Showing 2008Show all

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physics.plasm-ph2008★ 8 cited

Perpendicular electron collisions in drift and acoustic wave instabilities

J. Vranjes, S. Poedts

Perpendicular electron dynamics and the associated collisions are discussed in relation to the collisional drift wave instability. In addition, the limit of small parallel wave num…

nucl-ex2008★ 19 cited

Performance of silicon PIN photodiodes at low temperatures and in high magnetic fields

F. Wauters, I. S. Kraev, M. Tandecki +4

The performance of a Si PIN diode (type Hamamatsu S3590-06) as an energy sen- sitive detector operating at cryogenic temperatures (~10 K) and in magnetic fields up to 11 T was inve…

astro-ph2008★ 33 cited

Near-IR spectroscopic ages of massive star clusters in M82

A. Lançon, J. S. Gallagher, M. Mouhcine +3

Like other starburst galaxies, M82 hosts compact, massive young star clusters that are interesting both in their own right and as benchmarks for population synthesis models. Can sp…

cond-mat.dis-nn2008★ 5 cited

Distribution of averages in a correlated Gaussian medium as a tool for the estimation of the cluster distribution on size

S. V. Novikov, M. Van der Auweraer

Calculation of the distribution of the average value of a Gaussian random field in a finite domain is carried out for different cases. The results of the calculation demonstrate a…

astro-ph2008★ 15 cited

Discovery of non-radial pulsations in the spectroscopic binary Herbig Ae star RS Cha

T. Böhm, W. Zima, C. Catala +3

In this article we present a first discovery of non radial pulsations in both components of the Herbig Ae spectroscopic binary star RS Cha. The binary was monitored in quasi-contin…

math-ph2008

Painleve II asymptotics near the leading edge of the oscillatory zone for the Korteweg-de Vries equation in the small dispersion limit

T. Claeys, T. Grava

In the small dispersion limit, solutions to the Korteweg-de Vries equation develop an interval of fast oscillations after a certain time. We obtain a universal asymptotic expansion…

astro-ph2008★ 43 cited

A multiwavelength investigation of the massive eclipsing binary Cyg OB2 #5

N. Linder, G. Rauw, J. Manfroid +5

The properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. We have attempted…

cond-mat.dis-nn2008★ 129 cited

How to make a fragile network robust and vice versa

Andre A. Moreira, Jose S. Andrade, Hans J. Herrmann +1

We investigate topologically biased failure in scale-free networks with degree distribution . The probability that an edge remains intact is assumed to dep…

astro-ph2008★ 8 cited

The rotation and coma profiles of comet C/2004 Q2 (Machholz)

Maarten Reyniers, Pieter Degroote, Dennis Bodewits +2

Aims. Rotation periods of cometary nuclei are scarce, though important when studying the nature and origin of these objects. Our aim is to derive a rotation period for the nucleus…

hep-th2008★ 6 cited

Vector Supersymmetry: Casimir operators and contraction from OSp(3,2|2)

Roberto Casalbuoni, Federico Elmetti, Joaquim Gomis +3

We study some algebraic properties of the 'vector supersymmetry' (VSUSY) algebra, a graded extension of the four-dimensional Poincare' algebra with two odd generators, a vector and…

math.OA2008★ 19 cited

Poisson boundary of the discrete quantum group A_u(F)^

Stefaan Vaes, Nikolas Vander Vennet

We identify the Poisson boundary of the dual of the universal compact quantum group A_u(F) with a measurable field of ITPFI factors.

hep-th2008★ 66 cited

The Klebanov-Strassler model with massive dynamical flavors

Francesco Bigazzi, Aldo L. Cotrone, Angel Paredes +1

We present a fully backreacted D3-D7 supergravity solution dual to the Klebanov-Strassler cascading gauge theory coupled to a large number of massive dynamical flavors in the Venez…

math-ph2008★ 10 cited

Diffusive behavior from a quantum master equation

Jeremy Clark, Wojciech De Roeck, Christian Maes

We study a general class of translation invariant quantum Markov evolutions for a particle on . The evolution consists of free flow, interrupted by scattering events. We as…

physics.soc-ph2008★ 406 cited

Laplacian Dynamics and Multiscale Modular Structure in Networks

R. Lambiotte, J. -C. Delvenne, M. Barahona

Most methods proposed to uncover communities in complex networks rely on their structural properties. Here we introduce the stability of a network partition, a measure of its quali…

astro-ph2008★ 92 cited

Giants in the globular cluster omega Centauri: dust production, mass loss and distance

Iain McDonald, Jacco Th. van Loon, Leen Decin +5

We present spectral energy distribution modelling of 6875 stars in omega Centauri, obtaining stellar luminosities and temperatures by fitting literature photometry to state-of-the-…

cond-mat.soft2008★ 8 cited

A graph theoretical analysis of the energy landscape of model polymers

Marco Baiesi, Lorenzo Bongini, Lapo Casetti +1

In systems characterized by a rough potential energy landscape, local energetic minima and saddles define a network of metastable states whose topology strongly influences the dyna…

astro-ph2008★ 32 cited

On the behaviour of stellar winds that exceed the photon-tiring limit

Allard Jan van Marle, Stanley P. Owocki, Nir J. Shaviv

Stars can produce steady-state winds through radiative driving as long as the mechanical luminosity of the wind does not exceed the radiative luminosity at its base. This upper bou…

physics.flu-dyn2008★ 15 cited

Infrasound generation by tornadic supercell storms

M. Akhalkatsi, G. Gogoberidze

Acoustic wave generation by turbulence in the stratified, moist atmosphere is studied. It is shown that in the saturated moist air turbulence in addition to the Lighthill's quadrup…

math.CA2008★ 37 cited

Asymptotics for a special solution of the thirty fourth Painleve equation

A. R. Its, A. B. J. Kuijlaars, J. Ostensson

In a previous paper we studied the double scaling limit of unitary random matrix ensembles of the form Z_{n,N}^{-1} |\det M|^{2α} e^{-N \Tr V(M)} dM with α> -1/2. The factor |\det…

cond-mat.stat-mech2008★ 68 cited

DMRG-study of current and activity fluctuations near non-equilibrium phase transitions

Mieke Gorissen, Jef Hooyberghs, Carlo Vanderzande

Cumulants of a fluctuating current can be obtained from a free energy-like generating function which for Markov processes equals the largest eigenvalue of a generalized generator.…

physics.soc-ph2008★ 57 cited

Dynamics of latent voters

Renaud Lambiotte, Jari Saramaki, Vincent D. Blondel

We study the effect of latency on binary-choice opinion formation models. Latency is introduced into the models as an additional dynamic rule: after a voter changes its opinion, it…

astro-ph2008★ 27 cited

A parameter study of self-consistent disk models around Herbig AeBe stars

J. Meijer, C. Dominik, A. de Koter +3

We present a parameter study of self-consistent models of protoplanetary disks around Herbig AeBe stars. We use the code developed by Dullemond and Dominik, which solves the 2D rad…

cond-mat.supr-con2008★ 21 cited

Self organized mode locking effect in superconductor / ferromagnet hybrids

J. Van de Vondel, A. V. