Navegação Ciências Exatas e da Terra por Título
Resultados 804-823 de 5972
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Cold-fluid equilibrium for a corkscrewing elliptic beam in a variably focusing channel
(2000) [Artigo de periódico]It is shown that there exists a new class of cold-fluid corkscrewing elliptic beam equilibria for ultrahigh-brightness, space-charge-dominated beam propagation through a linear focusing channel consisting of uniform ... -
Cold molecular gas outflow encasing the ionized one in the Seyfert galaxy NGC 3281
(2023) [Artigo de periódico]We present ALMA CO (2-1) observations of the Seyfert 2 galaxy NGC 3281 at ∼100 pc spatial resolution. This galaxy was previously known to present a bi-conical ionized gas outflow extending to 2 kpc from the nucleus. The ... -
Colisão com o 'efeito estilingue'
(2010) [Artigo de periódico]Abordamos teoricamente a colisão com o 'efeito estilingue' onde um corpo transfere momento linear e energia cinética para um segundo corpo de massa menor, fazendo com que a energia mecânica desse segundo corpo cresça de ... -
Collective effects on the operation of free-eletron lasers with an axial guide field
(1982) [Artigo de periódico]The collective interaction in a free-electroii laser with combined helical wiggler and uniform axial guide fields is presented in the linearized regime. The analysis involves a perturbation of the Vlasov-Maxwell equations ... -
Collisional damping rates for plasma waves
(2016) [Artigo de periódico]The distinction between the plasma dynamics dominated by collisional transport versus collective processes has never been rigorously addressed until recently. A recent paper [P. H. Yoon et al., Phys. Rev. E 93, 033203 ... -
Collisional effects, ion-acoustic waves, and neutrino oscillations
(2017) [Artigo de periódico]We analyze the role of collisional effects on the coupling between ion-acoustic waves and neutrino flavor oscillations, discussing its relevance for plasma instabilities in extreme plasma environments like in type II ... -
Collisionless relaxation in gravitacional systems from violent relaxation to gravothermal collapse
(2008) [Artigo de periódico]Theory and simulations are used to study collisionless relaxation of a gravitational N-body system. It is shown that when the initial one-particle distribution function satisfies the virial condition—potential energy is ... -
Collisionless relaxation in non-neutral plasmas
(2008) [Artigo de periódico]A theoretical framework is presented which allows us to quantitatively predict the final stationary state achieved by a non-neutral plasma during a process of collisionless relaxation. As a specific application, the theory ... -
Colloidal charge renormalization in suspensions containing multivalent electrolyte
(2010) [Artigo de periódico]A theory is proposed which allows us to self-consistently calculate the effective colloidal charge and the counterion and coion density profiles in suspensions containing both multivalent and monovalent electrolytes. The ... -
Colloidal charge reversal : dependence on the ionic size and the electrolyte concentration
(2008) [Artigo de periódico]Extensive Monte Carlo simulations and scaling arguments are used to study the colloidal charge reversal. The critical colloidal surface charge density σc at which the reversal first appears is found to depend strongly on ... -
Colloidal dispersion stability : kinetic modeling of agglomeration and aggregation
(2015) [Artigo de periódico]In this work we present a simple model for the kinetics of agglomeration and aggregation of colloidal particles. We consider that particles agglomerate rapidly and endothermically forming oligomers. These oligomers can, ... -
Color dipole predictions for the exclusive vector meson photoproduction in pp, pPb, and PbPb collisions at run 2 LHC energies
(2017) [Artigo de periódico]In this paper we present a comprehensive analysis of exclusive vector-meson photoproduction in pp, pPb and PbPb collisions at Run 2 LHC energies using the color dipole formalism. The rapidity distributions and total cross ... -
Color evaporation and elastic [ípsilon] photoproduction at DESY HERA
(2002) [Artigo de periódico]The diffractive photoproduction of vector mesons is usually described by considering the two-gluon (Pomeron) exchange, the nondiagonal parton distributions, and the contribution of the real part to the cross section. In ... -
Colour evolution models and the distribution of lmc clusters in the integrated ubv plane
(1993) [Artigo de periódico]We present a comparison between photometric cluster models, based on classical and with-overshooting stellar tracks, and the enlarged sample of 624 LMC clusters recently gathered in integrated UBV photometry by Bica et al. ... -
Colour-magnitude analysis of five old open clusters
(2005) [Artigo de periódico]The Galileo Telescope was used to carry out BV photometry of five faint open clusters, for which no Colour Magnitude Diagrams were available in the literature. The clusters Berkeley 24, Berkeley 35, Berkeley 78, PWM 1, and ... -
Colour-magnitude diagrams of the inner halo globular clusters NGC 5986 and NGC 6712
(2000) [Artigo de periódico]We present V and I photometry for NGC 5986 and B and V for NGC 6712. NGC 5986 has a blue extended horizontal branch, while NGC 6712 has a composite red and blue horizontal branch, where the latter extends to unusual bluer ... -
Colour magnitude diagrams of the moderately metal-rich globular clusters NGC 6569 and Palomar 11
(2001) [Artigo de periódico]For the first time Colour-Magnitude Diagrams are presented for NGC 6569 and Palomar 11. NGC 6569 is a rather concentrated cluster whereas Palomar 11 is loose and sparsely populated. Cluster parameters are derived from V ... -
Combination of CMS searches for heavy resonances decaying to pairs of bosons or leptons
(2019) [Artigo de periódico]A statistical combination of searches for heavy resonances decaying to pairs of bosons or leptons is presented. The data correspond to an integrated luminosity of 35.9 fb−1 collected during 2016 by the CMS experiment at ... -
Combination of inclusive and differential tt¯ charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8TeV
(2018) [Artigo de periódico]Abstract: This paper presents combinations of inclusive and di erential measurements of the charge asymmetry (AC) in top quark pair (t t) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data ... -
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV
(2023) [Artigo de periódico]A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections ...
