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|Title:||Origins Space Telescope: Predictions for far-IR spectroscopic surveys||Authors:||BONATO, MATTEO
DE ZOTTI, Gianfranco
Bradford, Charles M.
Murphy, Eric J.
|Issue Date:||2019||Journal:||PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA||Number:||36||First Page:||e017||Abstract:||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<SUP>2</SUP> and a deep survey of 1 deg<SUP>2</SUP>) 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<SUP>6</SUP> to ∼8.7×10<SUP>6</SUP> lines from ∼4.8×10<SUP>5</SUP> to 2.7×10<SUP>6</SUP> star-forming galaxies and from ∼1.4×10<SUP>4</SUP> to ∼3.8×10<SUP>4</SUP> lines from ∼1.3×10<SUP>4</SUP> to 3.5×10<SUP>4</SUP> 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.||URI:||http://hdl.handle.net/20.500.12386/30252||URL:||https://www.cambridge.org/core/journals/publications-of-the-astronomical-society-of-australia/article/origins-space-telescope-predictions-for-farir-spectroscopic-surveys/6DD0F4A767535D79D72B432BE49F8DBD||ISSN:||1448-6083||DOI:||10.1017/pasa.2019.8||Bibcode ADS:||2019PASA...36...17B||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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checked on Jun 15, 2021
checked on Jun 15, 2021
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