Results 21 to 30 of about 1,140 (187)
A comparison of metal and Ly-α absorption in galactic haloes [PDF]
Serbian Astronomical Journal, 1998 The metallicity structure of galactic haloes is one of the major unknowns in modern galactic astrophysics and observational cosmology. Hereby we outline a very simple method for obtaining at least a crude picture of gas abundances, based on ...
Ćirković M.M.
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Counter-rotating black holes from FRII lifetimes
Frontiers in Astronomy and Space Sciences, 2023 Estimates suggest that while FRII jets appear to have lifetimes constrained to hundreds of millions of years, radio galaxies with FRI jets appear to be longer lived.
David Garofalo
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Multi-Frequency Study of the SZ Effect in Cosmic Structures
Acta Polytechnica CTU Proceedings, 2014 The Sunyaev-Zel’dovich effect (SZE) is a relevant probe for cosmology and astrophysics. A multi-frequency approach to study the SZE in cosmic structures turns out to be crucial in the use of this probe for astrophysics and cosmology.
Sergio Colafrancesco
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THE SZ EFFECT IN THE PLANCK ERA: ASTROPHYSICAL AND COSMOLOGICAL IMPACT
Acta Polytechnica, 2013 The Sunyaev–Zel’dovich effect (SZE) is a relevant probe for cosmology and particle astrophysics. The Planck Era marks a definite step forward in the use of this probe for astrophysics and cosmology. Astrophysical applications to galaxy clusters, galaxies,
Sergio Colafrancesco
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The Astrophysical Journal, 2023 The metallicity enrichment history (MEH) of a galaxy is determined by its star formation history (SFH) and the gas cycling process. In this paper, we construct a chemical evolution model that is regulated by the SFH of the system.
Jun Yin, Shiyin Shen, Lei Hao
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The astrophysics of early galaxy formation [PDF]
, 2008 39 pages, to appear in the proceedings of the XVIII Canary Islands Winter School of Astrophysics on "The Emission Line Universe", J. Cepa and F.
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Cold fronts: probes of plasma astrophysics in galaxy clusters [PDF]
Journal of Plasma Physics, 2016 The most massive baryonic component of galaxy clusters is the ‘intracluster medium’ (ICM), a diffuse, hot, weakly magnetized plasma that is most easily observed in the X-ray band. Despite being observed for decades, the macroscopic transport properties of the ICM are still not well constrained.
Roediger, Elke, ZuHone, John A.
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Multivariate Approaches to Classification in Extragalactic Astronomy
Frontiers in Astronomy and Space Sciences, 2015 Clustering objects into synthetic groups is a natural activity of any science. Astrophysics is not an exception and is now facing a deluge of data. For galaxies, the one-century old Hubble classification and the Hubble tuning fork are still largely in ...
Didier eFraix-Burnet +3 more
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ASSESSING ASTROPHYSICAL UNCERTAINTIES IN DIRECT DETECTION WITH GALAXY SIMULATIONS [PDF]
The Astrophysical Journal, 2016 ABSTRACT We study the local dark matter velocity distribution in simulated Milky Way-mass galaxies, generated at high resolution with both dark matter and baryons. We find that the dark matter in the solar neighborhood is influenced appreciably by the inclusion of baryons, increasing the speed of dark matter particles compared to dark ...
Jonathan D. Sloane +3 more
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THE THEORETICAL ASTROPHYSICAL OBSERVATORY: CLOUD-BASED MOCK GALAXY CATALOGS* [PDF]
The Astrophysical Journal Supplement Series, 2016 ABSTRACT We introduce the Theoretical Astrophysical Observatory (TAO), an online virtual laboratory that houses mock observations of galaxy survey data. Such mocks have become an integral part of the modern analysis pipeline. However, building them requires expert knowledge of galaxy modeling and simulation techniques, significant ...
Bernyk, Maksym +9 more
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