Results 101 to 110 of about 46,922 (223)
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
Minor-axis velocity gradients in spirals and the case of inner polar disks
, 2003 We measured the ionized-gas and stellar kinematics along the major and minor axis of a sample of 10 early-type spirals. Much to our surprise we found a remarkable gas velocity gradient along the minor axis of 8 of them.
A. Pizzella +65 more
core +1 more source
Stellar Motions in the Polar Ring Galaxy NGC 4650A [PDF]
, 2003 We present the first measurement of the stellar kinematics in the polar ring of NGC 4650A. There is well defined rotation, with the stars and gas rotating in the same direction, and with similar amplitude.
Combes F., Rob A. Swaters, Vera C. Rubin
core +1 more source
Journal of Geophysical Research: Atmospheres, Volume 130, Issue 16, 28 August 2025.Abstract In this study, we have investigated short‐period (< ${< } $1 hr) atmospheric gravity waves (AGWs) in the Arctic mesosphere‐lower thermosphere (MLT) region during January of 2014, 2015, and 2016. We used OH (3,1) band emission data from the Advanced Mesospheric Temperature Mapper (AMTM) at the Arctic Lidar Observatory for Middle Atmosphere ...
Subir Mandal +5 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
Two Micron‐Size Dark Dimensions
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui +2 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
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
Compliant Robotics in Space: A Prospective Review of Soft and Deformable Systems for Space Missions
Advanced Intelligent Systems, Volume 7, Issue 7, July 2025.Compliant robots are increasingly becoming integral to space exploration due to their adaptability, flexibility, and lightweight design. This article reviews categories such as soft, reconfigurable, and hyper‐redundant robots and their evolving role in enhancing space missions.
Hamed Rahimi Nohooji, Holger Voos
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