Results 61 to 70 of about 165,947,395 (159)

Analysis of the two degree field galaxy redshift survey [PDF]

open access: yes, 2001
In this Thesis we analyse in detail the Anglo-Australian 2 degree Field Galaxy Redshift Survey (2dFGRS). The goal of this survey is to measure all galaxy redshifts for the 250 000 galaxies brighter than b(_J) = 19.45 spread over ~ 2000 square degrees. At
Norberg, Iohn Peder Ragnar
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Some statistical properties of spiral galaxies

open access: yes, 1999
This paper presents some statistical correlations of 72 northern spiral galaxies. The results show that early-type spirals that are brighter, and thicker, and the axis ratios (H-z/H-r) of the disk tend to be smaller along the Hubble sequence.
Peng, QH, Zhao, JL, Shu, CG, Ma, J
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Astrophysics and cosmology with galaxy clusters: the WFXT perspective

open access: yes, 2010
12 pages, 6 figures, Proceedings of "The Wide Field X-ray Telescope Workshop", held in Bologna, Italy, Nov. 25-26 2009. To appear in Memorie della Societ\`a Astronomica Italiana 2010 (arXiv:1010.5889)
Borgani, S.   +4 more
openaire   +2 more sources

Worldwide Fulltext Usage of Data Astrophysics Data System in 2008

open access: yes
The data contained in these files (one in Excel, the other in JSON format) consists of full text download numbers through the ADS during the year 2008. Every row is a journal, indicated by the journal name and the ADS abbreviation ("bibstem", see: http://
SAO/NASA Astrophysics Data System
core   +1 more source

Clustering and redshift-space distortions in QSO and galaxy surveys [PDF]

open access: yes, 2006
In this thesis, we exploit the potential of existing QSO and galaxy surveys for investigating the nature of the large scale structure in the Universe. A detailed analysis of clustering and redshift- space distortions allows us to constrain cosmological ...
Cruz da Angela, José Antonio   +1 more
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Astrophysics is easy! an introduction for the amateur astronomer

open access: yes, 2007
With some justification, many amateur astronomers believe astrophysics is a very difficult subject, requiring at least degree-level mathematics to understand it properly. This isn’t necessarily the case.
Inglis, Mike
core   +1 more source

Galaxy clusters as astrophysical laboratories and probes of cosmology [PDF]

open access: yes, 2014
Galaxy clusters are the most recent of cosmological structures to have formed by the present time in the currently favoured hierarchical scenario of structure formation and are widely regarded as powerful probes of cosmology and galaxy formation physics alike.
openaire   +1 more source

An optical and infrared analysis of blue compact dwarf galaxies [PDF]

open access: yes, 2010
An understanding of Blue Compact Dwarf galaxies (BCDs) and the processes occurring within their chemically un-evolved environments is fundamental in our understanding of the early universe.
James, B.L.
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Introduction to black hole astrophysics

open access: yes, 2013
This book is based on the lecture notes of a one-semester course on black hole astrophysics given  by the author and is aimed at advanced undergraduate and graduate students with an interest in astrophysics.
Vila, Gabriela S   +3 more
core   +1 more source

Molecular hydrogen in galaxies [PDF]

open access: yes, 1987
This study aims to understand the key role played by molecular hydrogen in the evolution of galaxies, with a view to constraining its radial distribution in the Galaxy and the CO→H(_2) conversion factor α(_20).The star formation rate is shown to be ...
Wilkinson, David Adam, Wilkinson, D.A
core  

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