Study on evolutionary processes of the Galactic disk based on multi-dimensional data of Cepheid variable stars

• Project/Area Number: 18H01248
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 16010:Astronomy-related
• Research Institution: The University of Tokyo
• Principal Investigator: Matsunaga Noriyuki 東京大学, 大学院理学系研究科(理学部), 助教 (80580208)
• Co-Investigator(Kenkyū-buntansha): 辻本 拓司 国立天文台, JASMINEプロジェクト, 助教 (10270456) ; 小林 尚人 東京大学, 大学院理学系研究科(理学部), 准教授 (50280566) ; 河北 秀世 京都産業大学, 理学部, 教授 (70356129) ; 馬場 淳一 国立天文台, JASMINEプロジェクト, 特任助教 (90569914)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000); Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
• Keywords: 脈動変光星 / 天の川銀河 / 恒星化学組成 / 高分散分光観測 / 渦巻き腕

Outline of Final Research Achievements

We used the multi-dimensional data of Cepheid variable stars in order to study the evolution of the Galactic disk. While the distances and thus the positions of Cepheids can be well determined by the period-luminosity relation, the new data releases of the Gaia satellite allowed us to determine the three dimensional velocities and trace the dynamical properties of the Galactic disk. On the other hand, we established the method and basic database necessary for measuring the chemical abundances of Cepheids based on near-infrared spectra, which are less affected by interstellar extinction strong in the Galactic disk. Moreover, we made the first observations with the world-leading WINERED near-infrared spectrograph attached to Magellan telescope at the Las Campanas Observatory. Its high sensitivity combined with our method of chemical analysis for Cepheids would enable to extend the sample of Cepheids with multi-dimensional data for covering the entire range of the Galactic disk.

Academic Significance and Societal Importance of the Research Achievements

銀河系(天の川銀河)は我々の太陽系が所属する身近な銀河である。本研究では、高精度の距離測定が可能なセファイド変光星をターゲットとし、星間物質の吸収の影響が小さい近赤外線での分光観測というツールを用いることで、銀河系中の広い範囲における星の位置・運動・化学組成を観測的に調べる手法を確立した。セファイドは年齢が1億年程度と若く、銀河系進化の歴史の中ではごく最近生まれた星である。本研究の成果を今後応用することにより、銀河系がどのような進化を経て現在のような姿になったのかを探ることができる。

Research Products

• [Int'l Joint Research] ローマ大学トルベルガータ校(イタリア)
• [Int'l Joint Research] カーネギー天文台(米国)
• [Int'l Joint Research] ユニバーシティ・カレッジ・ロンドン(英国)
• [Int'l Joint Research] ローマ大学トルベルガータ校/パドヴァ天文台(イタリア)
• [Int'l Joint Research] 北京大学/中国科学院国家天文台(中国)
• [Int'l Joint Research] カーネギー天文台(米国)
• [Int'l Joint Research] ユニバーシティ・カレッジ・ロンドン(英国)
• [Int'l Joint Research] 南アフリカ天文台(南アフリカ)
• [Int'l Joint Research] ローマ大学トルベルガータ校/パドヴァ天文台(INAF)(イタリア)
• [Int'l Joint Research] 北京大学/中国科学院国家天文台(中国)
• [Int'l Joint Research] カーネギー天文台(米国)
• [Journal Article] A Very Metal-poor RR Lyrae Star with a Disk Orbit Found in the Solar Neighborhood (2022)
  • Author(s): Matsunaga、Itane、Hattori、Crestani、Braga、Bono、Taniguchi、Baba、Maehara、Ukita、Sakamoto、Kobayashi、Aoki、Soyano、Tarusawa、Sarugaku、Mito、Sako、Doi、Nakada、Izumi、Ita、Onozato、Jian、Kondo、Hamano、Yasui、Tsujimoto、Otsubo、Ikeda、Kawakita
  • Journal Title: The Astrophysical Journal Volume: 925 Issue: 1 Pages: 10-10
  • DOI: 10.3847/1538-4357/ac3483
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Age distribution of stars in boxy/peanut/X-shaped bulges formed without bar buckling (2022)
  • Author(s): Baba Junichi、Kawata Daisuke、Schenrich Ralph
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 513 Issue: 2 Pages: 2850-2861
