The local galaxy density and the bars of spiral galaxies
The Astrophysical Journal, 1993 23 pages, LaTeX, SISSA Ref.
GIURICIN G +3 more
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A simple model of spiral galaxies from geometric optics
AIP AdvancesWe propose a simple model of spiral galaxies based on the interference of gravitational waves. The interference is deduced from geometric optics analysis of the refractive index profiles that mimic the behavior of gravitational potentials −1/r and r2. We
Bogdan Szafraniec, James N. Blake
doaj +1 more source
The influence of the cluster environment on the star formation efficiency of 12 Virgo spiral galaxies [PDF]
, 2012 The influence of the environment on gas surface density and star formation efficiency of cluster spiral galaxies is investigated. We extend previous work on radial profiles by a pixel-to pixel analysis looking for asymmetries due to environmental ...
B. V. .. O. I. Wong +17 more
semanticscholar +1 more source
The present-day galaxy population in spiral galaxies [PDF]
AIP Conference Proceedings, 2009 Although there are many more stellar population studies of elliptical and lenticular galaxies, studies of spiral galaxies are catching up, due to higher signal to noise data on one hand, and better analysis methods on the other. Here I start by discussing some modern methods of analyzing integrated spectra of spiral galaxies, and comparing them with ...
Reynier Peletier +7 more
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HST Photometry and Keck Spectroscopy of the Rich Cluster MS1054-03: Morphologies, Butcher-Oemler Effect and the Color-Magnitude Relation at z=0.83 [PDF]
, 2000 We present a study of 81 I selected, spectroscopically-confirmed members of the X-ray cluster MS1054-03 at z=0.83. Redshifts and spectral types were determined from Keck spectroscopy.
Andreon S. +15 more
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A Comprehensive Analysis on the Nature of the Spiral Arms in NGC 3686, NGC 4321, and NGC 2403
GalaxiesIn theoretical investigations, various mechanisms have been put forward to explain the emergence of spiral patterns in galaxies. One of the few ways to find out the nature of spirals in a particular galaxy is to consider the so-called corotation radius ...
Valeria Kostiuk +3 more
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Modified Newtonian Dynamics: A Falsification of Cold Dark Matter
Advances in Astronomy, 2009 The only viable alternative to dark matter is one in which Newtonian dynamics or gravity breaks down in the limit of low accelerations, as in modified Newtonian dynamics (MONDs).
R. H. Sanders
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A DIVERSITY OF PROGENITORS AND HISTORIES FOR ISOLATED SPIRAL GALAXIES [PDF]
, 2012 We analyze a suite of 33 cosmological simulations of the evolution of Milky-Way-mass galaxies in low-density environments. Our sample spans a broad range of Hubble types at z = 0, from nearly bulgeless disks to bulge-dominated galaxies.
M. Martig +4 more
semanticscholar +1 more source
Stellar Populations in Spiral Galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 Abstract We report preliminary results of the characterization of bulge and inner disk stellar populations for 8 nearby spiral galaxies using Gemini/GMOS. The long-slit spectra extend out to 1–2 disk scale lengths with S/N/Å>50. Two different model fitting techniques, absorption-line indices and full spectral synthesis, are found to weigh age ...
J. Jesús González +2 more
openaire +3 more sources
Constraints on the Decomposition of the Rotation Curves of Spiral Galaxies
, 2002 I discuss anew how arguments about the internal dynamics of galactic disks set constraints on the otherwise ambiguous decomposition of the rotation curves of spiral galaxies into the contributions by the various constituents of the galaxies.
Fuchs, B.
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