Probing star formation in the early universe with Far-IR spectroscopy using ZEUS-2

Vishwas, Amit, Ferkinhoff, Carl, Nikola, Thomas, Parshley, Stephen, Schoenwald, Justin Paul, Stacey, Gordon J, Higdon, James L., Higdon, Sarah, Brisbin, Drew, Verma, Aprajita, Riechers, Dominik A., Hailey-Dunsheath, Steve, Menten, Karl, Gusten, Rolf, Weiss, Axel, Irwin, Kent, Cho, Hsiao-Mei, Neimack, Michael D., Halpern, Mark, Amiri, Mandana, Hasselfield, Matthew, Weibe, Donald V., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 and Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918 2015. Probing star formation in the early universe with Far-IR spectroscopy using ZEUS-2. Presented at: 225th Meeting of the American Astronomical Society, Seattle, WA, United States, 04-08 January 2015.

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Abstract

ZEUS-2 is a long slit, direct detection, grating spectrometer for submillimeter wavelengths between 200-850 μm. At present, ZEUS-2 employs a single TES bolometer array that addresses only the 350 and 450 μm windows. Here we report the first science obtained with this array on the Atacama Pathfinder Experiment (APEX) telescope, and our progress towards implementing a second TES array that will open up the 200, 230, 640, 850 μm windows for direct detection spectroscopy on APEX.Our investigations focus on detecting faint and broad far-infrared (FIR) fine structure lines of ionized carbon [CII] at 158 μm, nitrogen [NII] at 122 and 205 μm and doubly ionized oxygen [OIII] at 52 and 88 μm from distant galaxies as the lines are redshifted into the submm telluric windows. We are primarily interested in the redshift 1 to 4 interval which encompasses the epoch of maximum star formation rate per unit co-moving volume in the Universe. These far infrared lines are important gas coolants, and powerful probes of the physical conditions of the interstellar medium and the starlight that heats the gas. Here we report detections of the [CII] and [OIII] 88 μm lines from sources at redshift 1.8 to 4.3, and show how the lines can be used to trace both the spatial extent of the star formation and the hardness of the ambient radiation fields.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Unpublished
Schools:	Physics and Astronomy
Last Modified:	10 May 2023 10:45
URI:	https://orca.cardiff.ac.uk/id/eprint/156666

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