  • DOI: 10.1093/mnras/stac598
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Line-depth ratios as indicators of effective temperature and surface gravity (2021)
  • Author(s): Matsunaga Noriyuki、Jian Mingjie、Taniguchi Daisuke、Elgueta Scarlet S
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 506 Issue: 1 Pages: 1031-1044
  • DOI: 10.1093/mnras/stab1770
  • Peer Reviewed / Open Access
• [Journal Article] Absorption Lines in the 0.91?1.33 μm Spectra of Red Giants for Measuring Abundances of Mg, Si, Ca, Ti, Cr, and Ni (2021)
  • Author(s): Fukue Kei、Matsunaga Noriyuki、Kondo Sohei、Taniguchi Daisuke、Ikeda Yuji、Kobayashi Naoto、Sameshima Hiroaki、Hamano Satoshi、Arai Akira、Kawakita Hideyo、Yasui Chikako、Mizumoto Misaki、Otsubo Shogo、Takenaka Keiichi、Yoshikawa Tomohiro、Tsujimoto Takuji
  • Journal Title: The Astrophysical Journal Volume: 913 Issue: 1 Pages: 62-62
  • DOI: 10.3847/1538-4357/abf0b1
  • Peer Reviewed / Open Access
• [Journal Article] Effective temperatures of red supergiants estimated from line-depth ratios of iron lines in the YJ bands, 0.97-1.32μm (2021)
  • Author(s): Taniguchi Daisuke、Matsunaga Noriyuki、Jian Mingjie、Kobayashi Naoto、Fukue Kei、Hamano Satoshi、Ikeda Yuji、Kawakita Hideyo、Kondo Sohei、Otsubo Shogo、Sameshima Hiroaki、Takenaka Keiichi、Yasui Chikako
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 502 Issue: 3 Pages: 4210-4226
  • DOI: 10.1093/mnras/staa3855
  • Peer Reviewed
• [Journal Article] A Parametric Galactic Model toward the Galactic Bulge Based on Gaia and Microlensing Data (2021)
  • Author(s): Koshimoto Naoki、Baba Junichi、Bennett David P.
  • Journal Title: The Astrophysical Journal Volume: 917 Issue: 2 Pages: 78-78
  • DOI: 10.3847/1538-4357/ac07a8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The effect of surface gravity on line-depth ratios in the wavelength range 0.97?1.32?μm (2020)
  • Author(s): Jian Mingjie、Taniguchi Daisuke、Matsunaga Noriyuki、Kobayashi Naoto、Ikeda Yuji、Yasui Chikako、Kondo Sohei、Sameshima Hiroaki、Hamano Satoshi、Fukue Kei、Arai Akira、Otsubo Shogo、Kawakita Hideyo
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 494 Issue: 2 Pages: 1724-1734
  • DOI: 10.1093/mnras/staa834
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Remarkable Migration of the Solar System from the Innermost Galactic Disk; a Wander, a Wobble, and a Climate Catastrophe on the Earth (2020)
  • Author(s): Tsujimoto Takuji、Baba Junichi
  • Journal Title: The Astrophysical Journal Volume: 904 Issue: 2 Pages: 137-137
  • DOI: 10.3847/1538-4357/abc00a
  • Peer Reviewed / Open Access
• [Journal Article] Identification of Absorption Lines of Heavy Metals in the Wavelength Range 0.97-1.32 μm (2020)
  • Author(s): Matsunaga Noriyuki、Taniguchi Daisuke、Jian Mingjie、Ikeda Yuji、Fukue Kei、Kondo Sohei、Hamano Satoshi、Kawakita Hideyo、Kobayashi Naoto、Otsubo Shogo、Sameshima Hiroaki、Takenaka Keiichi、Tsujimoto Takuji、Watase Ayaka、Yasui Chikako、Yoshikawa Tomohiro
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 246 Issue: 1 Pages: 10-10
  • DOI: 10.3847/1538-4365/ab5c25
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The 3D Distribution of Long-period Mira Variables in the Galactic Disk (2020)
  • Author(s): Urago Riku、Omodaka Toshihiro、Nagayama Takahiro、Watabe YuKi、Miyanosita Ryo、Matsunaga Noriyuki、Burns Ross A.
