Principal Investigator: Nicolas Tejos
PI Institution: Pontificia Universidad Catolica de Valparaiso
Investigators
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Title: The intergalactic medium in the cosmic web
Cycle: 22
Abstract
We request funding to perform a dedicated survey and analysis of the
HST archive of COS-G130M quasar spectra to construct an
absorption-line catalog tuned to study the environment {i.e. large-scale
structure, LSS} of the intergalactic medium {IGM}. Specifically, we
will characterize the HI Lyman series absorption at z<0.1 and
associate metals for all absorbers along 100 quasar sightlines
penetrating the SDSS footprint. Using standard line-profile fitting
techniques, we will recover HI column densities and Doppler
parameters. These will be publicly released in a database that
includes spectral masks identifying spurious spectral features,
regions biased by previously known systems, etc. This catalog will be
analyzed in conjunction with the suite of LSS catalogs generated from
the SDSS footprint {e.g. clusters, groups}, with emphasis on new
algorithms designed to identify and characterize galaxy voids.
Through this analysis, we will test the predictions from our
cosmological paradigm that the IGM traces a so-called cosmic web of
LSS.