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| Paper: |
AKARI Mid-Infrared Spectroscopic Views of Galaxies out to z ∼ 0.5 |
| Volume: |
399, Panoramic Views of Galaxy Formation and Evolution |
| Page: |
292 |
| Authors: |
Ohyama, Y.; Wada, T.; Matsuhara, H.; Takagi, T.; the SPICY Team |
| Abstract: |
It has been realized since the Infrared Space Observatory (ISO) that there are numerous faint galaxies seen at mid-infrared (MIR), and they are so numerous that strong evolution in luminosity and/or space density at z = 0.3 − 2 has been discussed. It has also been realized that PAH (polycyclic aromatic hydrocarbon) emission contributes significantly to the observed MIR flux. Since the PAH emission is known to trace star-formation activity, investigation on their MIR activity and especially on their strong PAH emission could be essential in understanding galaxy evolution at mid-z universe (z = 0.3 − 2). The InfraRed Camera (IRC) onboard AKARI is very unique and allows sensitive wide-field slit-less spectroscopic surveys over wide wavelength ranges at NIR and MIR (2-26μm). To exploit this unique capability, we have been conducting a blank-sky deep MIR slit-less spectroscopy survey, the SPICY project, to provide an excellent sample of faint MIR galaxies for examining galaxy evolution at z ∼< 0.5. The main benefits of this survey are direct determination of redshift and target activity (by analyzing spectral features), and the fair sampling of objects (with little selection biases). |
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