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Unbiased Large Spectroscopic Surveys of Galaxies Selected by SPICA Using Dust Bands

Kaneda, H. and Armus, L. (2017) Unbiased Large Spectroscopic Surveys of Galaxies Selected by SPICA Using Dust Bands. Publications of the Astronomical Society of Australia, 34 . Art. No. e059. ISSN 1323-3580. doi:10.1017/pasa.2017.56.

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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 deg^2) or deep (1 deg^2) 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.

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Armus, L.0000-0003-3498-2973
Additional Information:© 2017 Astronomical Society of Australia. Published online: 20 November 2017. This paper is dedicated to the memory of Bruce Swinyard, who unfortunately passed away on 22 May 2015 at the age of 52. He initiated the SPICA project in Europe as first European PI of SPICA and first design lead of SAFARI. We thank all the members of SPICA Science Working Group and the SMI consortium for their continuous discussions on science case and requirements for SMI. We are especially grateful to the board members of SPICA Science Case International Preview (Michael Rowan-Robinson, Martin Bureau, David Elbaz, Peter Barthel, Anthony Peter Jones, Martin Harwit, George Helou, Kazuhisa Mitsuda) and JAXA’s SPICA International Science Advisory Board (Philippe Andre, Andrew Blain, Michael Barlow, David Elbaz, Yuri Aikawa, Ewine van Dishoeck, Reinhard Genzel, George Helou, Roberto Maiolino, Margaret Meixner, Tsutomu Takeuchi) for giving us invaluable comments and advice. The optical/mechanical designing activities of SMI to fulfill the science requirements are funded by JAXA within the framework of the SPICA preproject in Phase A1.
Group:Infrared Processing and Analysis Center (IPAC)
Subject Keywords:galaxies: active – galaxies: evolution – galaxies: star formation – infrared: galaxies – infrared: ISM – methods: observational
Record Number:CaltechAUTHORS:20180125-080809473
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Official Citation:Kaneda, H., Ishihara, D., Oyabu, S., Yamagishi, M., Wada, T., Armus, L., . . . Wang, L. (2017). Unbiased Large Spectroscopic Surveys of Galaxies Selected by SPICA Using Dust Bands. Publications of the Astronomical Society of Australia, 34. doi:10.1017/pasa.2017.56
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84511
Deposited By: Tony Diaz
Deposited On:25 Jan 2018 17:08
Last Modified:15 Nov 2021 20:20

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