Results 41 to 50 of about 50 (50)
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Astrophysics in the Next Decade: The Evolution of Galaxies
2009One of the primary goals of observational cosmology is to understand how galaxies form and evolve into the current population of objects we observe around us today. The redshift range, 1.5 ⩽ z ⩽ 3.5 represents a crucial epoch for observing the assembly of the modern galaxy population, which is largely in place by z ∼ 1.
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Cosmology and Astrophysics with Clusters of Galaxies (Invited)
2004I 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
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Systematics and astrophysics: towards an evolutionary classification of galaxies?
2002It 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. +2 more
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Detailed astrophysical properties of Lyman Break Galaxies
2003A 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.
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Aspects of Cosmic-Ray Astrophysics in the Galaxy and Beyond
1996We review some salient aspects of cosmic-ray astrophysics. Recent advances are discussed, and several outstanding problems are sketched.
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The Stellar Population in Galaxies Observed on the Astrophysical Station “Astron”
199225 star systems were observed in 1983–1987 with the 80cm telescope on the board of astrophysical station “Astron”. Entrance diaphragms were 60″ and 10″. Spectrometer with the exit slit 28 A has measured fluxes in erg/sec cm2 A in the region 1600–3500 AA in regime of narrow band photometry. Exposures in every point were 2–5 min for bright objects and 10–
I. Pronik +3 more
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Galaxies and Relativistic Astrophysics
1974B. Barbanis, J. D. Hadjidemetriou
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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: Galaxy distances and deviations from universal expansion
Nature, 1986Sidney van den Bergh, J. Richard Bond
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