Unveiling the evolution of Lyman continuum galaxies with ultra-wide and deep survey

2015 Fiscal Year Final Research Report

• Project/Area Number: 24244018
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: Iwata Ikuru 国立天文台, ハワイ観測所, 准教授 (40399275)
• Co-Investigator(Renkei-kenkyūsha): INOUE Akio 大阪産業大学, 准教授 (30411424) ; SHIMASAKU Kazuhiro 東京大学, 理学研究科, 准教授 (00251405) ; OUCHI Masami 東京大学, 宇宙線研究所, 准教授 (40595716)
• Research Collaborator: Genoveva Micheva 国立天文台, ハワイ観測所, RCUH職員
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 銀河天文学 / 光赤外線天文学 / 宇宙再電離

Outline of Final Research Achievements

In order to disclose the escape fraction of Lyman continuum (LyC) from distant galaxies, we fabricated a special narrow-band filter for Subaru Telescope Hyper Suprime-Cam (HSC). Our plan was to carry out multiple narrow-band imaging observations to select star-forming galaxies at redshift around 3 and 5 and also to directly detect LyC from them. While the fabrication of the filter was completed successfully, the HSC observation was delayed and we could not conduct the planned LyC observation in time. On the other hand, we conducted search for LyC emitting galaxies using Subaru Suprime-Cam and the follow-up observations of the candidates, and revealed the existence of galaxies and active galactic nuclei with very strong LyC emission.

Free Research Field

銀河天文学