Results 61 to 70 of about 748,617 (204)
Untangling galaxy components: full spectral bulge-disc decomposition [PDF]
To ascertain whether photometric decompositions of galaxies into bulges and discs are astrophysically meaningful, we have developed a new technique to decompose spectral data cubes into separate bulge and disc components, subject only to the constraint ...
M. Tabor+5 more
semanticscholar +1 more source
Counter-orbiting tidal debris as the origin of the MW DoS
The Milky Way satellite galaxies show a phase-space distribution that is not expected from the standard scenario of galaxy formation. This is a strong hint at them being of tidal origin, which would naturally explain their spacial distribution in a disc ...
Pawlowski M.S.
doaj +1 more source
The Milky Way Galaxy as a Strong Gravitational Lens [PDF]
We study the gravitational lensing effects of spiral galaxies by taking a model of the Milky Way and computing its lensing properties. The model is composed of a spherical Hernquist bulge, a Miyamoto-Nagai disc and an isothermal halo. As a strong lens, a
Evans, N. W., Shin, E. M.
core +2 more sources
Disc galaxy modelling with a particle-by-particle made-to-measure method [PDF]
We have developed the initial version of a new particle-by-particle adaptation of the made-to-measure (M2M) method, aiming to model the Galactic disc from upcoming Galactic stellar survey data.
Jason A. S. Hunt, D. Kawata
semanticscholar +1 more source
Cores and revived cusps of dark matter haloes in disc galaxy formation through clump clusters [PDF]
The cusp–core problem is a controversial problem in galactic dark matter haloes. Cosmological N-body simulations have demonstrated that galactic dark matter haloes have a cuspy density profile at the centre.
Shigeki Inoue, T. Saitoh
semanticscholar +1 more source
Galactic fountains and the rotation of disc-galaxy coronae [PDF]
In galaxies like the Milky Way, cold (˜104 K) gas ejected from the disc by stellar activity (the so-called galactic-fountain gas) is expected to interact with the virial-temperature (˜106 K) gas of the corona.
F. Marinacci+5 more
semanticscholar +1 more source
We present the first 3D hydrodynamical simulations of ram pressure stripping of a disc galaxy orbiting in a galaxy cluster. Along the orbit, the ram pressure that this galaxy experiences varies with time.
Abadi+26 more
core +1 more source
Hierarchical formation of bulgeless galaxies II: Redistribution of angular momentum via galactic fountains [PDF]
Within a fully cosmological hydrodynamical simulation, we form a galaxy which rotates at 140 km/s, and is characterised by two loose spiral arms and a bar, indicative of a Hubble Type SBc/d galaxy. We show that our simulated galaxy has no classical bulge,
Brook, C. B.+5 more
core +3 more sources
A review of elliptical and disc galaxy structure, and modern scaling laws [PDF]
A century ago, in 1911 and 1913, Plummer and then Reynolds introduced their models to describe the radial distribution of stars in `nebulae'. This article reviews the progress since then, providing both an historical perspective and a contemporary review
A. Graham
semanticscholar +1 more source
Modeling disc non-axisymmetries: Multiple patterns, radial migration, and thick disks
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