  • Journal Title: The Astrophysical Journal Volume: 891 Issue: 1 Pages: 50-50
  • DOI: 10.3847/1538-4357/ab70b1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Age dating the Galactic bar with the nuclear stellar disc (2020)
  • Author(s): Baba Junichi、Kawata Daisuke
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 492 Issue: 3 Pages: 4500-4511
  • DOI: 10.1093/mnras/staa140
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fe I Lines in 0.91-1.33 μm Spectra of Red Giants for Measuring the Microturbulence and Metallicities (2019)
  • Author(s): Kondo Sohei、Fukue Kei、Matsunaga Noriyuki、Ikeda Yuji、Taniguchi Daisuke、Kobayashi Naoto、Sameshima Hiroaki、Hamano Satoshi、Arai Akira、Kawakita Hideyo、Yasui Chikako、Izumi Natsuko、Mizumoto Misaki、Otsubo Shogo、Takenaka Keiichi、Watase Ayaka、Asano Akira、Yoshikawa Tomohiro、Tsujimoto Takuji
  • Journal Title: The Astrophysical Journal Volume: 875 Issue: 2 Pages: 129-129
  • DOI: 10.3847/1538-4357/ab0ec4
  • Peer Reviewed / Open Access
• [Journal Article] Stellar Overdensity in the Local Arm in Gaia DR2 (2019)
  • Author(s): Miyachi, Yusuke; Sakai, Nobuyuki; Kawata, Daisuke; Baba, Junichi; Honma, Mareki; Matsunaga, Noriyuki; Fujisawa, Kenta
  • Journal Title: The Astrophysical Journal Volume: 882 Issue: 1 Pages: 48-56
  • DOI: 10.3847/1538-4357/ab2f86
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First Detection of A-X (0,0) Bands of Interstellar C2 and CN (2019)
  • Author(s): Hamano Satoshi、Kawakita Hideyo、Kobayashi Naoto、Takenaka Keiichi、Ikeda Yuji、Matsunaga Noriyuki、Kondo Sohei、Sameshima Hiroaki、Fukue Kei、Yasui Chikako、Mizumoto Misaki、Otsubo Shogo、Watase Ayaka、Yoshikawa Tomohiro、Kobayashi Hitomi
  • Journal Title: The Astrophysical Journal Volume: 881 Issue: 2 Pages: 143-143
  • DOI: 10.3847/1538-4357/ab2e0f
  • Peer Reviewed
• [Journal Article] Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. II. ω Centauri (2019)
  • Author(s): Magurno D.、Sneden C.、Bono G.、Braga V. F.、Mateo M.、Persson S. E.、Preston G.、Th?venin F.、Silva R. da、Dall’Ora M.、Fabrizio M.、Ferraro I.、Fiorentino G.、Iannicola G.、Inno L.、Marengo M.、Marinoni S.、Marrese P. M.、Mart?nez-V?zquez C. E.、Matsunaga N.、Monelli M.、Neeley J. R.、Nonino M.、Walker A. R.
