Results 111 to 120 of about 43,226 (214)
The Intrinsic Ellipticity of Spiral Disks [PDF]
, 2002 We have measured the distribution of intrinsic ellipticities for a sample of 28 relatively face-on spiral disks. We combine H-alpha velocity fields and R and I-band images to determine differences between kinematic and photometric inclination and ...
Andersen, David R., Bershady, Matthew A.
core +2 more sources
The Dark Disk of the Milky Way
, 2009 Massive satellite accretions onto early galactic disks can lead to the deposition of dark matter in disk-like configurations that co-rotate with the galaxy. This phenomenon has potentially dramatic consequences for dark matter detection experiments.
Bruch +15 more
core +1 more source
A Turbulent Framework for Star Formation in High-redshift Galaxies
The Astrophysical JournalObservations of distant galaxies suggest that the physics of galaxy formation at high redshifts differs significantly from later times. In contrast to large, steady disk galaxies like the Milky Way, high-redshift galaxies are often characterized by ...
Guochao Sun +2 more
doaj +1 more source
Galaxy Zoo: Bars in Disk Galaxies
, 2010 We present first results from Galaxy Zoo 2, the second phase of the highly successful Galaxy Zoo project (www.galaxyzoo.org).
Masters, Karen L. +10 more
openaire +5 more sources
Formation and Evolution of Disk Galaxies [PDF]
Proceedings of the International Astronomical Union, 2003 AbstractGlobal star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae. Primary observational constraints on disk galaxy formation and evolution include the Schmidt-Kennicutt law, the ...
openaire +4 more sources
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
The Thickness of Galaxy Disks from z = 5 to 0 Probed by JWST
The Astrophysical Journal LettersAlthough a thick disk is a structure prevalent in local disk galaxies and also present in our home Galaxy, its formation and evolution are still unclear.
Jianhui Lian, Li Luo
doaj +1 more source
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
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