Results 51 to 60 of about 89 (86)

Non‐Negligible Influence of Forcing Mechanisms on Turbulent Mixing at Low Reynolds Numbers: A One‐Dimensional Turbulence Study

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, Marten Klein, Heiko Schmidt   +2 more
wiley   +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

From nearby to distant galaxies: kinematical and dynamical studies

, 2009
Kinematical studies of low and high redshift galaxies enables to probe galaxy formation and evolution scenarios. Integral field spectroscopy is a powerful tool to study with accuracy nearby galaxies kinematics. Recent observations also gives a new 2D vision of high redshift galaxies kinematics.
openaire   +2 more sources

Shell galaxies: kinematical signature of shells, satellite galaxy disruption and dynamical friction

, 2013
Stellar shells observed in many giant elliptical and lenticular as well as a few spiral and dwarf galaxies presumably result from radial minor mergers of galaxies. We show that the line-of-sight velocity distribution of the shells has a quadruple-peaked shape.
openaire   +2 more sources

Deep Kinematics and Dynamics of Edge-on S0 Galaxies. I. NGC 3115

, 1993
Latex + L-AA Vers.
Capaccioli, M., Cappellaro, E., Held, E. V., Vietri, M.   +3 more
openaire   +2 more sources

The empirical laws of galaxy dynamics: from gas kinematics to weak lensing

Proceedings of the International Astronomical Union
Abstract Galaxies obey a set of strict dynamical laws, which imply a close coupling between the visible matter (stars and gas) and the observed dynamics (set by dark matter in the standard cosmological context). Here we review recent results from weak gravitational lensing, which allow studying the empirical laws of galaxy dynamics ...
Federico Lelli, Tobias Mistele, Stacy S. McGaugh, James M. Schombert, Pengfei Li   +4 more
openaire   +2 more sources

Unifying the dynamical classification of early-type galaxies: Kinematic deficits in IllustrisTNG versus observations

Astronomy & Astrophysics
Aims. This study aims to make a comparative analysis of galaxy kinematics using IllustrisTNG simulations and integral-field spectroscopy (IFS) observations. Methods.
Wenyu Zhong, Min Du, Shengdong Lu, Yunpeng Jin, Kai Zhu   +4 more
openaire   +2 more sources

Galaxies: kinematics to dynamics [PDF]

, 2001
openaire   +1 more source

A Unified Empirical Timescale for Galaxy Dynamics from Kinematic Scale Competition

Abstract We define a unified, empirically constructed dynamical observable τ, expressed as a signed characteristic timescale (in Myr), derived from two structural scales extracted directly from kinematic data: a dynamical coherence length ξ_GL and a baryonic confinement scale r_core.
openaire   +3 more sources

Unveiling the Dynamics and Kinematics of the Barred Spiral Galaxy NGC 1672

Observations of neutral hydrogen (H I) in nearby galaxies provide a powerful tool for studying the kinematics and distribution of H I, helping to improve our understanding of galaxy formation and evolution. The MHONGOOSE Survey has made high resolution observations of low column density gas in 30 nearby dwarf and spiral galaxies, enabling detailed ...
openaire   +1 more source