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Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field: Revealing the cosmic star formation history hidden by dust

Goto, T. and Takagi, T. and Matsuhara, H. and Takeuchi, T. T. and Pearson, C. and Wada, T. and Nakagawa, T. and Ilbert, O. and Le Floc'h, E. and Oyabu, S. and Ohyama, Y. and Malkan, M. and Lee, H. M. and Lee, M. G. and Inami, H. and Hwang, N. and Hanami, H. and Im, M. and Imai, K. and Ishigaki, T. and Serjeant, S. and Shim, H. (2010) Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field: Revealing the cosmic star formation history hidden by dust. Astronomy and Astrophysics, 514 . Art. No. A6. ISSN 0004-6361.

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Aims. Dust-obscured star-formation increases with increasing intensity and increasing redshift. We aim to reveal the cosmic starformation history obscured by dust using deep infrared observation with AKARI. Methods. We constructed restframe 8 μm, 12 μm, and total infrared (TIR) luminosity functions (LFs) at 0.15 < z < 2.2 using 4128 infrared sources in the AKARI NEP-deep field. A continuous filter coverage in the mid-IR wavelength (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24 μm) by the AKARI satellite allowed us to estimate restframe 8 μm and 12 μm luminosities without using a large extrapolation based on an SED fit, which was the largest uncertainty in previous work. Results. We find that all 8 μm (0.38 < z < 2.2), 12 μm (0.15 < z < 1.16), and TIR LFs (0.2 < z < 1.6) show continuous and strong evolution toward higher redshift. Our direct estimate of 8 μm LFs is useful since previous work often had to use a large extrapolation from the Spitzer 24 μm to 8 μm, where SED modeling is more difficult because of the PAH emissions. In terms of cosmic infrared luminosity density (Ω_(IR)), which was obtained by integrating analytic fits to the LFs, we find good agreement with previous work at z < 1.2. We find the ΩIR evolves as ∝(1 + z)^(4.4±1.0). When we separate contributions to Ω_(IR) by LIRGs and ULIRGs, we found more IR luminous sources are increasingly more important at higher redshift. We find that the ULIRG (LIRG) contribution increases by a factor of 10 (1.8) from z = 0.35 to z = 1.4.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Pearson, C.0000-0001-6139-649X
Ilbert, O.0000-0002-7303-4397
Ohyama, Y.0000-0001-9490-3582
Malkan, M.0000-0001-6919-1237
Lee, H. M.0000-0003-4412-7161
Inami, H.0000-0003-4268-0393
Im, M.0000-0002-8537-6714
Serjeant, S.0000-0002-0517-7943
Additional Information:© ESO 2010. Received 26 August 2009. Accepted 23 December 2009. We are grateful to S. Arnouts for providing the LePhare code and kindly helping us in using the code. We thank the anonymous referee for many insightful comments, that significantly improved the paper. T.G. and H.I. acknowledge financial support from the Japan Society for the Promotion of Science (JSPS) through JSPS Research Fellowships for Young Scientists. H.M.L. acknowledges the support from KASI through its cooperative fund in 2008. T.T.T. has been supported by Program for Improvement of Research Environment for Young Researchers from Special Coordination Funds for Promoting Science and Technology and the Grant-in-Aid for the Scientific Research Fund (20740105) commissioned by the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan. T.T.T. has also been partially supported from the Grand-in-Aid for the Global COE Program “Quest for Fundamental Principles in the Universe: from Particles to the Solar System and the Cosmos” from the MEXT. This research is based on the observations with AKARI, a JAXA project with the participation of ESA. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this sacred mountain.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)UNSPECIFIED
Korea Astronomy and Space Science Institute (KASI)UNSPECIFIED
Ministry of Education, Culture Sports, Science, and Technology (MEXT) of Japan20740105
Subject Keywords:infrared: galaxies, galaxies: luminosity function, mass function, galaxies: evolution, galaxies: high-redshift galaxies: formation galaxies: starburst
Record Number:CaltechAUTHORS:20100603-140816845
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Official Citation:Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field - Revealing the cosmic star formation history hidden by dust T. Goto, T. Takagi, H. Matsuhara, T. T. Takeuchi, C. Pearson, T. Wada, T. Nakagawa, O. Ilbert, E. Le Floc'h, S. Oyabu, Y. Ohyama, M. Malkan, H. M. Lee, M. G. Lee, H. Inami, N. Hwang, H. Hanami, M. Im, K. Imai, T. Ishigaki, S. Serjeant and H. Shim A&A 514 A6 (2010) DOI: 10.1051/0004-6361/200913182
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18554
Deposited By: Ruth Sustaita
Deposited On:03 Jun 2010 23:07
Last Modified:09 Mar 2020 13:19

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