Study of Chemical Evolution of Dwarf Galaxies

• Project/Area Number: 19540240
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Osaka Kyoiku University
• Principal Investigator: SADAKANE Kozo Osaka Kyoiku University, 教育学部, 教授 (20110794)
• Project Period (FY): 2007 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2007: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 恒星分光学 / 化学組成 / 銀河系進化 / わい小銀河 / 化学進化 / 高分散分光 / 天文学 / 天文 / 矮小銀河

Research Abstract

High resolution spectroscopic observations of red giants stars belonging to several dwarf galaxies were carried out using the SUBARU telescope and a 8m telescope at European Southern Observatory (ESO). Chemical compositions of these red giant stars were obtained and compared with Galactic metal deficient RGB stars, which were formed more than 10 billion years ago. Several important information concerning the formation process of our Galaxy were obtained from these comparisons.

Research Products

• [Journal Article] Enrichment of Heavy Elements in the red giant S15-19 in the Sextans Dwarf Spheroidal Galaxy (2011)
  • Author(s): Honda, S., Aoki, W., Arimoto, N., Sadakane, K.
  • Journal Title: PASJ Vol., 63
  • NAID: 10029039157
• [Journal Article] Enrichment of Heavy Elements in the red giant S15-19 in the Sextans Dwarf Spheroidal Galaxy (2011)
  • Author(s): Honda, S., et al.
  • Journal Title: PASJ Volume: 63
  • Peer Reviewed
• [Journal Article] An Abundance Analysis of the Primary Star of the Peculiar Eclipsing Binary ε Aur out of the Eclipsing Phase (2010)
  • Author(s): Sadakane, K., Kambe, E., Sato, B., Honda, S., Hashimoto, O
  • Journal Title: PASJ Vol., 62 Pages: 1381-1390
• [Journal Article] A High-Resolution VLT/FLAMES Study of Individual Stars in the Centre of the Fornax Dwarf Spheroidal Galaxy (2010)
  • Author(s): Latarte, B., et al.
  • Journal Title: A&A Vol., 523
• [Journal Article] Discovery of Multiple High-Velocity Narrow Circumstellar NaI D Lines in Nova V1280 Sco (2010)
  • Author(s): Sadakane, K., Tajitsu, A., Mizoguchi, S., Arai, A., Naito, H.
  • Journal Title: PASJ Vol., 62
  • NAID: 10026713665
• [Journal Article] An Abundance Analysis of the Primary Star of the Peculiar Eclipsing Binary ε Aurigae out of the Eclipsing Phase (2010)
  • Author(s): Sadakane, K., et al.
  • Journal Title: PASJ Volume: 62 Pages: 1381-1390
  • NAID: 10029326260
  • Peer Reviewed
• [Journal Article] A high-resolution VLT/FLAMES study of individual stars in the centre of the Fornax dwarf spheroidal galaxy (2010)
  • Author(s): Letarte, B., et al.
  • Journal Title: A&A Volume: 523
  • Peer Reviewed
• [Journal Article] Chemical Composition of Extremely Metal-Poor Stars in the Sextans Dwarf Spheroidai Galaxy (2009)
  • Author(s): Aoki, W., et al.
  • Journal Title: A&A Vol.,502 Pages: 569-578
• [Journal Article] Chemical composition of extremely metal-poor stars in the Sextans dwarf spheroidal galaxy (2009)
  • Author(s): Aoki, W., Arimoto, N., Sadakane, K., Tolstoy, E., Battaglia, G., Jablonka, P., Shetrone, M., Letarte, B., Irwin, M., Hill, V., et al.
  • Journal Title: A&A 502 Pages: 569-578
  • Peer Reviewed
• [Journal Article] he New Detections of 7Li/6Li Isotopic Ratio in the Interstellar Media (2009)
  • Author(s): Kawanomoto, S.,Kajino, T., Aoki, W., Bessell, M., Suzuki, T. K,; Ando, H., Noguchi, K., Honda, S., Izumiura, H., Kambe, E., Sadakane, K., et al.
  • Journal Title: ApJ 701 Pages: 1506-1518
  • Peer Reviewed
