Results 41 to 50 of about 410,793 (220)
The HI Halo of Spiral Galaxies
Astrophysics and Space Science, 2004 The results of observational studies on the vertical HI density distribution and kinematics of the disks of spiral galaxies are reported and discussed. Attention is drawn to the presence of HI emission, unknown before and here referred to as the `beard', which has anomalous structure and kinematics, different from the known cold HI disk. This component
Gustaaf van Moorsel +3 more
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The DiskMass Survey VII. The distribution of luminous and dark matter in spiral galaxies [PDF]
, 2013 We present dynamically-determined rotation-curve mass decompositions of 30 spiral galaxies, which were carried out to test the maximum-disk hypothesis and to quantify properties of their dark-matter halos.
T. Martinsson +5 more
semanticscholar +1 more source
The optical polarization of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 Scattering of starlight by dust, molecules and electrons in spiral galaxies will produce a modification of the direct intensity and a polarization in the observed light. We treat the case where the distribution of scatterers can be considered to be optically thin, and derive semi-analytic expressions for the resolved intensity and polarized intensity ...
Edouard Audit, John F. L. Simmons
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FUNDAMENTAL MASS–SPIN–MORPHOLOGY RELATION OF SPIRAL GALAXIES [PDF]
, 2013 This work presents high-precision measurements of the specific baryon angular momentum jb contained in stars, atomic gas, and molecular gas, out to ≳ 10 scale radii, in 16 nearby spiral galaxies of the THINGS sample.
D. Obreschkow, K. Glazebrook
semanticscholar +1 more source
Nuclear Spirals in Galaxies [PDF]
, 2008 6 pages, 4 figures, to appear in ""Mapping the Galaxy and Nearby Galaxies", Eds. K. Wada and F.
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Towards a more realistic population of bright spiral galaxies in cosmological simulations [PDF]
, 2013 We present an update to the multiphase SPH galaxy formation code by Scannapieco et al. We include a more elaborate treatment of the production of metals, cooling rates based on individual element abundances, and a scheme for the turbulent diffusion of ...
M. Aumer +3 more
semanticscholar +1 more source
Assembling Spiral Galaxies [PDF]
Symposium - International Astronomical Union, 1996 Nearby spiral galaxies offer vital clues to some of the most fundamental questions about galaxy formation and evolution: What is the star formation history of the universe, past and future? When did disks form, during the final stages of a single primeval collapse, or as a continuous or episodic process?
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ULTRALIGHT SCALARS AND SPIRAL GALAXIES [PDF]
Modern Physics Letters A, 2001 We study some possible astrophysical implications of a very weakly coupled ultralight dilaton-type scalar field. Such a field may develop an (approximately stable) network of domain walls. The domain wall thickness is assumed to be comparable with the thickness of the luminous part of the spiral galaxies. The walls provide trapping for galactic matter.
Gregory Gabadadze +2 more
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The different star formation histories of blue and red spiral and elliptical galaxies [PDF]
, 2013 We study the spectral properties of intermediate mass galaxies (M* ∼ 1010.7 M⊙) as a function of colour and morphology. We use Galaxy Zoo to define three morphological classes of galaxies, namely early types (ellipticals), late-type (disc-dominated) face-
R. Tojeiro +8 more
semanticscholar +1 more source
Exploring the evolution of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages and metallicities are derived in the same way as the data.
Eric F. Bell +2 more
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