Results 91 to 100 of about 283,385 (230)
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 1, March 2026.ABSTRACT This study presents a numerical investigation of passive scalar mixing in homogeneous isotropic turbulence (HIT). Different volumetric forcing schemes have been used in the literature, but the side effects are rarely discussed, either because these are assumed irrelevant or because it is too costly to conduct such an analysis with a high ...
Abhishek Joshi +2 more
wiley +1 more source
Observational Evidence for Spin Alignment between Galaxy Groups and Their Central Galaxies
The Astrophysical Journal LettersWe present a systematic observational study of the spin alignment between galaxy groups and their central galaxies using a large spectroscopic sample from the Sloan Digital Sky Survey.
Peng Wang
doaj +1 more source
A Re‐Examination of Foundational Elements of Cosmology
Fortschritte der Physik, Volume 74, Issue 3, March 2026.ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley +1 more source
On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies
The Astrophysical JournalObserved and simulated galaxies exhibit a significant variation in their velocity dispersion profiles. We examine the inner and outer slopes of stellar velocity dispersion profiles using integral field spectroscopy data from two surveys, SAMI (for z < 0 ...
San Han +10 more
doaj +1 more source
Kinematic Distances of Galaxies in the Local Volume
AstrophysicsWe consider the kinematic distances to nearby galaxies obtained by the Numerical Action Method (NAM) based on the Cosmic-flow-3 survey data. NAM distances are compared with 418 high-precision distances measured by the Tip of the Red Giant Branch (TRGB) method using the Hubble Space Telescope.
Karachentsev, I. D., Popova, A. A.
openaire +2 more sources
Identifying Signatures of Inflow onto Face-on Galaxies Using the Balmer Decrement
The Astrophysical JournalIsolated star-forming galaxies require inflows of fresh gas from the surrounding medium to sustain episodes of star formation over time. However, there are very few direct detections of accretion onto external galaxies.
Meghna Sitaram +6 more
doaj +1 more source
The relationship between Gas and Galaxies [PDF]
, 2009 We have investigated the 2D 2-point correlation function, ƐAG, between low column density Lya absorbers and galaxies at a redshift z ~ 1 for the first time.
Shone, Allen Maurice
core
Kinematics of edge-on galaxy disks
, 2002 We have obtained optical spectra and H I maps for a sample of edge-on spirals. Together with existing photometry, this data allows us to study simultaneously the 3D structure and the kinematics of galaxy disks. This is briefly illustrated for IC 2531.
Kregel, M, van der Kruit, PC
core +2 more sources
Exploration of Halo Substructures in Integrals-of-motion Space with Gaia Data Release 3
The Astrophysical JournalUsing kinematic data from the Gaia Data Release 3 catalog, along with metallicity estimates robustly derived from Gaia BP/RP spectra, we have explored the Galactic stellar halo in search of both known and potentially new substructures.
Haoyang Liu +4 more
doaj +1 more source
The Vertical Structure and Kinematics of the Galaxy [PDF]
Symposium - International Astronomical Union, 1994 A sample including 2370 stars with (U, V) velocities has been analyzed up to z = 2.5 kpc. It is shown that the observed vertical gradient in the velocity distribution can be explained by the sum of 3 discrete populations with constant kinematics. The observations are well fitted by
openaire +1 more source