Results 61 to 70 of about 1,105 (188)
Projection effects in barred galaxies cause the wrong interpretation of radial flows
Astronomy & AstrophysicsGalaxy disks in rotation are sometimes the site of radial flows, especially in their gas component. It is important to estimate the outflows, due to active galactic nucleus or supernovae feedback, or the inflows, due to bar gravity torques.
Salibur E., Hallé A., Combes F.
doaj +1 more source
Distribution and Kinematics of Classical Cepheids in the Galactic Outer Ring
Open Astronomy, 2015 The existence of an outer ring in the Galaxy can explain the kinematics of OB associations in the Perseus and Sagittarius stellar-gas complexes. Moreover, it can also explain the orientation of the Carina arm with respect to the major axis of the bar. We
Mel’nik A. M. +4 more
doaj +1 more source
Scandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 2, February 2026.ABSTRACT During gait, the temporal patterns of stride‐to‐stride fluctuations and muscle activation exhibit similar responses. This study examined if increasing task demands such as fatigued high intensity running affects this relationship. Eleven experienced runners completed two 400‐m runs (R1, R2) with a 3‐min break to induce fatigue.
Christos Chalitsios +3 more
wiley +1 more source
The Astrophysical JournalOne of the biggest challenges in cosmology, the Hubble tension, requires independent measurements of H _0 , and strong lensing with time-delay cosmography is a promising avenue.
Vishal Verma, Quinn Minor
doaj +1 more source
IET Biometrics, Volume 2026, Issue 1, 2026.Human activity recognition (HAR) is a core technology in fields such as smart healthcare and human–computer interaction, which aims to classify daily activities (e.g., walking and running) based on sensor data automatically. While existing approaches achieve high accuracy in controlled laboratory settings, they often perform poorly in real‐world ...
Yuyang Zhang +3 more
wiley +1 more source
Kinematics of Nuclei of Sc Galaxies [PDF]
Highlights of Astronomy, 1980 For a sample of 21 Sc galaxies with a wide range of luminosities, of radii, and of masses, W. K. Ford and I have obtained spectra and determined rotation curves. By their kinematical behavior in their central regions, the Sc’s can be separated into two groups. Some galaxies, generally small and of low luminosity, have shallow central velocity gradients,
openaire +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
Rotation Curves of Galaxies: A New Theoretical Approach and Comparison With Observations
Advances in Astronomy, Volume 2026, Issue 1, 2026.Observational results on the rotation curve of a rotating galaxy are used in thought experiments. A binary system is inserted in the galaxy, and equations for radial accelerations of the two bodies are found. Similarly, a single body is inserted in a multicomponent galaxy, and an equation for radial acceleration of the body is discussed.
J. Klačka, Sándor Frey
wiley +1 more source
When is a Bulge Not a Bulge? Revealing the Satellite Nature of NGC 5474’s Bulge
The Astrophysical JournalA satellite galaxy of the nearby spiral M101, NGC 5474 has a prominent bulge offset from the kinematic center of the underlying star-forming disk that has gained attention in recent years.
Ray Garner III +2 more
doaj +1 more source
Ecology and Evolution, Volume 15, Issue 12, December 2025.This study was conducted in an extremely heterogeneous karst forest ecosystem. We found asynchronous changes in taxonomic and functional dissimilarities along the succession pathway and the functional redundancy dominated the functional resemblance structure.
Rui Yang +6 more
wiley +1 more source