Results 51 to 60 of about 143,457 (288)
Effects of feedback on the morphology of galaxy discs [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 We have performed hydrodynamic simulations of galaxy formation in a LCDM universe. We have followed galaxy formation in a dark matter halo, chosen to have a relatively quiet recent merger history, using different models for star formation and feedback. In all cases, we have adopted a multi-phase description of the interstellar medium and modelled star ...
Carlos S. Frenk +3 more
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The large-scale orientations of disc galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 ISSN:0035 ...
Oliver Hahn +4 more
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Galaxy Zoo: finding offset discs and bars in SDSS galaxies★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We use multi-wavelength SDSS images and Galaxy Zoo morphologies to identify a sample of $\sim$$270$ late-type galaxies with an off-centre bar. We measure offsets in the range 0.2-2.5 kpc between the photometric centres of the stellar disc and stellar bar.
Lucy Fortson +13 more
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Modeling disc non-axisymmetries: Multiple patterns, radial migration, and thick disks
EPJ Web of Conferences, 2012 Disc non-axisymmetric components, such as spirals and central bars, are nowadays known to play an important role in shaping galactic discs. Here we use Tree-SPH N-body simulations to examine the effect of these perturbers on two aspects: the occurrence ...
Dehnen W. +3 more
doaj +1 more source
Long photometric cycles in hot algols [PDF]
Serbian Astronomical Journal, 2017 We summarize the development of the field of Double Periodic Variables (DPVs, Mennickent et al. 2003) during the last fourteen years, placing these objects in the context of intermediate-mass close interacting binaries similar to β Persei (Algol)
Mennickent R.E.
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Long-Time Evolution of Gas-Free Disc Galaxies in Binary Systems [PDF]
, 2013 We present the results of several detailed numerical N-body simulations of the dynamical interactions of two equal mass disc galaxies. Both galaxies are embedded in spherical halos of dark matter and contain central bulges. Our analysis of the dynamical evolution of the binary system focuses on the morphological evolution of the stellar distribution of
arxiv +1 more source
Numerical Modelling of the Vertical Structure and Dark Halo Parameters in Disc Galaxies [PDF]
Astronomische Nachrichten 331 (2010), 731-745, 2010 The non-linear dynamics of bending instability and vertical structure of a galactic stellar disc embedded into a spherical halo are studied with N-body numerical modelling. Development of the bending instability in stellar galactic disc is considered as the main factor that increases the disc thickness.
arxiv +1 more source
The lifetimes of spiral patterns in disc galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 The rate of internally-driven evolution of galaxy discs is strongly affected by the lifetimes of the spiral patterns they support. Evolution is much faster if the spiral patterns are recurrent short-lived transients rather than long-lived, quasi-steady features.
openaire +3 more sources
Was the progenitor of the Sagittarius stream a disc galaxy? [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2010 Abstract We use N-body simulations to explore the possibility that the Sagittarius (Sgr) dwarf galaxy was originally a late-type, rotating disc galaxy, rather than a non-rotating, pressure-supported dwarf spheroidal galaxy, as previously thought.
Gerard Gilmore +8 more
openaire +4 more sources
Galaxies, 2021 Radio galaxies are known to undergo phases of activity, where the stage after the jets have switched off is referred to as the remnant phase. This state can be followed by a restarted phase when the activity reignites. Remnant and restarted radio sources
Nika Jurlin +3 more
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