Results 111 to 120 of about 4,067 (216)
Untangling galaxy components: the kinematics and stellar populations of bulges and disks [PDF]
, 2019 Photometric bulge-disk decompositions have long been used as a way of separating out the central and extended components in a galaxy. However, whether these photometric components are made up of different stellar populations with distinct kinematics, or ...
Tabor, Martha
core
Iron Snails: Nonequilibrium Dynamics and Spiral Abundance Patterns
The Astrophysical JournalGalaxies are not in a dynamical steady state: they continually undergo perturbations, e.g., from infalling dwarf galaxies and dark matter substructure. After a dynamical perturbation, stars phase mix toward a new steady state; in so doing, they generally
Neige Frankel +4 more
doaj +1 more source
Disk galaxy evolution: from the Milky Way to high-redshift disks
, 2003 International audienceWe develop a detailed model of the Milky Way (a `prototypical' disk galaxy) and extend it to other disks with the help of some simple scaling relations, obtained in the framework of Cold Dark Matter models.
Prantzos, Nikos
core +1 more source
A twisted disk equation that describes warped galaxy disks
, 1994 Warped H1 gas layers in the outer regions of spiral galaxies usually display a noticeably twisted structure. This structure is thought to arise primarily as a result of differential precession in the H1 disk as it settles toward a 'preferred orientation'
Barker, K.
core
Investigating the Lower Limit of Metallicity for the Galactic Thin Disk
The Astrophysical JournalWe explore the metal-poor regime of the Galactic disk on the distribution of stars in the [ α /M]– V _ϕ plane, to identify the most metal-poor thin disk (MPTnD) stars belonging to the low- α sequence.
Guozhen Hu +3 more
doaj +1 more source
Here Be SDRAGNs—Spiral Galaxies Hosting Large Double Radio Sources
The Astronomical JournalWe present a sample of large double radio sources hosted by spiral galaxies (spiral double radio active galactic nuclei, SDRAGNs). Candidates were initially selected through the Radio Galaxy Zoo project and subsequently refined using Sloan Digital Sky ...
Jean Tate +18 more
doaj +1 more source
Counter-Rotation in Disk Galaxies
, 2014 Counter-rotating galaxies host two components rotating in opposite directions with respect to each other. The kinematic and morphological properties of lenticulars and spirals hosting counter-rotating components are reviewed. Statistics of the counter-rotating galaxies and analysis of their stellar populations provide constraints on the formation ...
openaire +3 more sources
Relationship between tidal radius and angular momentum in a two component disk-galaxy system
, 2001 Quasi-static evolution of a two component galaxy model is taken into account. The aim is to find a relationship between the tidal radius, induced by the dark matter component on the bright one, and the angular momentum in the two limit cases of late-type
SECCO, LUIGI ENRICO
core
The Astrophysical JournalWe investigate the dynamics of GN-z11, a luminous galaxy at z = 10.60, carefully analyzing the public deep integral field spectroscopy (IFS) data taken with the JWST NIRSpec integral field unit.
Yi Xu +11 more
doaj +1 more source
The Astrophysical Journal LettersUsing numerical simulations of a barred disk galaxy embedded in nonspinning and spinning dark matter (DM) halos, we present a novel mechanism of “cooling” the vertical oscillations of DM particles, which acquire disk kinematics.
Xingchen Li +3 more
doaj +1 more source