Probing the Large Scale Structure with QSOs and radio-galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16 pages Latex, with 4 PostScript figures. Invited Review at the MPA/ESO Cosmology Conference "Evolution of Large-Scale Struct

Scientific paper

QSOs and radio-galaxies, together with the CMB, ``normal'' galaxies and clusters, represent the main source of information about the origin and evolution of the Large Scale Structure. They can be used either directly, as tracers of the density peaks, or as cosmic lighthouses, probing the Universe along the line of sight with their conspicuous flow of photons. The amplitude of the QSO clustering has been measured to be $r_o \simeq 6 \hmpc$ at $z\sim 2$ and appears to increase with redshift. These properties are consistent with a scenario in which the quasars, with a lifetime of $t \sim 10^8 yr$, sparsely sample halos of mass greater than $M_{min} \sim 10^{12}-10^{13} h^{-1}$ M$_{\odot}$. Radio-galaxies are found to cluster on similar scales. The study of QSO and radio-galaxy environments is in qualitative agreement with their clustering properties. Absorption-line systems observed in high-resolution spectra of QSOs show structure, including voids/underdensities and overdensities, from the smallest scales to tens of Mpc. QSO pairs, groups and lenses allow us to get a 3-D glimpse of the absorbers, providing invaluable information about their size, ionization, mass. Great progress in this field is expected from the new instrumentation coming into operation at the 8-m class telescopes.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Probing the Large Scale Structure with QSOs and radio-galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Probing the Large Scale Structure with QSOs and radio-galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing the Large Scale Structure with QSOs and radio-galaxies will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-71667

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.