupiter in a Prograde Orbit with a Possible Stellar Companion (2016)
  • Author(s): Hirano, T.; Nowak, G,; Kuzuhara, M. et al. (12名中12番目)
  • Journal Title: The Astrophysical Journal Volume: 825 Issue: 1 Pages: 53-53
  • DOI: 10.3847/0004-637x/825/1/53
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Doppler Monitoring of five K2 Transiting Planetary Systems (2016)
  • Author(s): Fei Dai, Joshua N. Winn, Simon Albrecht, Pamela Arriagada, Allyson Bieryla, R. Paul Butler, Jeffrey D. Crane, Teruyuki Hirano, John Asher Johnson, Amanda Kiilerich, David W. Latham, Norio Narita, Grzegorz Nowak, Enric Palle, Ignasi Ribas, Leslie A. Rogers, Roberto Sanchis-Ojeda, et al.
  • Journal Title: Astrophysical Journal Volume: 823 Issue: 2 Pages: 115-115
  • DOI: 10.3847/0004-637x/823/2/115
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Ground-based Transit Observation of the Habitable-zone Super-Earth K2-3d (2016)
  • Author(s): Akihiko Fukui, John Livingston, Norio Narita, Teruyuki Hirano, Masahiro Onitsuka, Tsuguru Ryu, Nobuhiko Kusakabe
  • Journal Title: Astronomical Journal Volume: 152 Issue: 6 Pages: 171-171
  • DOI: 10.3847/0004-6256/152/6/171
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 明るい低質量星まわりのハビタブルゾーン存在する地球型惑星探査 (2020)
  • Author(s): Teruyuki Hirano, Norio Narita, Akihiko Fukui, Yuka Fujii, Bun’ei Sato, John Livingston
  • Organizer: 第7回 宇宙における生命ワークショップ
• [Presentation] Solar System Objects and Exoplanets (2020)
  • Author(s): Matt Griffin, Teruyuki Hirano
  • Organizer: SPICA collaboration meeting
  • Int'l Joint Research
• [Presentation] 分光観測を用いたトランジット系外惑星探査の現状 (2020)
  • Author(s): 平野照幸
  • Organizer: 第25回天体スペクトル研究会
  • Invited
• [Presentation] SPICAが切り拓くサイエンス：星・惑星形成，惑星系の観測ハイライト (2020)
  • Author(s): 平野照幸，井上剛志，本田充彦，SPICAサイエンス検討会
  • Organizer: 日本天文学会2020年春季年会
  • Invited
• [Presentation] 近赤外高分散分光器IRDによる系外惑星トランジット分光観測 (2019)
  • Author(s): 平野照幸，Eric Gaidos，葛原昌幸，小谷隆行，田村元秀，すばる/IRDチーム
  • Organizer: 日本天文学会2019年秋季年会
• [Presentation] IRDデータの視線速度解析 (2019)
  • Author(s): 平野照幸
  • Organizer: IRD-SSPキックオフミーティング
  • Invited
• [Presentation] SPICAサイエンス検討会「太陽系・系外惑星班」の活動報告 (2019)
  • Author(s): 臼井寛裕，大坪貴文，水木敏幸（宇宙研），奥住聡, 奥谷彩香，大野和正，関根康人，平野照幸，藤井友香，笠羽康正，川島由依，癸生川陽子，小林仁美，小林浩，佐川英夫，空華智子，高橋葵，前澤裕之，松尾太郎，薮田ひかる，SPICAチーム
  • Organizer: 日本惑星科学会2019年秋季講演会
• [Presentation] 太陽系・系外惑星班：overview (2019)
  • Author(s): 平野照幸
  • Organizer: SPICAサイエンス検討会： 中間報告会
• [Presentation] 明るい低質量星まわりのハビタブルゾーンに存在する地球型惑星探査 (2019)
  • Author(s): 平野照幸，Fei Dai, Davide Gandolfi, 成田憲保，福井暁彦，藤井友香，佐藤文衛
  • Organizer: 第7回宇宙における生命ワークショップ
• [Presentation] 可視光高分散分光による(M型)恒星パラメータ推定1 (2018)
  • Author(s): 平野照幸
  • Organizer: 系外惑星研究のための恒星特徴づけワークショップ
• [Presentation] 188cm望遠鏡によるトランジット惑星系のキャラクタリゼーション (2018)
  • Author(s): 平野照幸
  • Organizer: 岡山188cm望遠鏡による新たなサイエンスの展開
• [Presentation] すばるIRDの視線速度解析パイプラインと現実的な視線速度精度 (2017)
  • Author(s): 平野照幸，佐藤文衛，小谷隆行，葛原昌幸，大宮正士，原川紘季，福井暁彦，成田憲保，田村元秀，黒川隆志，西川淳，すばる/IRDチーム
  • Organizer: 日本天文学会2017年春季年会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-03-16
• [Presentation] K2ミッションを利用した近傍の恒星周りの小型トランジット惑星の発見と特徴付け (2017)
  • Author(s): 平野照幸
  • Organizer: 第5回 宇宙における生命ワークショップ
  • Place of Presentation: 一橋大学一橋講堂
  • Year and Date: 2017-03-07
• [Presentation] Precision Doppler Spectroscopy in the Near Infrared: Pipeline and Tentative Results (2017)
  • Author(s): Teruyuki Hirano
  • Organizer: RESCEU/Planet2 International Symposium "Planet Formation around Snowline"
  • Int'l Joint Research
• [Presentation] Properties of M-dwarf Exoplanets Unveiled by Transit Surveys and Follow-up Observations (2017)
  • Author(s): Teruyuki Hirano
  • Organizer: Future Exploration of Star and Planet Formation with Subaru
  • Int'l Joint Research / Invited
• [Presentation] 系外惑星探査におけるガウス過程を用いたデータモデリング (2017)
  • Author(s): 平野照幸
  • Organizer: 天文学におけるデータ科学的方法
  • Invited
• [Presentation] K2ミッションで検出された小型惑星候補の地上追観測 (2017)
  • Author(s): 平野照幸，宮川浩平，佐藤文衛，福井暁彦，成田憲保，John Livingston，笠嗣瑠，葛原昌幸，KESPRINTチーム
  • Organizer: 日本天文学会2017年秋季年会
• [Presentation] 系外惑星系 -- 第２の地球を探せ (2016)
  • Author(s): 平野照幸
  • Organizer: 連星系・変光星・低温度星研究会 2016
  • Place of Presentation: 慶應義塾大学
  • Year and Date: 2016-10-31
  • Invited
• [Presentation] K2-ESRPINTプロジェクトによるトランジット系外惑星探査:特徴的な惑星系の報告と将来展望 (2016)
  • Author(s): 平野照幸，佐藤文衛，福井暁彦，竹田洋一，工藤智幸，鬼塚昌宏，笠嗣瑠，成田憲保，葛原昌幸，日下部展彦，田村元秀，Enric Palle，Josh Winn，Ignasi Ribas，Simon Albrecht
  • Organizer: 日本天文学会2016年秋季年会
  • Place of Presentation: 愛媛大学
  • Year and Date: 2016-09-15