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Proceedings Paper

Simulations of high-z galaxy observations with an ELT-MOS
Author(s): Karen Disseau; Mathieu Puech; Hector Flores; François Hammer; Yanbin Yang; Laura Pentericci
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Paper Abstract

We present simulated observations of one of the major science cases for the 39m E-ELT, namely the detection of very high-z galaxies. We simulated the detection of UV interstellar lines at z = 7 and the detection of the Lyman alpha line and the Lyman break at z = 9, both with MOAO-assisted IFUs and GLAO-fed fibers. These simulations are performed with the scientific simulator we developped in the frame of the E-ELT phase A studies. First, we give a functional description of this simulator, which is coupled to a public web interface WEBSIM, and we then give an example of its practical use to constrain the high level specifications of MOSAIC, a new multi-object spectrograph concept for the E-ELT. Our simulations show that the most constraining case is the detection of UV interstellar lines. The optimal pixel size is found to be ~80 mas, which allows detecting UV lines up to JAB ~27 in 40 hours of integration time. Lyman Alpha Emitters and Lyman Break Galaxies are detected respectively up to JAB ~30 and JAB ~28 with a 80 mas/pixel IFU and within only 10 hours of integration time. Detection limits are typically ~0.5-1 mag fainter using MOAO-fed IFUs than using GLAO-fed fibers, but the multiplex is one magnitude larger in the mode using GLAO-fed fibers. We explore the optimal observational strategy for each observing mode considering these observing limits as well as the expected target densities.

Paper Details

Date Published: 28 July 2014
PDF: 14 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914791 (28 July 2014); doi: 10.1117/12.2055161
Show Author Affiliations
Karen Disseau, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Mathieu Puech, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Hector Flores, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
François Hammer, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Yanbin Yang, GEPI, Observatoire de Paris, CNRS, Univ. Paris Diderot (France)
Laura Pentericci, INAF - Osservatorio Astronomico di Roma (Italy)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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