Results 71 to 80 of about 445,447 (209)
Morphological evolution of dwarf galaxies in the Local Group
, 2003 The dwarf galaxies of the Local Group can be separated in three morphological groups: irregular, elliptical and spheroidal. As in the large galaxy clusters, there seems to be a morphology-position relationship: irregular galaxies are preferentially ...
C. Chiosi +5 more
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3D model of magnetic fields evolution in dwarf irregular galaxies [PDF]
, 2010 Radio observations show that magnetic fields are present in dwarf irregular galaxies (dIrr) and its strength is comparable to that found in spiral galaxies.
Otmianowska-Mazur, Katarzyna +9 more
core +1 more source
Pressure and Star Formation in LITTLE THINGS Dwarf Irregular Galaxies
The Astrophysical JournalThe surface densities of star formation, Σ _SFR , in 24 dwarf irregular (dIrr) galaxies from the LITTLE THINGS survey are combined with gas surface densities and midplane pressures to examine the correlations found previously for spiral galaxies.
Bruce G. Elmegreen +2 more
doaj +1 more source
, 1994 the following topics were dealt with: dwarf galaxies, structure formation, galaxy evolution, star formation, dark matter, local dwarf spheroidals, big holes in the H I component of dwarf irregulars, possible discontinuity between normal and dwarf ...
European Southern Observatory, Garching (Germany) +2 more
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Optical BVI imaging and HI synthesis observations of the dwarf irregular galaxy ESO364-G029
, 2007 As part of an effort to enlarge the number of well-studied Magellanic-type galaxies, we obtained broadband optical imaging and neutral hydrogen radio synthesis observations of the dwarf irregular galaxy ESO 364 ...
S. Kim +3 more
core +1 more source
Dark Satellites and the Morphology of Dwarf Galaxies [PDF]
, 2012 One of the strongest predictions of the Delta CDM cosmological model is the presence of dark satellites orbiting all types of galaxies. We focus here on the dynamical effects of such satellites on disky dwarf galaxies, and demonstrate that these ...
Starkenburg, T. K. +12 more
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Pervasive Cavity-rim Structure for Star Formation in Dwarf Irregular Galaxies
The Astrophysical JournalUnsharp-mask images of H I emission from 36 dwarf irregular (dIrr) galaxies illustrate star formation in dispersed clouds and on the rims of large cavities. The cavities can extend for a radial scale length and typically have circular or slightly sheared
Bruce G. Elmegreen, Deidre A. Hunter
doaj +1 more source
Rotationally Supported Virgo Cluster Dwarf Elliptical Galaxies: Stripped Dwarf Irregular Galaxies?
The Astronomical Journal, 2004 New observations of 16 dwarf elliptical galaxies in the Virgo Cluster indicate that at least seven dEs have significant velocity gradients along their optical major axis, with typical rotation amplitudes of 20-30 km/s. Of the remaining nine galaxies in this sample, 6 have velocity gradients less than 20 km/s kpc^{-1} while the other 3 observations had ...
van Zee, L. +2 more
openaire +2 more sources
OLD GLOBULAR CLUSTERS IN MAGELLANIC-TYPE DWARF IRREGULAR GALAXIES
The Astronomical Journal, 2008 We present a study of the old globular clusters (GC) using archival F606W and F814W HST/ACS images of 19 Magellanic-type dwarf Irregular (dIrr) galaxies found in nearby (2 - 8 Mpc) associations of only dwarf galaxies. All dIrrs have absolute magnitudes fainter than or equal to the SMC (Mv = -16.2 mag).
Georgiev, Iskren Y. +3 more
openaire +2 more sources
Testing Evolutionary Models of Dwarf Irregular Galaxies through Gas and Stellar Metallicity Determinations in HII Galaxies [PDF]
, 2017 Dwarf irregular galaxies are usually low-metallicity objects, and show ongoing or very recent star formation, giving rise to their irregular appearance.
Westera, Pieter +3 more
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