6 papers
Extracting cosmological information from galaxy spectra and observations of high-redshift objects
Raul Jimenez
I review the statistical techniques needed to extract information about physical parameters of galaxies from their observed spectra. This is important given the sheer size of the n…
Setting the stellar evolution clock for intermediate age populations
R. Jimenez
In this invited talk I show how the reddest and rarest galaxies at high redshift () can be used to set the stellar evolution clock. I argue that one can confidently c…
Towards an accurate determination of the age of the Universe
R. Jimenez
In the past 40 years a considerable effort has been focused in determining the age of the Universe at zero redshift using several stellar clocks. In this review I will describe the…
The Age of the Universe
Raul Jimenez
In this article I review the main methods for determining the age of the Universe. I describe how to determine the age of the oldest known systems at z=0, the system of galactic gl…
High-z objects and cold-dark-matter cosmogonies: the case of 53W091
A. Kashlinsky, R. Jimenez
The recently discovered high redshift galaxy, 53W091, with accurate age measurements (Dunlop et al 1996) provides a measure of the small-scale power of the primordial density field…
Are Low Surface Brightness Discs Young?
Paolo Padoan, Raul Jimenez, Vincenzo Antonuccio-Delogu
We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LSB) galaxies by making use of a new IMF recently derived from numerical fluid dynami…