Results 31 to 40 of about 477,311 (280)

Are Compact High-Velocity Clouds Extragalactic Objects? [PDF]

, 2003
Compact high-velocity clouds (CHVCs) are the most distant of the HVCs in the Local Group model and would have HI volume densities of order 0.0003/cm^3. Clouds with these volume densities and the observed neutral hydrogen column densities will be largely ...
Braun R., Braun R., Mary E. Putman, Mebold U., Oort J. H., Philip R. Maloney, van der Kruit P. C., Wakker B. P.   +7 more
core   +2 more sources

The variability plane of accreting compact objects [PDF]

, 2007
Recently, it has been shown that soft-state black hole X-ray binaries and active galactic nuclei populate a plane in the space defined by the black hole mass, accretion rate and characteristic frequency.
Axelsson, Baptista, Barbuy, Barret, Belloni, Belloni, Belloni, Belloni, Beuermann, C. Knigge, Casares, Chapuis, Chaty, Cocchi, Cui, Dhawan, Di Salvo, E. G. Körding, Edelson, Esin, Falcke, Fender, Fender, Foellmi, Ford, Froning, Galloway, Galloway, Gierliński, Green, Greene, Hjellming, Homan, Homan, Hynes, Hynes, I. McHardy, Jonker, Jonker, Kaiser, Kalemci, Kitamoto, Knigge, Körding, Körding, Körding, Linares, Markowitz, Marsh, Massey, McClintock, McHardy, McHardy, Merloni, Migliari, Migliari, Molkov, Nowak, Orosz, Orosz, Pandel, Pottschmidt, Pratt, Psaltis, R. Fender, Ritter, S. Migliari, Shahbaz, Shaw, Sion, Sobczak, Suleimanov, T. Belloni, Thompson, Tomsick, Trudolyubov, Uttley, Uttley, Van Der Klis, Van Straaten, Vignarca, Warner, Warner, Wijnands, Wilms, Wood, Woudt, Zdziarski   +87 more
core   +3 more sources

COMPACT PARTITIONS ON LARGE DIMENSION TOPOLOGICAL GRAPHS

Известия Томского политехнического университета: Промышленная кибернетика, 2023
Relevance. Distributed systems containing hundreds and thousands of objects are usually built in the form of hierarchical structures. In these structures, lower-level objects are combined into subsets for connection to the corresponding centers.
Alexander V. Pogrebnoy, Andrey V. Pogrebnoy   +1 more
doaj   +1 more source

Bounds on the mass and abundance of dark compact objects and black holes in dwarf spheroidal galaxy halos [PDF]

, 2007
We establish new dynamical constraints on the mass and abundance of compact objects in the halo of dwarf spheroidal galaxies. In order to preserve kinematically cold the second peak of the Ursa Minor dwarf spheroidal (UMi dSph) against gravitational ...
F. J. Sánchez-Salcedo, Goodwin S. P., Hidalgo-Gamez A. M., Irwin M., Klessen R., Lake G., Sanchez-Salcedo F. J., V. Lora   +7 more
core   +3 more sources

Compact objects in conformal nonlinear electrodynamics

European Physical Journal C: Particles and Fields, 2019
In this paper we consider a special case of vacuum nonlinear electrodynamics with a stress–energy tensor conformal to the Maxwell theory. Distinctive features of this model are the absence of a dimensional parameter for the nonlinearity description and a
I. P. Denisova, B. D. Garmaev, V. A. Sokolov   +2 more
doaj   +1 more source

Fornax compact object survey FCOS: On the nature of Ultra Compact Dwarf galaxies

, 2004
The results of the Fornax Compact Object Survey (FCOS) are presented. The FCOS aims at investigating the nature of the Ultra Compact Dwarf galaxies (UCDs) recently discovered in the center of the Fornax cluster (Drinkwater et al. 2000).
Bekki, Bekki, Bertin, Dirsch, Djorgovski, Drinkwater, Drinkwater, Drinkwater, Drinkwater, Drinkwater, Faber, Fellhauer, Ferguson, Ferguson, Ferrarese, Gebhardt, Graham, Hilker, Hilker, Hilker, Karick, Kroupa, Kundu, Kundu, L. Infante, Lotz, M. Hilker, Maraston, Meylan, Meylan, Meylan, Meylan, Mieske, Parmentier, Platais, Quintana, S. Mieske, Stiavelli, Whitmore, Worthey   +39 more
core   +1 more source

Compact Massive Object in Galaxies

, 2016
arXiv admin note: substantial text overlap with arXiv:1603 ...
Tosta e Melo, Capuzzo Dolcetta
openaire   +4 more sources

Inspiraling compact objects with generic deformations

Physical Review D, 2022
Self-gravitating bodies can have an arbitrarily complex shape, which implies a much richer multipolar structure than that of a black hole in General Relativity. With this motivation, we study the corrections to the dynamics of a binary system due to generic, nonaxisymmetric mass quadrupole moments to leading post-Newtonian (PN) order.
Loutrel, Nicholas, Brito, Richard, Maselli, Andrea, Pani, Paolo   +3 more
openaire   +2 more sources

Ultra-relativistic journeys through compact astrophysical objects

Physics Letters B
It has recently been proved that, for constant density stars, there is a critical value Λ*=1 for the dimensionless density parameter Λ ≡ 4πR2ρmax of the star above which the asymptotically measured travel time Ts along a semi-circular trajectory that ...
Shahar Hod
doaj   +1 more source

On categorical notions of compact objects

Applied Categorical Structures, 1996
The concept of compactness has found various categorical generalizations. In this paper the author studies two such -- seemingly unrelated -- concepts: Borel-Lebesgue-compactness, based on the concept of a closure operator, an Áhn-Wiegandt-compactness, based on the bahaviour of certain morphisms with respect to projective limits.
openaire   +3 more sources