Bibcode
Kaneda, H.; Ishihara, D.; Oyabu, S.; Yamagishi, M.; Wada, T.; Armus, L.; Baes, M.; Charmandaris, V.; Czerny, B.; Efstathiou, A.; Fernández-Ontiveros, J. A.; Ferrara, A.; González-Alfonso, E.; Griffin, M.; Gruppioni, C.; Hatziminaoglou, E.; Imanishi, M.; Kohno, K.; Kwon, J.; Nakagawa, T.; Onaka, T.; Pozzi, F.; Scott, D.; Smith, J.-D. T.; Spinoglio, L.; Suzuki, T.; van der Tak, F.; Vaccari, M.; Vignali, C.; Wang, L.
Bibliographical reference
Publications of the Astronomical Society of Australia, Volume 34, id.e059 16 pp.
Advertised on:
11
2017
Citations
16
Refereed citations
11
Description
The mid-infrared range contains many spectral features associated with
large molecules and dust grains such as polycyclic aromatic hydrocarbons
and silicates. These are usually very strong compared to fine-structure
gas lines, and thus valuable in studying the spectral properties of
faint distant galaxies. In this paper, we evaluate the capability of
low-resolution mid-infrared spectroscopic surveys of galaxies that could
be performed by SPICA. The surveys are designed to address the question
how star formation and black hole accretion activities evolved over
cosmic time through spectral diagnostics of the physical conditions of
the interstellar/circumnuclear media in galaxies. On the basis of
results obtained with Herschel far-infrared photometric surveys of
distant galaxies and Spitzer and AKARI near- to mid-infrared
spectroscopic observations of nearby galaxies, we estimate the numbers
of the galaxies at redshift z > 0.5, which are expected to be
detected in the polycyclic aromatic hydrocarbon features or dust
continuum by a wide (10 deg2) or deep (1 deg2)
blind survey, both for a given observation time of 600 h. As by-products
of the wide blind survey, we also expect to detect debris disks, through
the mid-infrared excess above the photospheric emission of nearby
main-sequence stars, and we estimate their number. We demonstrate that
the SPICA mid-infrared surveys will efficiently provide us with
unprecedentedly large spectral samples, which can be studied further in
the far-infrared with SPICA.
Related projects
The Central PARSEC of Galaxies using High Spatial Resolution Techniques
PARSEC is a multi-wavelength investigation of the central PARSEC of the nearest galaxies. We work on black-hole accretion and its most energetic manifestations: jets and hot spots, and on its circumnuclear environment conditions for star formation. We resort to the highest available angular resolution observations from gamma-rays to the centimetre
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