  • Journal Title: The Astrophysical Journal Volume: 881 Issue: 2 Pages: 104-104
  • DOI: 10.3847/1538-4357/ab2e76
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The metallicity effect on line-depth ratios in APOGEE H-band spectra (2019)
  • Author(s): Jian Mingjie、Matsunaga Noriyuki、Fukue Kei
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 485 Issue: 1 Pages: 1310-1319
  • DOI: 10.1093/mnras/stz237
  • Peer Reviewed / Open Access
• [Journal Article] Galactic r-process Abundance Feature Shaped by Radial Migration (2019)
  • Author(s): Tsujimoto, Takuji; Baba, Junichi
  • Journal Title: The Astrophysical Journal Volume: 878 Issue: 2 Pages: 125-133
  • DOI: 10.3847/1538-4357/ab22b3
  • Peer Reviewed / Open Access
• [Journal Article] Variable Stars in Terzan 5: Additional Evidence of Multi-age and Multi-iron Stellar Populations (2019)
  • Author(s): Origlia L.、Mucciarelli A.、Fiorentino G.、Ferraro F. R.、Dalessandro E.、Lanzoni B.、Rich R. M.、Massari D.、Contreras Ramos R.、Matsunaga N.
  • Journal Title: The Astrophysical Journal Volume: 871 Issue: 1 Pages: 114-114
  • DOI: 10.3847/1538-4357/aaf730
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Correction of Near-infrared High-resolution Spectra for Telluric Absorption at 0.90-1.35 μm (2018)
  • Author(s): Sameshima, H., Matsunaga, N., Kobayashi, N., Kawakita, H., Hamano, S., Ikeda, Y., Kondo, S., Fukue, K., Taniguchi, D., Mizumoto, M., Arai, A., Otsubo, S., Takenaka, K., Watase, A., Asano, A., Yasui, C., Izumi, N., Yoshikawa, T.
  • Journal Title: Publications of the Astronomical Society of the Pacific Volume: 989 Issue: 989 Pages: 074502-074502
  • DOI: 10.1088/1538-3873/aac1b4
  • Peer Reviewed
• [Journal Article] A new and homogeneous metallicity scale for Galactic classical Cepheids (2018)
  • Author(s): Proxauf B.、da Silva R.、Kovtyukh V. V.、Bono G.、Inno L.、Lemasle B.、Pritchard J.、Przybilla N.、Storm J.、Urbaneja M. A.、Valenti E.、Bergemann M.、Buonanno R.、D’Orazi V.、Fabrizio M.、Ferraro I.、Fiorentino G.、Fran?ois P.、Iannicola G.、Laney C. D.、Kudritzki R.-P.、Matsunaga N.、and others
  • Journal Title: Astronomy & Astrophysics Volume: 616 Pages: A82-A82
  • DOI: 10.1051/0004-6361/201833087
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A newly identified emission-line region around P Cygni (2018)
  • Author(s): Mizumoto, M., Kobayashi, N., Hamano, S., Ikeda, Y., Kondo, S., Sameshima, H., Matsunaga, N., Fukue, K., Yasui, C., Izumi, N., Kawakita, H., Nakanishi, K., Nakaoka, T., Otsubo, S., & Maehara, H.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 481 Issue: 1 Pages: 793-805
  • DOI: 10.1093/mnras/sty2239
  • Peer Reviewed
• [Journal Article] A near infrared variable star survey in the Magellanic Clouds: The Small Magellanic Cloud data (2018)
  • Author(s): Ita Yoshifusa、Matsunaga Noriyuki、Tanabe Toshihiko、Nakada Yoshikazu、Kato Daisuke、Nagayama Takahiro、Nagashima Chie、Kurita Mikio、Nakajima Yasushi、Whitelock Patricia A、Menzies John W、Feast Michael W、Nagata Tetsuya、Tamura Motohide、Nakaya Hidehiko
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 481 Pages: 4206-4220
  • DOI: 10.1093/mnras/sty2539
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] WINERED High-resolution Near-infrared Line Catalog: A-type Star (2018)
  • Author(s): Sameshima Hiroaki、Ikeda Yuji、Matsunaga Noriyuki、Fukue Kei、Kobayashi Naoto、Kondo Sohei、Hamano Satoshi、Kawakita Hideyo、Yasui Chikako、Izumi Natsuko、Mizumoto Misaki、Otsubo Shogo、Takenaka Keiichi、Watase Ayaka、Asano Akira、Yoshikawa Tomohiro
