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Origins Space Telescope: Predictions for far-IR spectroscopic surveys

Bonato, Matteo and De Zotti, Gianfranco and Leisawitz, David and Negrello, Mattia and Massardi, Marcella and Baronchelli, Ivano and Cai, Zhen-Yi and Bradford, Charles M. and Pope, Alexandra and Murphy, Eric J. and Armus, Lee and Cooray, Asantha (2019) Origins Space Telescope: Predictions for far-IR spectroscopic surveys. Publications of the Astronomical Society of Australia, 36 . Art. No. e017. ISSN 1323-3580.

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We illustrate the extraordinary potential of the (far-IR) Origins Survey Spectrometer (OSS) on board the Origins Space Telescope (OST) to address a variety of open issues on the co-evolution of galaxies and AGNs. We present predictions for blind surveys, each of 1000 h, with different mapped areas (a shallow survey covering an area of 10 deg^2 and a deep survey of 1 deg^2) and two different concepts of the OST/OSS: with a 5.9 m telescope (Concept 2, our reference configuration) and with a 9.1 m telescope (Concept 1, previous configuration). In 1 000 h, surveys with the reference concept will detect from ∼1.9×10^6 to ∼8.7×10^6 lines from ∼4.8×10^5 to 2.7×10^6 star-forming galaxies and from ∼1.4×10^4 to ∼3.8×10^4 lines from ∼1.3×10^4 to 3.5×10^4 AGNs. The shallow survey will detect substantially more sources than the deep one; the advantage of the latter in pushing detections to lower luminosities/higher redshifts turns out to be quite limited. The OST/OSS will reach, in the same observing time, line fluxes more than one order of magnitude fainter than the SPICA/SMI and will cover a much broader redshift range. In particular it will detect tens of thousands of galaxies at z ≥ 5, beyond the reach of that instrument. The polycyclic aromatic hydrocarbons lines are potentially bright enough to allow the detection of hundreds of thousands of star-forming galaxies up to z ∼ 8.5, i.e. all the way through the reionisation epoch. The proposed surveys will allow us to explore the galaxy–AGN co-evolution up to z ∼ 5.5−6 with very good statistics. OST Concept 1 does not offer significant advantages for the scientific goals presented here.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bonato, Matteo0000-0001-9139-2342
De Zotti, Gianfranco0000-0003-2868-2595
Baronchelli, Ivano0000-0003-0556-2929
Pope, Alexandra0000-0001-8592-2706
Murphy, Eric J.0000-0001-7089-7325
Armus, Lee0000-0003-3498-2973
Cooray, Asantha0000-0002-3892-0190
Additional Information:© 2019 Astronomical Society of Australia. Published online: 24 April 2019. We thank Roberto Maiolino and Alessandro Bressan for enlightening suggestions, and the anonymous referee for useful comments that led to substantial improvements in this paper. The study acknowledges partial financial support by the Italian Ministero dell’Istruzione, Università e Ricerca through the grant ‘Progetti Premiali 2012 - iALMA’ (CUP C52I13000140001). The work is also supported in part by PRIN–INAF 2014 “Probing the AGN/galaxy co-evolution through ultra-deep and ultra-high resolution radio surveys”, by PRIN–INAF 2012 “Looking into the dust-obscured phase of galaxy formation through cosmic zoom lenses in the Herschel Astrophysical Large Area Survey” and by ASI/INAF agreement n. 2014-024-R.1. M.B. and G.D.Z. acknowledge support from INAF under PRIN SKA/CTA FORECaST. Z.Y.C. is supported by the National Science Foundation of China (grant No. 11503024). M.N. acknowledges financial support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 707601.
Funding AgencyGrant Number
Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR)C52I13000140001
Agenzia Spaziale Italiana (ASI)2014-024-R.1
Istituto Nazionale di Astrofisica (INAF)PRIN SKA/CTA FORECaST
National Natural Science Foundation of China11503024
Marie Curie Fellowship707601
Subject Keywords:galaxies: luminosity function – galaxies: evolution – galaxies: active – galaxies: starburst – infrared: galaxies
Record Number:CaltechAUTHORS:20190509-160652787
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Official Citation:Bonato, M., De Zotti, G., Leisawitz, D., Negrello, M., Massardi, M., Baronchelli, I., . . . Cooray, A. (2019). Origins Space Telescope: Predictions for far-IR spectroscopic surveys. Publications of the Astronomical Society of Australia, 36, E017. doi:10.1017/pasa.2019.8
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95388
Deposited By: Tony Diaz
Deposited On:09 May 2019 23:37
Last Modified:03 Oct 2019 21:13

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