Results 41 to 50 of about 688,478 (251)
Intensity interferometry for observation of dark objects
, 2013 We analyze an intensity interferometry measurement carried out with two point-like detectors facing a distant source (e.g., a star) that may be partially occluded by an absorptive object (e.g., a planet).
Erkmen, Baris I. +2 more
core +1 more source
Dynamics of passing-stars-perturbed binary star systems [PDF]
, 2019 In this work, we investigate the dynamical effects of a sequence of close encounters over 200 Myr varying in the interval of 10000 -- 100000 au between a binary star system and passing stars with masses ranging from 0.1$M_{\odot}$ to 10$M_{\odot}$.
Bancelin, David +3 more
core +2 more sources
Frontiers in Astronomy and Space Sciences, 2019 This paper investigates the long-term evolution of spacecraft in Highly Elliptical Orbits (HEOs). The single averaged disturbing potential due to luni-solar perturbations, zonal harmonics of the Earth gravity field is written in mean Keplerian elements ...
C. Colombo
semanticscholar +1 more source
Chirikov and Nekhoroshev diffusion estimates: bridging the two sides of the river [PDF]
, 2013 We present theoretical and numerical results pointing towards a strong connection between the estimates for the diffusion rate along simple resonances in multidimensional nonlinear Hamiltonian systems that can be obtained using the heuristic theory of ...
Cincotta, Pablo M. +3 more
core +3 more sources
Deflagration to detonation transition by amplification of acoustic waves in type Ia supernovae
, 2013 We study a new mechanism for deflagration to detonation transition in thermonuclear supernovae (SNe Ia), based on the formation of shocks by amplification of sound waves in the steep density gradients of white dwarfs envelopes.
Charignon, Camille, Chièze, Jean-Pierre
core +1 more source
Scale transformations, tree-level perturbation theory and the cosmological matter bispectrum [PDF]
, 2007 Scale transformations have played an extremely successful role in studies of cosmological large-scale structure by relating the non-linear spectrum of cosmological density fluctuations to the linear primordial power at longer wavelengths.
Jun Pan +10 more
semanticscholar +1 more source
Nitrogen‐Vacancy Magnetometry of Edge Magnetism in WS2 Flakes
Advanced Functional Materials, EarlyView.Using nitrogen‐vacancy magnetometry, the authors visualize room‐temperature stray magnetic fields localized at the edges of WS2 flakes. Their measurements reveal edge‐specific magnetization consistent with spin canting in antiferromagnetically coupled edge states.
Ilja Fescenko +17 more
wiley +1 more source
Dynamics of dark energy in collapsing halo of dark matter [PDF]
, 2015 We investigate the non-linear evolution of spherical density and velocity perturbations of dark matter and dark energy in the expanding Universe. For that we have used the conservation and Einstein equations to describe the evolution of gravitationally ...
Novosyadlyj, B., Tsizh, M.
core +1 more source
Manipulating Ferroelectric Topological Polar Structures with Twisted Light
Advanced Materials, EarlyView.We demonstrate dynamic control of ferroelectric order in quasi‐2D CsBiNb2O7 using twisted ultraviolet light carrying orbital angular momentum. Our approach harnesses non‐resonant multiphoton absorption and induced strain to modulate topological of ferroelectric polarization textures.
Nimish P. Nazirkar +10 more
wiley +1 more source
, 2013 We report the discovery of a nearby M5.0V dwarf at 24.6 pc, SCR 1848-6855, that is orbited by an unusual companion causing an astrometric perturbation of more than 200 milli-arcseconds.
Gies, Douglas R. +6 more
core +1 more source