Probing the mass-assembly history of star-forming galaxies using Subaru laser guide star adaptive optics system

• Project/Area Number: 25800117
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: Minowa Yosuke 国立天文台, ハワイ観測所, 助教 (60450194)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 銀河進化 / 銀河形成 / 補償光学 / 光赤外線天文学 / 光学赤外線天文学

Outline of Final Research Achievements

The main purpose of this research is to shed new light on the histories of galaxy assembly by obtaining spatially-resolved mapping of star-formation activities within distant galaxies at redshift ~ 2, which corresponds to about 10 billion years ago. For this specific purpose, we developed new infrared narrow-band filters whose central wavelength are adjusted to include Hα emission lines from star-forming galaxies at redshift ~ 2 and conducted high-resolution imaging observation using the adaptive optics system and infrared imager onboard the Subaru telescope. We have successfully spatially-resolve the star-forming region and obtained the maps of the stellar age and star-forming activities within the galaxies at redshift ~ 2. Our preliminary results show that the star-formation is more active at the outer clump rather than the central region in the star-forming galaxy.

Research Products

• [Journal Article] Near-infrared spectroscopy of quasars at z ~ 3 and estimates of their supermassive black hole masses (2016)
  • Author(s): Saito, Yuriko; Imanishi, Masatoshi; Minowa, Yosuke; Morokuma, Tomoki; Kawaguchi, Toshihiro; Sameshima, Hiroaki; Minezaki, Takeo; Oi, Nagisa; Nagao, Tohru; Kawatatu, Nozomu; Matsuoka, Kenta
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 1 Pages: 119-119
  • DOI: 10.1093/pasj/psv102
  • Peer Reviewed
• [Journal Article] Galaxy formation at z>3 revealed by narrow-band selected [OIII] emission line galaxies (2015)
  • Author(s): Tomoko Suzuki, Tadayuki Kodama, Ken-ichi Tadaki, Masao Hayashi, Yusei Koyama, Ichi Tanaka, Yosuke Minowa, Rhythm Shimakawa, Moegi Yamamoto
  • Journal Title: The Astrophysical Journal Volume: 806 Issue: 2 Pages: 208-217
  • DOI: 10.1088/0004-637x/806/2/208
  • Peer Reviewed
• [Journal Article] The Subaru Coronagraphic Extreme Adaptive Optics System: Enabling High-Contrast Imaging on Solar-System Scales (2015)
  • Author(s): N. Jovanovic, F. Martinache, O. Guyon, C. Clergeon, G. Singh, T. Kudo, V. Garrel, K. Newman, D. Doughty, J. Lozi, J. Males, Y. Minowa, Y. Hayano, N. Takato, J. Morino, J. Kuhn, E. Serabyn, B. Norris, P. Tuthill, G. Schworer, P. Stewart, L. Close, E. Huby, G. Perrin, S. Lacour, L. Gauchet, N. Murakami, F. Oshiyama
  • Journal Title: Publications of the Astronomical Society of Pacific Volume: 127 Issue: 955 Pages: 890-910
  • DOI: 10.1086/682989
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Instrument specifications and sensitivities (2014)
  • Author(s): Yosuke Minowa
  • Organizer: ULTIMATE-SUBARU (GLAO and Wide-field Near-IR instrument for Subaru) mini Science Workshop
  • Place of Presentation: 国立天文台（東京都）
  • Year and Date: 2014-07-28 – 2014-07-29
• [Presentation] ULTIMATE-Subaru: sensitivities and simulations of the observations of high- redshift galaxies (2014)
  • Author(s): Yosuke Minowa
  • Organizer: SPIE Astronomical Telescopes + Instrumentation 2014
  • Place of Presentation: Palais des congres de Montreal, Montreal, Quebec, Canada
  • Year and Date: 2014-06-22 – 2014-06-27
• [Presentation] Simulating observations of high-z galaxies with GLAO (2013)
  • Author(s): Yosuke Minowa
  • Organizer: Subaru GLAO Science Workshop
  • Place of Presentation: 北海道大学（札幌市）
• [Presentation] すばるGLAO計画について (2013)
  • Author(s): 美濃和陽典
  • Organizer: 円盤銀河の形成と進化研究会 2013
  • Place of Presentation: 国立天文台（三鷹市）