Results 81 to 90 of about 5,149 (236)

Unveiling the Evolutionary Lineages and Habitat Dynamics of the Monotypic Crowned River Turtle Hardella thurjii (Gray, 1831) (Testudines: Geoemydidae): Strategic Conservation Insights for an Endangered Freshwater Turtle From Southern Asia

open access: yesEcology and Evolution, Volume 15, Issue 6, June 2025.
This study provides the first complete mitochondrial genome of the monotypic H. thurjii , sequenced using next‐generation technologies. Additionally, it employs ensemble species distribution modeling to evaluate habitat suitability and shape geometry under both current and projected climatic scenarios.
Imon Abedin   +7 more
wiley   +1 more source

Elliptical galaxies with separable potentials [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1985
The perfect ellipsoid is presented: an inhomogeneous triaxial mass model with a gravitational potential that is of Stäckel form. The equations of motion are separable in ellipsoidal coordinates and all stellar orbits have three isolating integrals that are known explicitly.
openaire   +4 more sources

The Radio Wave Polarization of Saturn Lightning Observed by Cassini

open access: yesJournal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer   +4 more
wiley   +1 more source

SIMULATIONS OF LARGE-SCALE GASEOUS STRUCTURES WITH SPH

open access: yesOdessa Astronomical Publications, 2017
A computer programme based on the 3D SPH approach is described. Some numerical results are presented: the formation of gaseous ring around an SO galaxy due to the stripping of a gas-rich donor system.
N. Ya. Sotnikova
doaj   +1 more source

In Situ Analysis of Jupiter's Broadband Kilometric Auroral Radio Emissions With Juno

open access: yesGeophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Among the zoo of Jovian auroral radio emissions, the broadband kilometric (bKOM) component has been the least studied. Taking advantage of Juno in situ measurements within the auroral regions, we surveyed the Juno/Waves radio observations over the 60 first orbits to identify 7 bKOM source candidates.
B. Collet   +4 more
wiley   +1 more source

Core Formation by Binary Scouring and Gravitational Wave Recoil in Massive Elliptical Galaxies

open access: yesThe Astrophysical Journal
Scouring by supermassive black hole (SMBH) binaries is the most accepted mechanism for the formation of the cores seen in giant elliptical galaxies. However, an additional mechanism is required to explain the largest observed cores.
Nader Khonji   +3 more
doaj   +1 more source

THE ELLIPTICITIES OF GALAXIES IN GALAXY CLUSTERS OF DIFFERENT MORPHOLOGICAL TYPE

open access: yesOdessa Astronomical Publications, 2014
The distribution of galaxy ellipticities was analyzed for 207 rich PF galaxy clusters found in the Munster Red Sky Survey Galaxy Catalogue. Clusters with BM types from a comparison with the ACO catalogue were also classified on the new scheme.
E. A. Panko, P. Flin
doaj   +1 more source

A simple model of spiral galaxies from geometric optics

open access: yesAIP Advances
We propose a simple model of spiral galaxies based on the interference of gravitational waves. The interference is deduced from geometric optics analysis of the refractive index profiles that mimic the behavior of gravitational potentials −1/r and r2. We
Bogdan Szafraniec, James N. Blake
doaj   +1 more source

The SLUGGS Survey: Understanding Lenticular Galaxy Formation via Extended Stellar Kinematics

open access: yesGalaxies, 2017
We present the latest published and preliminary results from the SLUGGS Survey discussing the formation of lenticular galaxies through analysis of their kinematics.
Sabine Bellstedt
doaj   +1 more source

Compact Elliptical Galaxies

open access: yes, 2015
In this thesis, a sample of nearby, compact, elliptical galaxies with high central stellar velocity dispersions are studied. By means of high quality photometric and spectroscopic observations, we analyse their structural properties and construct state-of-the-art orbit-based dynamical models to constrain their total mass budgets, including the ...
openaire   +2 more sources

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