Issue |
SPICA Workshop
2009
|
|
---|---|---|
Article Number | 04017 | |
Number of page(s) | 4 | |
Section | Galaxy Formation and Evolution | |
DOI | https://doi.org/10.1051/spica/200904017 | |
Published online | 24 December 2009 |
A Milestone to SPICA Extragalactic Surveys: The AKARI NEP Survey
1
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Japan
2
Institute for Astronomy, University of Hawaii, USA
3
Academia Sinica, Institute of Astronomy and Astrophysics, Taiwan
4
Physics section, Faculty of Humanities and Social Sciences, Iwate University, Japan
5
Rutherford Appleton Laboratory, UK
6
Department of Physics, The Open University, UK
7
Department of Physics & Astronomy, FPRD, Seoul National University, Korea
8
Department of Physics and Astronomy, UCLA, USA
Large area surveys in the infrared wavelengths have revealed a significant evolution of the star formation activity of the universe in the past. The extragalactic sur- vey we have conduced with AKARI towards the north ecliptic pole (NEP) is unique, in terms of a comprehensive wavelength coverage from 2 to 24 micron using all 9 photometric bands of the Infrared Camera (IRC). We demonstrate that this IRC all-band photometry is capable of tracing a steep rise in the flux at the blue side of the polycyclic aromatic hydrocarbon (PAH) 6.2 micron emission feature of infrared luminous galaxies at z < 1. This allows us to estimate redshifts of mid-IR sources and identify `ultra-luminous starburst galaxies', based on mid-IR spectral energy distributions (SEDs). SPICA could inherit this unique capability of AKARI and extend the study to typical galaxy populations at z ~ 2, i.e. a critical period of galaxy formation.
Key words: Galaxies: formation / Galaxies: infrared / Missions: SPICA / Missions: AKARI
© Owned by the authors, published by EDP Sciences, 2009