The formation and evolution of nearby galaxies studied with Hyper Suprime-Cam on the Subaru Telescope

• Project/Area Number: 15K05037
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: Komiyama Yutaka 国立天文台, ハワイ観測所, 助教 (20370108)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 画像処理 / 近傍銀河 / 銀河天文学 / 天体画像処理 / 画像解析

Outline of Final Research Achievements

The data analysis procedure which is optimized for the studies of nearby galaxies using Hyper Suprime-Cam on the Subaru Telescope is investigated. The key points in the data analysis which are specific to the analysis of nearby galaxies include (1) the subtraction of background light, (2) stellar photometry in crowded fields, and (3) the reduction of ghosts in the image due to reflections of telescope optics. Based on the optimized data analysis procedure, the formation and evolution of nearby galaxies is studied in detail from new points of view: that are the detailed study of stellar stream in the halo of Andromeda galaxy and the estimate of binary fraction in Ursa Minor dwarf spheroidal galaxy.

Research Products

• [Int'l Joint Research] Princeton University/University of California/Space Telescope Science Institute(米国)
• [Int'l Joint Research] Seoul National University(韓国)
• [Int'l Joint Research] University of Sydney(オーストラリア)
• [Journal Article] Stellar Stream and Halo Structure in the Andromeda Galaxy from a Subaru/Hyper Suprime-Cam Survey (2018)
  • Author(s): Komiyama, Yutaka; Chiba, Masashi; Tanaka, Mikito; Tanaka, Masayuki; Kirihara, Takanobu; Miki, Yohei; Mori, Masao; Lupton, Robert H.; Guhathakurta, Puragra; Kalirai, Jason S.; Gilbert, Karoline; Kirby, Evan; Lee, Myun Gyoon; Jang, In Sung; Sharma, Sanjib; Hayashi, Kohei
  • Journal Title: The Astrophysical Journal Volume: 853 Issue: 1 Pages: 29-51
  • DOI: 10.3847/1538-4357/aaa129
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Resolved Stellar Streams around NGC 4631 from a Subaru/Hyper Suprime-Cam Survey (2017)
  • Author(s): Tanaka Mikito、Chiba Masashi、Komiyama Yutaka
  • Journal Title: Astrophysical Journal Volume: 842 Issue: 2 Pages: 127-127
  • DOI: 10.3847/1538-4357/aa6d11
  • Peer Reviewed / Open Access
• [Presentation] Hyper Suprime-Cam で探るアンドロメダ銀河の恒星ストリームとハロー構造 (2018)
  • Author(s): 小宮山裕, 千葉柾司, 田中幹人, 田中賢幸, 桐原崇亘, 三木洋平, 森正夫, Lupton, R. H., Guhathakurta, P., Kalirai, J. S., Gilbert, K., Kirby, E., Lee, M. G., Jang, I. S., Sharma, S., 林航平
  • Organizer: 日本天文学会春季年会
• [Presentation] HSC 画像からの自動ゴースト除去 (II) (2017)
  • Author(s): 小宮山裕, 川野元聡, 八木雅文
  • Organizer: 日本天文学会
  • Place of Presentation: 九州大学(福岡県・福岡市)
  • Year and Date: 2017-03-15
• [Presentation] Binary Fraction from Hyper Suprime-Cam Deep Imaging Survey for the Local Group Dwarf Galaxies (2017)
  • Author(s): Yutaka Komiyama
  • Organizer: THE IMPACT OF BINARIES ON STELLAR EVOLUTION
  • Int'l Joint Research
• [Presentation] HSC Wide and Deep Imaging Survey for the MilkyWay Satellite Galaxies (2017)
  • Author(s): Yutaka Komiyama
  • Organizer: IAU Symposium 334 Rediscovering Our Galaxy
  • Int'l Joint Research
• [Presentation] HSC 近傍銀河データの PSF 測光 (2017)
  • Author(s): 小宮山 裕
  • Organizer: 日本天文学会秋季年会
• [Presentation] Subaru Hyper Suprime-Cam Survey for Local Group Dwarf Galaxies (2016)
  • Author(s): Yutaka Komiyama
  • Organizer: Panoramas of the Evolving Cosmos, The 6th Subaru International Conference
  • Place of Presentation: International Conference Center Hiroshima(広島県・広島市)
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] HSC 画像からの自動ゴースト除去 (2016)
  • Author(s): 小宮山裕, 八木雅文
  • Organizer: 日本天文学会
  • Place of Presentation: 愛媛大学(愛媛県・松山市)
  • Year and Date: 2016-09-14
• [Presentation] HSC 大規模画像データの PSF 測光 (2015)
  • Author(s): 小宮山 裕
  • Organizer: 日本天文学会
  • Place of Presentation: 甲南大学(兵庫県神戸市)
  • Year and Date: 2015-09-09
• [Remarks] 観測成果：クジラ銀河には化石がいっぱい
  • URL: https://www.naoj.org/Pressrelease/2017/08/02/j_index.html