Results 201 to 210 of about 125,059 (235)

Cosmology and Astrophysics with Clusters of Galaxies (Invited)

2004
I discuss the role that X-ray galaxy clusters plays in the determination of cosmological parameter. In particular I focus the discussion on the evolution of the cluster mass function for the determination of the density parameter Ωm and the normalization of the power spectrum σ8. Available constraints indicate that Ωm lies in the range 0.2–0.5, with σ8
openaire   +1 more source

Detailed astrophysical properties of Lyman Break Galaxies

2003
A large statistical sample of z~3 galaxies has been efficiently UV-color-selected, and confirmed spectroscopically. Here we present additional observations providing insight into the physical conditions in these Lyman Break Galaxies (LBGs), selected to be rapidly forming stars when the universe was ~15% of its current age.
openaire   +1 more source

Systematics and astrophysics: towards an evolutionary classification of galaxies?

2002
It is possible to borrow from a topic of biology called phylogenetic systematics, concepts and tools for a logical and objective classification of galaxies. It is based on observable properties of objects - characters - either qualitative (like morphology) or quantitative (like luminosity, mass or spectrum).
Fraix-Burnet, D., Choler, P., Douzery, Emmanuel   +2 more
openaire   +2 more sources

Astrophysics of galaxy clusters and groups with eROSITA

This thesis investigates non-gravitational astrophysical phenomena shaping the physical properties of galaxy clusters and groups. The impact of these processes is constrained by measuring the physical properties of galaxy clusters and groups using X-ray observations of eROSITA.
openaire   +1 more source

Astrophysics: Distant galaxies lack dark matter

Nature, 2017
M. Swinbank
semanticscholar   +1 more source

Aspects of Cosmic-Ray Astrophysics in the Galaxy and Beyond

1996
We review some salient aspects of cosmic-ray astrophysics. Recent advances are discussed, and several outstanding problems are sketched.
openaire   +1 more source

A population of red candidate massive galaxies ~600 Myr after the Big Bang

Nature, 2023
Ivo Labbe, Pieter van Dokkum, Erica Nelson   +2 more
exaly  

Astrophysics: Galaxies in collision

Nature, 1984
openaire   +1 more source

THE TWO POINT CORRELATION FUNCTION FOR GROUPS OF GALAXIES IN THE CENTER FOR ASTROPHYSICS REDSHIFT SURVEY

, 1990
M. Ramella, M. Geller, J. Huchra
semanticscholar   +1 more source

Simulations of the formation, evolution and clustering of galaxies and quasars

Nature, 2005
Volker Springel, Simon D M White, Adrian Jenkins   +2 more
exaly