Résumé / Abstract Journal-club_Galaxies

Journal-club Galaxies

« Getting ready for JWST: new generation spectral models and interpretation tools »

Jacopo Chevallard
Institut d'Astrophysique de Paris (Paris, France)

The James Webb Space Telescope (JWST), scheduled for launch in October 2018, will open a largely unexplored observational window at near- to mid-infrared wavelengths (0.6-28 micron). In particular, the Near-InfraRed Spectrograph (NIRSpec) on board JWST will allow the detection of standard UV and optical emission lines out to redshift ~ 10 and beyond for large samples of galaxies. This will provide unique insight into, for example, the star formation activity and early chemical enrichment of galaxies, the co-evolution of galaxies and AGNs, the impact of stellar and AGN feedback, and the main drivers of cosmic reionization. One of the first large programs to exploit the new observational capabilities of JWST will be the NIRSpec Guaranteed-Time-Observations (GTO) program, which includes a multi-layered survey in Multi-Object-Spectroscopy (MOS) mode targeting ~10000 galaxies at 1.5 < z < 10, as well as an Integral-Field-Unit (IFU) survey targeting ~60 galaxies and AGNs out to z~9.

In this talk, after a short review of JWST and the NIRSpec GTO program, I will present a set of physically-motivated simulations of NIRSpec observations, which we have used to optimise the survey design, and which will be made available to the community on time for the preparation of Cycle-1 General-Observer (GO) observations (call for proposals on 30/11/2017). I will also discuss a new set of state-of-the-art population synthesis+photoionization models, developed in collaboration with the NEOGAL team at the IAP, tailored to the interpretation of high-redshift galaxy observations, incorporated into our new-generation analysis tool "Beagle".
jeudi 2 novembre 2017 - 11:30
Salle 281, Institut d'Astrophysique
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