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| 題名: | Evolution of mid-infrared galaxy luminosity functions from the entire AKARI NEP deep field with new CFHT photometry |
| 作者: | 柯伊娜;Goto, Tomotsugu;Oi, Nagisa;Ohyama, Youichi;Malkan, Matthew;Matsuhara, Hideo;Wada, Takehiko;Karouzos, Marios;Im, Myungshin;Nakagawa, Takao;Buat, Veronique;Burgarella, Denis;Sedgwick, Chris;Toba, Yoshiki;Jeong, Woong-Seob;Marchetti, Lucia;Małek, Katarzyna;Koptelova, Ekaterina;Chao, Dani;Wu, Yi-Han;Pearson, Chris;Takagi, Toshinobu;Lee, Hyung Mok;Serjeant, Stephen;Takeuchi, Tsutomu T.;Kim, Seong Jin |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astrophysics;Density;Infrared;Infrared imaging systems;Luminosity;Optics;Photometry;Physics;Space telescopes;Spectral energy distribution;Spectrum analysis;Star & galaxy formation;Symbols;Uncertainty |
| 日期: | 2015-01-01 |
| 上傳時間: | 2026-04-21 14:29:13 (UTC+8) |
| 出版者: | Oxford University Press;London: Oxford University Press |
| 摘要: | 摘要： We present infrared (IR) galaxy luminosity functions (LFs) in the AKARI North Ecliptic Pole (NEP) deep field using recently-obtained, wider Canada–France–Hawaii Telescope (CFHT) optical/near-IR images. AKARI has obtained deep images in the mid-infrared (IR), covering 0.6 deg2 of the NEP deep field. However, our previous work was limited to the central area of 0.25 deg2 due to the lack of optical coverage of the full AKARI NEP survey. To rectify the situation, we recently obtained CFHT optical and near-IR images over the entire AKARI NEP deep field. These new CFHT images are used to derive accurate photometric redshifts, allowing us to fully exploit the whole AKARI NEP deep field. AKARI's deep, continuous filter coverage in the mid-IR wavelengths (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24 μm) exists nowhere else, due to filter gaps of other space telescopes. It allows us to estimate rest-frame 8 and 12 μm luminosities without using a large extrapolation based on spectral energy distribution fitting, which was the largest uncertainty in previous studies. Total infrared (TIR) luminosity is also obtained more reliably due to the superior filter coverage. The resulting rest-frame 8 and 12 μm, and TIR LFs at 0.15 < z < 2.2 are consistent with previous works, but with reduced uncertainties, especially at the high-luminosity end, thanks to the wide-field coverage. In terms of cosmic infrared luminosity density (ΩIR), we found that the ΩIR evolves as ∝ (1 + z)4.2 ± 0.4.
出版者： London: Oxford University Press
出版日期： 2015-09-11
出處： Monthly notices of the Royal Astronomical Society, 2015-09, Vol.452 (2), p.1684-1693
資源來源： Alma/SFX Local Collection
版權： 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society 2015
版權： Copyright Oxford University Press, UK Sep 11, 2015
版權： licence_http://creativecommons.org/publicdomain/zero
識別號： ISSN: 0035-8711
識別號： EISSN: 1365-2966
識別號： DOI: 10.1093/mnras/stv1411 |
| 顯示於類別: | [天文研究所] 期刊論文
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