Results 41 to 50 of about 787 (130)

Accelerating galaxy dynamical modeling using a neural network for joint lensing and kinematic analyses

Astronomy & Astrophysics, 2023
Strong gravitational lensing is a powerful tool to provide constraints on galaxy mass distributions and cosmological parameters, such as the Hubble constant, H0. Nevertheless, inference of such parameters from images of lensing systems is not trivial as parameter degeneracies can limit the precision in the measured lens mass and cosmological results ...
Gomer, Matthew, Ertl, S., Biggio, L., Wang, H., Galan, A., Van de Vyvere, Lyne, Sluse, Dominique, Vernardos, G., Suyu, S. H.   +8 more
openaire   +5 more sources

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

Kinematics and simulations of the stellar stream in the halo of the umbrella galaxy [PDF]

, 2014
We study the dynamics of faint stellar substructures around the Umbrella Galaxy, NGC 4651, which hosts a dramatic system of streams and shells formed through the tidal disruption of a nucleated dwarf elliptical galaxy.
Merrifield, M. R., Ciardullo, R., Martinez-Delgado, D., Strader, J., Zibetti, S., Singh, N., Foster, C., Lux, H., Romanowsky, A. J., GaBany, R. J., Arnold, J. A., Brodie, J. P.   +11 more
core   +2 more sources

GeoNav: Enhancing field phenotyping with high‐precision global navigation systems integration in the Field Book mobile application

Crop Science, Volume 66, Issue 2, March/April 2026.
Abstract Field data collection is a key activity in plant breeding, underpinning efforts to develop crop varieties with improved yields, disease resistance, and climate adaptability. Accurately associating data with the correct field plots is critical for selection and genetic improvement but can be challenging, especially in large experiments.
Keo Corak, Chaney Courtney, Bryan Ellerbrock, Prasad Kamath, Heather K. Manching, Jesse Poland, Mitchell Neilsen, Amanda M. Hulse‐Kemp, Trevor W. Rife   +8 more
wiley   +1 more source

Three contributions to Galaxy Dynamics: distant galaxy kinematics, mass, and M/L

, 1998
1) Rotation Curves and M/L Evolution for Galaxies to z=0.4, (Bershady, Haynes, Giovanelli, & Andersen) 2) Mass Estimates of Starbursting Galaxies: Line Widths versus Near-IR Luminosities (Jangren, Bershady, & Gronwall) 3) Galaxy Kinematics with Integral Field Spectroscopy (Andersen, Bershady)
Bershady, M. A., Jangren, A., Andersen, D. R., Haynes, M. P., Giovanelli, R., Gronwall, C.   +5 more
openaire   +2 more sources

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

The evolution of dark matter substructure [PDF]

, 2001
This thesis investigates the dynamical evolution of systems orbiting within deeper potentials. Initially we use a simple satellite-halo interaction to study the dynamical processes that act on orbiting systems and we compare these results to analytical ...
Roldán, Carlos Antonio Calcáneo
core  

Kinematics and dynamics of the M51-type galaxy pair NGC 3893/96 (KPG 302)

, 2007
Accepted for publication in A&A. 11 pages, 9 figures and 2 tablesWe study the kinematics and dynamics of the M51-type interacting galaxy pair KPG 302 (NGC 3893/96).
Salo, Heikki, Laurikainen, Eija, H. Salo, Rosado, Margarita, I. Fuentes-Carrera, M. Rosado, Fuentes-Carrera, Isaura, Amram, Philippe, E. Laurikainen, P. Amram   +9 more
core   +1 more source

A Dynamical and Kinematic Model of the Galactic Stellar Halo and Possible Implications for Galaxy Formation Scenarios [PDF]

The Astrophysical Journal, 1997
We re-analyse the kinematics of the system of blue horizontal branch field (BHBF) stars in the Galactic halo (in particular the outer halo), fitting the kinematics with the model of radial and tangential velocity dispersions in the halo as a function of galactocentric distance r proposed by Sommer-Larsen, Flynn & Christensen (1994), using a much ...
Sommer-Larsen, J., Beers, T.C., Flynn, C., Wilhelm, R., Christensen, P.R.   +4 more
openaire   +2 more sources

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