Results 61 to 70 of about 407,723 (180)

The Globular Cluster System of the Virgo Giant Elliptical Galaxy NGC 4636: II. Kinematics of the Globular Cluster System

, 2009
We present a kinematic analysis of the globular cluster(GC) system in the giant elliptical galaxy (gE) NGC 4636 in the Virgo cluster. Using the photometric and spectroscopic database of 238 GCs, we have investigated the kinematics of the GC system.
Arimoto, Baldi, Bender, Binney, Brighenti, Chakrabarty, Cohen, Côté, Côté, Côté, de Vaucouleurs, Dehnen, Harris, Harris, Ho Seong Hwang, Hong Soo Park, Hwang, Johnson, Kim, Kissler, Kissler-Patig, Kissler-Patig, Kissler-Patig, Kormendy, Kravtsov, Larson, Lee, Lee, Lee, Lee, Lee, Loewenstein, Masato Onodera, Matsushita, McLaughlin, Minniti, Myung Gyoon Lee, Naoyuki Tamura, Navarro, Nobuo Arimoto, O'Sullivan, Park, Peng, Peng, Peng, Rhode, Richtler, Romanowsky, Romanowsky, Saglia, Sandage, Temi, Tonry, Toomre, Vesperini, Wilkinson, Woodley, Zepf   +57 more
core   +1 more source

A Complete Spectroscopic Survey of the Milky Way satellite Segue 1: Dark matter content, stellar membership and binary properties from a Bayesian analysis

, 2011
We introduce a comprehensive analysis of multi-epoch stellar line-of-sight velocities to determine the intrinsic velocity dispersion of the ultrafaint satellites of the Milky Way.
Belokurov, Bolton, Brandner, Duquennoy, Geha, Goldberg, Gregory D. Martinez, Hargreaves, James Bullock, Joshua D. Simon, Kleyna, Kuzio de Naray, Manoj Kaplinghat, Marla Geha, Martin, Martinez, Mayor, Minor, Odenkirchen, Peñarrubia, Quinn E. Minor, Raghavan, Scott, Simon, Simon, Skilling, Tollerud, Walker, Walker, Walker, Willman, Willman, Wolf, Zucker   +33 more
core   +1 more source

Using globular clusters to test gravity in the weak acceleration regime: NGC 7099 [PDF]

, 2006
A test of Newton's law of gravity in the low acceleration regime using globular clusters is presented. New results for the core collapsed globular cluster NGC 7099 are given.
Carraro, Giovanni, Gilmozzi, Roberto, Marconi, Gianni, Scarpa, Riccardo   +3 more
core   +2 more sources

Canceling and inverting normal and anomalous group-velocity dispersion using space-time wave packets [PDF]

, 2022
Layton A. Hall, Ayman F. Abouraddy
openalex   +1 more source

Determination and impact factor analysis of hydrodynamic dispersion coefficient within a gravel layer using an electrolyte tracer method

International Soil and Water Conservation Research, 2016
Hydrodynamic dispersion is a measure for describing the process of solute transport in porous media. Characterizing the dispersion of water flow within gravel is essential for the prediction of solute transport especially nonpoint source pollutants ...
Xiaonan Shi, Tingwu Lei, Yan Yan, Fan Zhang   +3 more
doaj   +1 more source

Virial mass in DGP brane cosmology

, 2009
We study the virial mass discrepancy in the context of a DPG brane-world scenario and show that such a framework can offer viable explanations to account for the mass discrepancy problem.
Bohmer C G, Carlberg R G, H R Sepangi, Heydari-Fard M, Jackson J C, Mannheim P D, Milgrom M, Mohammedi N, Reiprich T H, S Shahidi   +9 more
core   +1 more source

Velocity dispersion estimates of APM galaxy clusters [PDF]

, 1999
We present 83 new galaxy radial velocities in the field of 18 APM clusters with redshifts between 0.06 and 0.13. The clusters have Abell identifications and the galaxies were selected within 0.75 h$^{-1}$Mpc in projection from their centers.
Alonso, M. Victoria, Lambas, Diego G., Muriel, Hernan, Valotto, Carlos   +3 more
core   +2 more sources

Velocity dispersions in statistical lensing

The Astrophysical Journal, 1993
The theoretical average line-of-sight velocity dispersion along the radius of a spherical galaxy or cluster of galaxies tends to a variable value. Statistical lensing studies often take into account only the asymptotic value, either close to the center or at large distances, rather than the full variation: this results in significant effects in lensing
openaire   +1 more source

Gaussian Process Methods for Very Large Astrometric Data Sets

The Astrophysical Journal
We present a novel nonparametric method for inferring smooth models of the mean velocity field and velocity dispersion tensor of the Milky Way from astrometric data.
Timothy Hapitas, Lawrence M. Widrow, Thavisha E. Dharmawardena, Daniel Foreman-Mackey   +3 more
doaj   +1 more source

Velocity dispersion of correlated energy spread electron beams in the free electron laser

New Journal of Physics, 2017
The effects of a correlated linear energy/velocity chirp in the electron beam in the free electron laser (FEL), and how to compensate for its effects by using an appropriate taper (or reverse-taper) of the undulator magnetic field, is well known.
L T Campbell, A R Maier
doaj   +1 more source