Thierry Contini

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We observed the Hubble Deep Field South with the new panoramic integral field spectrograph MUSE that we built and just commissioned at the VLT. The data cube resulting from 27 hours of integration covers one arcmin2 field of view at an unprecedented depth with a 1 emission line surface brightness limit of 1 ⇥ 10–19erg s–1cm–2 arcsec–2, and contains ⇠90,000(More)
Type Ia supernovae (SN Ia) have provided the first evidence for an accelerating universe and for the existence of an unknown “dark energy” driving this expansion. The 5-year Supernova Legacy Survey (SNLS) will deliver ∼700 type Ia supernovae and as many type II supernovae with wellsampled light curves in 4 filters g′, r′, i′ and z′. The current status of(More)
Aims. We present the low frequency (610 MHz) radio source counts of the VVDS-VLA field and investigate the radio spectral index properties of the sub-mJy population. Methods. We use new deep (r.m.s.≃ 50 μJy/beam) observations of the VVDS-VLA field obtained at 610 MHz with the GMRT and matched in resolution (6 arcsec) with already available VLA data at 1.4(More)
We performed a compilation of more than 1000 published spectra of H ii regions in spiral galaxies. The oxygen and nitrogen abundances in each H ii region were recomputed in a homogeneous way, using the P–method. The radial distributions of oxygen and nitrogen abundances were derived. The correlations between oxygen abundance and macroscopic properties are(More)
Context. Identifying the main processes of galaxy assembly at high redshifts is still a major issue to understand galaxy formation and evolution at early epochs in the history of the Universe. Aims. This work aims to provide a first insight into the dynamics and mass assembly of galaxies at redshifts 1.2 < z < 1.6, the early epoch just before the sharp(More)
Observations of distant supernovae indicate that the Universe is now in a phase of accelerated expansion the physical cause of which is a mystery. Formally, this requires the inclusion of a term acting as a negative pressure in the equations of cosmic expansion, accounting for about 75 per cent of the total energy density in the Universe. The simplest(More)
We study the relation between nitrogen and oxygen abundances as a function of metallicity for a sample of emission-line objects for which a direct measurement of the metallicity has been possible. This sample is representative of the very different conditions in ionization and chemical enrichement that we can find in the Universe. We first construct the N/O(More)
To understand the evolution of galaxies, we need to know as accurately as possible how many galaxies were present in the Universe at different epochs. Galaxies in the young Universe have hitherto mainly been identified using their expected optical colours, but this leaves open the possibility that a significant population remains undetected because their(More)
We present photometric redshifts for the COSMOS survey derived from a new code, optimized to yield accurate and reliable redshifts and spectral types of galaxies down to faint magnitudes and redshifts out to z 1:2. The technique uses 2 template fitting, combined with luminosity function priors and with the option to estimate the internal extinction [or E(B(More)