Results 31 to 40 of about 11,976,045 (293)
THE STRUCTURE AND KINEMATICS OF THE CIRCUMGALACTIC MEDIUM FROM FAR-ULTRAVIOLET SPECTRA OF z ≃ 2–3 GALAXIES [PDF]
, 2010 We present new results on the kinematics and spatial distribution of metal-enriched gas within ∼125 kpc of star-forming (“Lyman break”) galaxies at redshifts 2 ≲ z ≲ 3.
C. Steidel +7 more
semanticscholar +1 more source
Dark Matter Self-interactions and Small Scale Structure [PDF]
, 2017 We review theories of dark matter (DM) beyond the collisionless paradigm, known as self-interacting dark matter (SIDM), and their observable implications for astrophysical structure in the Universe.
S. Tulin, Hai-Bo Yu
semanticscholar +1 more source
Spiral structure in nearby galaxies – II. Comparative analysis and conclusions [PDF]
, 2014 This paper presents a detailed analysis of two-armed spiral structure in a sample of galax- ies from the Spitzer Infrared Nearby Galaxies Survey (SINGS), with particular focus on the relationships between the properties of the spiral pattern in the ...
S. Kendall, Cathie Clarke, R. Kennicutt
semanticscholar +1 more source
STRUCTURE AND FORMATION OF ELLIPTICAL AND SPHEROIDAL GALAXIES [PDF]
, 2008 New surface photometry of all known elliptical galaxies in the Virgo cluster is combined with published data to derive composite profiles of brightness, ellipticity, position angle, isophote shape, and color over large radius ranges. These provide enough
J. Kormendy +3 more
semanticscholar +1 more source
Populating a cluster of galaxies - I. Results at z=0 [PDF]
, 2000 ABSTRA C T We simulate the assembly of a massive rich cluster and the formation of its constituent galaxies in a flat, low-density universe. Our most accurate model follows the collapse, the star formation history and the orbital motion of all galaxies ...
V. Springel +5 more
semanticscholar +1 more source
The Structure of Dark Matter Halos in Dwarf Galaxies [PDF]
, 1995 Recent observations indicate that dark matter halos have flat central density profiles. Cosmological simulations with nonbaryonic dark matter, however, predict self-similar halos with central density cusps.
A. Burkert
semanticscholar +1 more source
Spiral Structure of Our Galaxy and of Other Galaxies [PDF]
Symposium - International Astronomical Union, 1970 Time and again Dr. B. Bok publishes his reviews on the state of optical searches of the spiral arms in our Galaxy. A great optimist at the beginning, concerning the agreement of different results, he became later more critical in his conclusions. But in his paper of 1967 he claims anew, as well established, that we can trace the spiral arms up to a ...
openaire +1 more source
Galaxy structures — groups, clusters and superclusters [PDF]
International Journal of Geometric Methods in Modern Physics, 2014 We provide a brief summary of the history of galaxy structure studies. We also introduce several large-scale redshift surveys and summarize the most commonly used methods to identify the groups and clusters of galaxies. We present several catalogs of galaxy groups. These catalogs can be used to study the galaxy groups in different environments.
Sepp, Tiit, Gramann, Mirt
openaire +2 more sources
RECONCILING DWARF GALAXIES WITH ΛCDM COSMOLOGY: SIMULATING A REALISTIC POPULATION OF SATELLITES AROUND A MILKY WAY–MASS GALAXY [PDF]
, 2016 Low-mass “dwarf” galaxies represent the most significant challenges to the cold dark matter (CDM) model of cosmological structure formation. Because these faint galaxies are (best) observed within the Local Group (LG) of the Milky Way (MW) and Andromeda (
A. Wetzel +5 more
semanticscholar +1 more source
Cool Gas in High-Redshift Galaxies [PDF]
, 2013 Over the past decade, observations of the cool interstellar medium (ISM) in distant galaxies via molecular and atomic fine structure line (FSL) emission have gone from a curious look into a few extreme, rare objects to a mainstream tool for studying ...
C. Carilli, F. Walter
semanticscholar +1 more source