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 239 Issue: 2 Pages: 19-19
  • DOI: 10.3847/1538-4365/aae924
  • Peer Reviewed
• [Journal Article] Galactic rotation from Cepheids with Gaia DR2 and effects of non-axisymmetry (2018)
  • Author(s): Kawata Daisuke、Bovy Jo、Matsunaga Noriyuki、Baba Junichi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 482 Issue: 1 Pages: 40-51
  • DOI: 10.1093/mnras/sty2623
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First metallicity determination from near-infrared spectra for five obscured Cepheids discovered in the inner disc (2018)
  • Author(s): Inno L、Urbaneja M A、Matsunaga N、Bono G、Nonino M、Debattista V P、Sormani M C、Bergemann M、da?Silva R、Lemasle B、Romaniello M、Rix H-W
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 482 Issue: 1 Pages: 83-97
  • DOI: 10.1093/mnras/sty2661
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Luminous AGB variables in the dwarf irregular galaxy, NGC 3109 (2018)
  • Author(s): Menzies John W、Whitelock Patricia A、Feast Michael W、Matsunaga Noriyuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 483 Issue: 4 Pages: 5150-5165
  • DOI: 10.1093/mnras/sty3438
  • Peer Reviewed / Int'l Joint Research
• [Presentation] The near-infrared spectrograph, WINERED, starting observations at Las Campanas Observatory (2022)
  • Author(s): Noriyuki Matsunaga
  • Organizer: Chile-Japan Academic Forum 2022
  • Int'l Joint Research
• [Presentation] Pulsating stars in the Milky Way: IRSF surveys and more (2022)
  • Author(s): Noriyuki Matsunaga
  • Organizer: The Workshop on Infrared Astronomy with the Infrared Survey Facility
  • Int'l Joint Research
• [Presentation] Setting the stages of NIR spectroscopy for a bird's-eye view of the Milky Way disk (2022)
  • Author(s): Noriyuki Matsunaga
  • Organizer: Linking the Galactic and Extragalactic
  • Int'l Joint Research
• [Presentation] セファイド変光星を用いるリン元素の進化の観測的研究に向けて (2022)
  • Author(s): 松永典之
  • Organizer: 天の川銀河研究会2022
• [Presentation] セファイド変光星の近赤外線校分散分光観測によるリン元素組成の研究 (2022)
  • Author(s): 松永典之
  • Organizer: 連星系・変光星研究会2022
• [Presentation] Near-IR windows of precise and detailed chemical measurements (2019)
  • Author(s): Noriyuki Matsunaga
  • Organizer: Subaru Telescope 20th Anniversary Workshop
  • Int'l Joint Research
• [Presentation] ELTs for complex stellar populations around the Galactic Center (2018)
  • Author(s): Noriyuki Matsunaga
  • Organizer: IAU Symposium 347 "EArly Science with ELTs (EASE)"
  • Int'l Joint Research / Invited
• [Presentation] Cepheids as tracers of the Milky Way in the era of Gaia (2018)
  • Author(s): Noriyuki Matsunaga
  • Organizer: The life and times of the Milky Way
  • Int'l Joint Research
• [Presentation] Interstllar extinction toward the Galactic bulge (2018)
  • Author(s): Noriyuki Matsunaga
  • Organizer: The Galactic Bulge at the crossroads
  • Int'l Joint Research / Invited
• [Remarks] 太った星の体温測定
  • URL: https://www.s.u-tokyo.ac.jp/ja/info/7248/
• [Remarks] 宇宙の錬金術を観察するためのカギを赤外線域で発見
  • URL: https://www.s.u-tokyo.ac.jp/ja/info/6668/
• [Remarks] 宇宙の錬金術を観察するためのカギを赤外線域で発見
  • URL: https://www.nao.ac.jp/news/science/2020/20200109-jasmine.html
• [Remarks] 宇宙の錬金術を観察するためのカギを赤外線域で発見
  • URL: https://www.kyoto-su.ac.jp/news/20200109_859_winered.html
• [Remarks] 死にゆく大質量星が星のごく近くに作る衝撃波を発見
  • URL: https://www.s.u-tokyo.ac.jp/ja/press/2018/6040/