Results 231 to 240 of about 19,184 (264)
Some of the next articles are maybe not open access.
Mass determination in galaxies, groups of galaxies, and clusters of galaxies
IEEE Transactions on Plasma Science, 1990Computer simulations of interacting galaxies are used to determine the contribution of halos in disk galaxies. It appears that generally the halo is less massive than the disk. Redshift asymmetries are used to separate binary pairs from optical pairs in catalogs of galaxy pairs.
M.J. Valtonen, G.G. Byrd
openaire +1 more source
Infrared Galaxies in Compact Groups
Astrophysics and Space Science, 2003IR properties of Compact Group (CG) galaxies are presented and compared with IR properties of isolated galaxies. Despite CGs displaying more E-SOs and optically bright galaxies, no differences are retrieved concerning FIR emission. The observed lack of strong FIR enhancement in the CG sample is not surprising when interpreting FIR sources in CGs as ...
B. Kelm, P. Focardi, A. Zampieri
openaire +1 more source
Dwarf Galaxies in Nearby Galaxy Groups
2011The nearby Universe is populated mostly by galaxy groups, whose dominant galaxies are surrounded by dwarf galaxies. We have observed nearby galaxy groups in a distance range of 13–34 Mpc with a variety of different morphologies, densities, and richness in order to investigate their dwarf galaxy populations and to detect tidal streams in the halos of ...
Johannes Ludwig +3 more
openaire +1 more source
2008
The results of recent statistical analyses of extensive samples of galaxy groups are reviewed. Most of the groups appear to be unrelaxed systems which are far from virial equilibrium. With the introduction of a corresponding correction factor to standard virial mass estimates, the latest catalogues of groups point to M/L B ≈ 400 M⊙/L⊙ (H0 = 100kms−1 ...
openaire +1 more source
The results of recent statistical analyses of extensive samples of galaxy groups are reviewed. Most of the groups appear to be unrelaxed systems which are far from virial equilibrium. With the introduction of a corresponding correction factor to standard virial mass estimates, the latest catalogues of groups point to M/L B ≈ 400 M⊙/L⊙ (H0 = 100kms−1 ...
openaire +1 more source
1984
If galaxies in the universe were uniformly distributed we would have had to find another excuse to enjoy ourselves in Trieste. Fortunately groups of galaxies are a sufficiently messy subject to require at least one more meeting.
openaire +1 more source
If galaxies in the universe were uniformly distributed we would have had to find another excuse to enjoy ourselves in Trieste. Fortunately groups of galaxies are a sufficiently messy subject to require at least one more meeting.
openaire +1 more source
Populations In Local Group Galaxies
Annual Review of Astronomy and Astrophysics, 1989developed primarily by W. Baade in the 1950s, was inspired by the apparent dichotomy of galaxy content. Some galaxies (spirals and irregulars) seemed to be made up largely of bright, blue stars, with an admixture of interstellar material, whereas others (ellipticals) seemed to be made up exclusively offaint red stars (13). Baade called the two kinds of
openaire +1 more source
Simulation of Compact Groups of Galaxies
Astrophysics and Space Science, 1986Self-consistent simulations of seven groups of galaxies with halos have been performed to find a constraint upon the size of missing halos around spiral galaxies. An initial galaxy, which consists of 100 superstars, has half-mass radius 41 kpc and central velocity dispersion 235 km s−1. The simulations start from the epoch of maximum expansion.
openaire +1 more source
Active galaxies in groups of galaxies
Astrophysics, 1982G. M. Tovmasyan, �. Ts. Shakhbazyan
openaire +1 more source
Chemodynamical models of our Galaxy
Monthly Notices of the Royal Astronomical Society, 2023James Binney +2 more
exaly