Observing the first galaxies - a case for an intermediate resolution multi-object IR spectrograph

Details Observing the first galaxies - a case for an intermediate resolution multi-object IR spectrograph Observing the first galaxies - a case for an intermediate resolution multi-object IR spectrograph

2001-07-16

arxiv.org/abs/astro-ph/0107274v1

Astronomy and Astrophysics

Astrophysics

To appear in "Scientific Drivers for ESO Future VLT/VLTI Instrumentation", J. Bergeron and G. Monnet, Eds., Springer Verlag. R

Scientific paper

10.1007/10857019_7

We present a special science case for an intermediate resolution multi-object IR spectrograph for the VLT. We have constructed new models for massive Population III stars and metal-free stellar populations (see Schaerer 2001). The properties of individual stars and integrated populations, including their ionising fluxes and SEDs are discussed. We also study their dependence on the poorly known IMF and the star formation history. The synthetic spectra are used to simulate spectroscopic observations of the expected emission lines of Pop III galaxies. We show that such an instrument should allow the detection and efficient observations of the first galaxies with the VLT.

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