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Where can we really find the First Stars' Remnants today?
M. Trenti, M. R. Santos, M. Stiavelli
A number of recent numerical investigations concluded that the remnants of rare structures formed at very high redshift, such as the very first stars and bright redshift z~6 QSOs,…
The Environments of High Redshift QSOs
Soyoung Kim, Massimo Stiavelli, M. Trenti +9
We present a sample of -dropout candidates identified in five Hubble Advanced Camera for Surveys fields centered on Sloan Digital Sky Survey QSOs at redshift . Ou…
The UDF05 Follow-up of the HUDF: II. Constraints on Reionization from z-dropout Galaxies
P. A. Oesch, C. M. Carollo, M. Stiavelli +12
[Abridged] We detect three (plus one less certain) z-dropout sources in two separate fields of our UDF05 HST NICMOS images. These z~7 Lyman-Break Galaxy (LBG) candidates allow us t…
Cosmic Variance and Its Effect on the Luminosity Function Determination in Deep High z Surveys
M. Trenti, M. Stiavelli
We study cosmic variance in deep high redshift surveys and its influence on the determination of the luminosity function for high redshift galaxies. For several survey geometries r…
The very first Pop III stars and their relation to bright z~6 quasars
M. Trenti, M. Stiavelli
We discuss the link between dark matter halos hosting the first PopIII stars formed at redshift z > 40 and the rare, massive, halos that are generally considered to host bright z~6…
The UDF05 Follow-up of the HUDF: I. The Faint-End Slope of the Lyman-Break Galaxy Population at z~5
P. A. Oesch, M. Stiavelli, C. M. Carollo +14
We present the UDF05 project, a HST Large Program of deep ACS (F606W, F775W, F850LP) and NICMOS (F110W, F160W) imaging of three fields, two of which coincide with the NICP1-4 NICMO…
Distribution of the very first PopIII stars and their relation to bright z~6 quasars
M. Trenti, M. Stiavelli
We discuss the link between dark matter halos hosting the first PopIII stars and the rare, massive, halos that are generally considered to host bright quasars at high redshift z~6.…
Dust absorption along the line of sight for high-redshift objects
M. Trenti, M. Stiavelli
We estimate the optical depth distribution of dust present in absorption systems along the line of sight of high redshift galaxies and the resulting reddening. We characterize the…
Neutral gas density in Damped Lyman Alpha systems
M. Trenti, M. Stiavelli
We estimate the intrinsic neutral gas density in Damped Lyman Alpha systems () in the redshift range from the DLA SDSS DR_3 sample of o…