Study on the metal enrichment history in the Universe

2012 Fiscal Year Final Research Report

• Project/Area Number: 22740123
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: Nagasaki University
• Principal Investigator: NAGASHIMA Masahiro 長崎大学, 教育学部, 准教授 (20342628)
• Project Period (FY): 2010 – 2012
• Keywords: 理論天文学 / 宇宙物理学 / 銀河形成論

Research Abstract

We analyzed many types of galaxies by using the semi-analytic galaxy formation model based on the cold dark matter model that is the currently standard cosmological model.In particular, we investigate the evolution of active galactic nuclei that have central supre-massive black holes as the engine of the activity and the relationship between surrounding galaxies and them. Also, we investigated the relationship between the star formation activity and the infrared radiation from dust, which is made of hevy elements, by modifying the star formation model in the semi-analytic galaxy formation model.

Research Products

• [Journal Article] Infrared Spectral Energy Distribution of Galaxies in the Akari all Sky Survey: Correlations with Galaxy Properties and Their Physical Origin (2012)
  • Author(s): Ryu Makiya,Tomonori Totani, Tsutomu T. Takeuchi, Masahiro Nagashima, & Masakazu A.R. Kobayashi
  • Journal Title: Publ. Korean Astron. Soc Volume: Vol. 27 Pages: 325-329
  • DOI: DOI:10.5303/PKAS.2012.27.4.325
• [Journal Article] Infrared Spectral Energy Distribution of Galaxies in the AKARI All Sky Survey: Correlations with Galaxy Properties, and Their Physical Origin (2011)
  • Author(s): Tomonori Totani, Tsutomu T. Takeuchi,Masahiro Nagashima, Masakazu A.R. Kobayashi, & Ryu Makiya
  • Journal Title: Publ. Astron. Soc. Japan Volume: Vol. 63 Pages: 1181-1206
  • URL: http://pasj.asj.or.jp/v63/n6/630613/630613-frame.html
  • Peer Reviewed
• [Journal Article] LY-ALPHA EMITTERS AT Z = 7 IN THE SUBARU/XMM-NEWTON DEEP SURVEY FIELD: PHOTOMETRIC CANDIDATES AND LUMINOSITY FUNCTIONS (2010)
  • Author(s): Kazuaki Ota, Masanori Iye, Nobunari Kashikawa, Kazuhiro Shimasaku, Masami Ouchi, Tomonori Totani, Masakazu A. R. Kobayashi, Masahiro Nagashima, Atsushi Harayama, Natsuki Kodaka, Tomoki Morokuma, Hisanori Furusawa, Akito Tajitsu, Takashi Hattori
  • Journal Title: Astrophys. J Volume: 722 Pages: 803-811
  • DOI: DOI:10.1088/0004-637X/722/1/803
  • Peer Reviewed
• [Presentation] Galaxy Formation in the CDM Universe (2012)
  • Author(s): Masahiro Nagashima
  • Organizer: in Galaxies: Origin, Dynamics, Structure
  • Place of Presentation: Sochi, Russia
  • Year and Date: 20120514-18
• [Presentation] Infrared Spectral Energy Distribution of Galaxies in the Akari all Sky Survey: Correlations with Galaxy Properties and Their Physical Origin (2012)
  • Author(s): Ryu Makiya, Tomonori Totani, Tstutomu T. Takeuchi, Masahiro Nagashima & Masakazu A.R. Kobayashi
  • Organizer: in The Second AKARI Conference: Legacy of AKARI: A Panoramic View of the Dusty Universe
  • Place of Presentation: Ramada Plaza Hotel, Jeju, KOREA
  • Year and Date: 20120227-29
• [Presentation] Prospects of the semi-analytic model of galaxy formation (2012)
  • Author(s): Masahiro Nagashima
  • Organizer: in Supermassive Black Holes in the Universe: The Era of the HSC Surveys
  • Place of Presentation: Ehime University, Matsuyama, Ehime
  • Year and Date: 2012-12-20
• [Presentation] AGNの個数密度の反階層的進化と階層的銀河形成 (2012)
  • Author(s): 榎 基宏, 石山 智明, 小林 正和, 長島 雅裕
  • Organizer: 日本天文学会、大分大学
  • Place of Presentation: 大分県大分市
  • Year and Date: 2012-09-20
• [Presentation] Metal abundances in dwarf spheroidals in the CDM Universe (2011)
  • Author(s): Masahiro Nagashima, Takashi Okamoto
  • Organizer: in 11th Asian-Pacific Regional IAU Meeting
  • Place of Presentation: Chiang Mai, Thailand
  • Year and Date: 20110726-29
• [Presentation] 準解析的銀河・QSO形成ハイブリッドモデルの構築 (2011)
  • Author(s): 榎基宏、石山智明、小林正和、長島雅裕、矢作日出樹
  • Organizer: 日本天文学会
  • Place of Presentation: 筑波大学(茨城県つくば市)
  • Year and Date: 2011-03-19