The Blackhole-Dark Matter Halo Connection [PDF]
, 2015 We explore the connection between the central supermassive blackholes (SMBH) in galaxies and the dark matter halo through the relation between the masses of the SMBHs and the maximum circular velocities of the host galaxies, as well as the relationship ...
Akl, Maya Abi +3 more
core +3 more sources
Phase-space shapes of clusters and rich groups of galaxies [PDF]
, 2013 Clusters and groups of galaxies are highly aspherical, with shapes approximated by nearly prolate ellipsoids of revolution. An equally fundamental property is the shape of these objects in velocity space which is the anisotropy of the global velocity ...
Wojtak, Radoslaw
core +1 more source
Velocity Dispersion, Size, Sérsic Index, and Dn4000: The Scaling of Stellar Mass with Dynamical Mass for Quiescent Galaxies [PDF]
, 2017 We examine the relation between stellar mass, velocity dispersion, size, Sérsic index, and for a volume-limited sample of ∼40,000 quiescent galaxies in the SDSS.
H. Zahid, M. Geller
semanticscholar +1 more source
Re-visiting the relations: Galactic thin disc age-velocity dispersion relation [PDF]
, 2007 The velocity dispersion of stars in the solar neighbourhood thin disc increases with time after star formation. Nordstrom et al. (2004) is the most recent observational attempt to constrain the age-velocity dispersion relation.
Alonso +73 more
core +2 more sources
Electron velocity distribution function in a plasma with temperature gradient and in the presence of suprathermal electrons: application to incoherent-scatter plasma lines [PDF]
Annales Geophysicae, 1998 The plasma dispersion function and the reduced velocity distribution function are calculated numerically for any arbitrary velocity distribution function with cylindrical symmetry along the magnetic field.
P. Guio +3 more
doaj +1 more source
Realizing normal group-velocity dispersion in free space via angular dispersion [PDF]
Optics Letters, 2021 It has long been thought that normal group-velocity dispersion (GVD) cannot be produced in free space via angular dispersion. Indeed, conventional diffractive or dispersive components such as gratings or prisms produce only anomalous GVD. We identify the conditions that must be fulfilled by the angular dispersion introduced into a plane-wave pulse to ...
Layton A. Hall, Ayman F. Abouraddy
openaire +3 more sources
Frontiers in Astronomy and Space Sciences, 2017 We present the galactic stellar age—velocity dispersion relation obtained from a semi-analytic model of galaxy formation. We divide galaxies into two populations: galaxies which have over-massive/under-massive black holes (BHs) against the best-fitting ...
Hikari Shirakata +3 more
doaj +1 more source
A HIGH STELLAR VELOCITY DISPERSION AND ∼100 GLOBULAR CLUSTERS FOR THE ULTRA-DIFFUSE GALAXY DRAGONFLY 44 [PDF]
, 2016 Recently a population of large, very low surface brightness, spheroidal galaxies was identified in the Coma cluster. The apparent survival of these ultra-diffuse galaxies (UDGs) in a rich cluster suggests that they have very high masses. Here, we present
P. V. Dokkum +8 more
semanticscholar +1 more source
Tight gas detection based on the reflectivity dispersion technology
Petroleum Exploration and Development, 2014 The study focuses on the reflectivity dispersion caused by velocity dispersion related to pore fluid and its application to identify tight gas reservoirs.
Zhifang YANG +3 more
doaj +1 more source
Meikuang Anquan, 2020 Dispersion curves of Rayleigh channel waves may have “cross” between the fundamental and first higher order modes either in the phase velocities or in group velocities in the low frequency band.
HE Daxi, ZHU Peimin, SHEN Suishui, CAI Wei, WANG Wengang
doaj +1 more source