Results 101 to 110 of about 49,590 (221)

The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang, Weihao Liu, Jingnan Guo, Mikhail Dobynde, Robert F. Wimmer‐Schweingruber   +4 more
wiley   +1 more source

SIMULATIONS OF LARGE-SCALE GASEOUS STRUCTURES WITH SPH

Odessa 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

Confirmation of Enhanced Dwarf-sensitive Absorption Features in the Spectra of Massive Elliptical Galaxies: Further Evidence for a Non-universal Initial Mass Function

, 2011
We recently found that massive cluster elliptical galaxies have strong Na I 8183,8195 and FeH 9916 Wing-Ford band absorption, indicating the presence of a very large population of stars with masses
Buitrago, Caldwell, Conroy, Dutton, Graves, Holden, Hopkins, Oser, Rayner, Schiavon, Schiavon, Strader, Thomas, Trager, Treu, van der Wel, van Dokkum, van Dokkum, van Dokkum   +18 more
core   +1 more source

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

The 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, Alessia Gualandris, Justin I. Read, Walter Dehnen   +3 more
doaj   +1 more source

THE ELLIPTICITIES OF GALAXIES IN GALAXY CLUSTERS OF DIFFERENT MORPHOLOGICAL TYPE

Odessa 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 New Empirical Model for the Structural Analysis of Early-type Galaxies and a Critical Review of the Nuker Model

, 2003
The Nuker law was designed to match the inner few (~3-10) arcseconds of predominantly nearby (< 30 Mpc) early-type galaxy light-profiles; it was never intended to describe an entire profile.
A. Asensio Ramos, Alister W. Graham, Andredakis Y. C., Binggeli B., Caon N., Caon N., D'Onofrio M., Davies J. I., de Vaucouleurs G., I. Trujillo, James P. A., Marquez I., Peter Erwin, Young C. K., Zhao H., Zhao H.   +15 more
core   +1 more source

ELLIPTICITIES OF ELLIPTICAL GALAXIES IN DIFFERENT ENVIRONMENTS

The Astrophysical Journal, 2016
ABSTRACT We studied the ellipticity distributions of elliptical galaxies in different environments. From the ninth data release of the Sloan Digital Sky Survey, we selected galaxies with absolute -band magnitudes between −21 and −22.
Cheng-Yu Chen, Chorng-Yuan Hwang, Chung-Ming Ko   +2 more
openaire   +1 more source

A simple model of spiral galaxies from geometric optics

AIP 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

Galaxies, 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

The Carnegie-Irvine Galaxy Survey. III. The Three-Component Structure of Nearby Elliptical Galaxies

, 2012
Motivated by recent developments in our understanding of the formation and evolution of massive galaxies, we explore the detailed photometric structure of a representative sample of 94 bright, nearby elliptical galaxies, using high-quality optical images
Barth, Aaron J., Ho, Luis C., Huang, Song, Li, Zhao-Yu, Peng, Chien Y.   +4 more
core   +1 more source