Results 181 to 190 of about 675,630 (383)

Satellite Galaxy Velocity Dispersions in the SDSS and Modified Gravity Models

Galaxies, 2014
The Sloan Digital Sky Survey (SDSS) provides data on several hundred thousand galaxies. The precise location of these galaxies in the sky, along with information about their luminosities and line-of-sight (Doppler) velocities, allows one to construct a ...
John W. Moffat, Viktor T. Toth
doaj   +1 more source

Comparing galaxy populations in compact and loose groups of galaxies

, 2012
We perform a comparison of the properties of galaxies in compact groups, loose groups and in the field to deepen our understanding of the physical mechanisms acting upon galaxy evolution in different environments. We select samples of galaxies in compact
Abadi, Abazajian, Adelman-McCarthy, Baldry, Balogh, Balogh, Beers, Bernardi, Bitsakis, Blanton, Blanton, Brasseur, Choloniewski, Coenda, Coenda, Colless, Cortese, Deng, Deng, Diaferio, Dressler, Díaz-Giménez, Eke, Gerke, Goto, Gunn, H. J. Martínez, H. Muriel, Hansen, Hickson, Hickson, Huchra, Iovino, Johnson, Kawata, Larson, Lee, Limber, Lynden-Bell, Maltby, Martínez, Martínez, Martínez, Martínez, Martínez, McConnachie, McConnachie, McGee, McGee, Mendel, Mendes de Oliveira, Merchán, Merchán, Moore, Moore, Nair, Oemler, Petrosian, Rasmussen, Sandage, Sandage, Sandage, Schechter, Schlegel, Schmidt, Shen, Springel, Strateva, Strauss, Taylor, Toomre, Torres-Flores, Tovmassian, Tzanavaris, V. Coenda, von der Linden, Walker, Weinmann, Weinmann, Wilman, Yang, York, Zandivarez   +82 more
core   +1 more source

Effect of Background Magnetic Field on Ion Weibel Instability With High‐Intensity Short‐Pulse Lasers

Contributions to Plasma Physics, EarlyView.
ABSTRACT The effect of finite background magnetic field on magnetic field amplification by Weibel instability using high‐intensity short‐pulse lasers is investigated. We consider Weibel instability for counter‐streaming sub‐relativistic plasma flows generated by shooting pure carbon targets with short‐pulse lasers.
Taiki Jikei, Takanobu Amano, Yosuke Matsumoto, Yasuhiro Kuramitsu   +3 more
wiley   +1 more source

A Comprehensive Analysis on the Nature of the Spiral Arms in NGC 3686, NGC 4321, and NGC 2403

Galaxies
In theoretical investigations, various mechanisms have been put forward to explain the emergence of spiral patterns in galaxies. One of the few ways to find out the nature of spirals in a particular galaxy is to consider the so-called corotation radius ...
Valeria Kostiuk, Alexander Marchuk, Alexander Gusev, Ilia V. Chugunov   +3 more
doaj   +1 more source

Distribution and Evolution of Metals in the Magneticum Simulations

Galaxies, 2017
Metals are ideal tracers of the baryonic cycle within halos. Their composition is a fossil record connecting the evolution of the various stellar components of galaxies to the interaction with the environment by in- and out-flows.
Klaus Dolag, Emilio Mevius, Rhea-Silvia Remus   +2 more
doaj   +1 more source

Polar-bulge galaxies

, 2015
Based on SDSS data, we have selected a sample of nine edge-on spiral galaxies with bulges whose major axes show a high inclination to the disk plane. Such objects are called polar-bulge galaxies.
Bizyaev, D. V., Mosenkov, A. V., Reshetnikov, V. P., Savchenko, S. S., Sotnikova, N. Ya.   +4 more
core   +1 more source

On the Formation of Galaxies in a Steady State Universe [PDF]

, 1955
D. W. Sciama
openalex   +1 more source

A review of multiscale numerical modeling of rock mechanics and rock engineering

Deep Underground Science and Engineering, EarlyView.
Multiscale numerical methods of rock mechanics and rock engineering are reviewed, and the review results show that more attention should be paid to the development of an advanced constitutive model in addition to numerical techniques themselves. Abstract Rock is geometrically and mechanically multiscale in nature, and the traditional phenomenological ...
Xindong Wei, Zhe Li, Gaofeng Zhao
wiley   +1 more source

Separating the Spectral Counterparts in NGC 1275/Perseus Cluster in X-Rays

Astronomy
We present a model-independent method for separating the spectral counterparts of the active galactic nucleus (AGN) NGC 1275 from the surrounding emission of the Perseus cluster, as observed by Suzaku/XIS cameras.
Elena Fedorova, Lidiia Zadorozhna, Anatolii Tugay, Nadiia Pulatova, Alexander Ganz, Olexandr Gugnin   +5 more
doaj   +1 more source

Are galaxies shy?

Astrophysics and Space Science, 2002
Until 1996, there was little evidence that most galaxies were ``shy'', i.e. that they would hide their stars behind a veil of dust and turn red when forming stars, radiating the bulk of their luminosity in the infrared (IR) at a given epoch of their history.
openaire   +3 more sources