• [Journal Article] The New Detection of 7Li/6Li Isotopic Ratio in the Interstellar Media (2009)
  • Author(s): Kawanomoto, S., et al.
  • Journal Title: ApJ 701 Pages: 1506-1518
  • Peer Reviewed
• [Journal Article] Chemical Composition of Extremely Metal-Poor Stars in the Sextans Dwarf Spheroidal Galaxy (2009)
  • Author(s): Aoki, W., et al.
  • Journal Title: AA 502 Pages: 569-578
  • Peer Reviewed
• [Journal Article] Tidally Induced Outbursts in OJ 287 during 2005-2008 (2009)
  • Author(s): Valtonen, M.J., et al.
  • Journal Title: ApJ 698 Pages: 781-785
  • Peer Reviewed
• [Journal Article] Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007 (2008)
  • Author(s): Larionov, V. M., et al.
  • Journal Title: Astronomy and Astrophysics 492 Pages: 389400-389400
  • Peer Reviewed
• [Journal Article] The 2006 November Outburst of EG Aquarii : the su UMa Nature Revealed (2008)
  • Author(s): Imada, A., et al.
  • Journal Title: PASJ 60 Pages: 11511158-11511158
  • Peer Reviewed
• [Journal Article] Evidence for a Companion to BM Gem, a Silicate Carbon star (2008)
  • Author(s): Izumiura, H., et al.
  • Journal Title: ApJ 682 Pages: 499508-499508
  • Peer Reviewed
• [Journal Article] A massive binary black-hole system in 0J287 and a test of general relativity (2008)
  • Author(s): Valtonen, M. J., et al.
  • Journal Title: Nature 452 Pages: 851853-851853
  • Peer Reviewed
• [Journal Article] First Determination of the Actinide Thorium Abundance for a Red Giant of the Ursa Minor Dwarf Galaxy (2007)
  • Author(s): Aoki, W., Honda, S., Sadakane, K., Arimoto, N.
  • Journal Title: PASJ Vol., 59
  • NAID: 10023945656
• [Journal Article] Nobuo First Determination of the Actinide Thorium Abundance for a Red Giant of the Ursa Minor Dwarf Galaxy (2007)
  • Author(s): Aoki, Wako, Honda, Satoshi, Sadakane, Kozo, Arimoto
  • Journal Title: PASJ 59
  • Peer Reviewed
• [Journal Article] Dramatic Spectral and Photometric Changes of Pleione(28 Tau) between 2005 November and 2007 April (2007)
  • Author(s): Tanaka, K.; Sadakane, K.; Narusawa, S.-Y.; Naito, H.; Kambe, E.; Katahira, J.; Hirata, R
  • Journal Title: PASJ 59
  • NAID: 10023946263
  • Peer Reviewed
• [Journal Article] First Determination of the Actinide Thorium Abundance for a Red Giant of the Ursa Minor Dwarf Galaxy (2007)
  • Author(s): Aoki, Wako; Honda, Satoshi; Sadakane, Kozo; Arimoto, Nobuo
  • Journal Title: PASJ 59
  • NAID: 10023945656
  • Peer Reviewed
• [Journal Article] The WEBT Campaign on the Blazar 3C 279 in 2006 (2007)
  • Author(s): Bottcher, M., et. al.
  • Journal Title: ApJ 670 Pages: 968-977
  • Peer Reviewed
• [Presentation] 新星V1280 Sco の高分散分光観測 (2009)
  • Author(s): 定金晃三
  • Organizer: 日本天文学会 2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-14
• [Presentation] わい小銀河の超低金属星の化学組成 (2009)
  • Author(s): 青木和光、有本信雄、定金晃三
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-25
• [Presentation] わい小銀河の超金属欠乏星の観測 (2007)
  • Author(s): 定金晃三
  • Organizer: 日本天文学会2007年秋季年会
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-28
• [Presentation] 矮小銀河の超金属欠乏星の観測 (2007)
  • Author(s): 定金晃三
  • Organizer: 日本天文学会 2007年秋期年会 (企画セッション:第一世代天体の形成)
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-28
• [Book] シリーズ 現代の天文学、第7巻、『恒星』 (2009)
  • Author(s): 野本憲一, 定金晃三, 佐藤勝彦, 共編
  • Total Pages: 365
  • Publisher: 日本評論社
• [Book] シリーズ 現代の天文学 第7巻 恒星 (2009)
  • Author(s): 野本憲一, 定金晃三, 佐藤勝彦, 他
  • Total Pages: 365
  • Publisher: 日本評論社
• [Book] 日本の天文学の百年 (2008)
  • Author(s): 日本天文学会百年史編纂委員会(共著)
  • Total Pages: 341
  • Publisher: 恒星社厚生閣