Query : 2016A&A...593A..24G

2016A&A...593A..24G - Astronomy and Astrophysics, volume 593A, 24-24 (2016/9-1)

Exploring high-z galaxies with the E-ELT.


Abstract (from CDS):

We present simulated observations of galaxies at z=2 and z=3 to probe the capabilities of next-generation telescopes (E-ELT and JWST) to measure the structural and photometrical properties of high-redshift galaxies. We carry out an extensive set of simulations of high-redshift galaxies adopting the specifications of the E-ELT first light instrument MICADO. The main parameters (sizes, Sersic index, and magnitudes) of the galaxies are measured using GALFIT and the accuracy of the determinations is assessed by comparing the input values to the measurements from many runs with different statistical noise. We also address the effects on the accuracy of the measurements of possible spatial variation of the point spread function (PSF) in the field. We find that from 3h exposure E-ELT near-infrared (IR) images of galaxies at z∼2 and z∼3 it will be possible to measure the size, total magnitude, and galaxy morphology with an accuracy of 2-5% for objects as faint as H∼25 and half-light size of 0.2-arcsec. The effective radius of compact, early-type galaxies is also recovered with ∼5% accuracy, provided that their half-light size exceeds 20mas. These results are compared with those expected from simulated observations obtained with NIRCam on board the JWST.

Abstract Copyright: © ESO 2016

Journal keyword(s): instrumentation: adaptive optics - techniques: photometric - galaxies: fundamental parameters - galaxies: high-redshift - galaxies: photometry

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 APG 142 PaG 09 37 44.6 +02 45 15           ~ 24 0
2 UGC 9618 IG 14 57 00.4 +24 36 44   14.3       ~ 120 1
3 NGC 6217 AGN 16 32 39.2100852960 +78 11 53.487076092   14.37 13.88     ~ 294 0

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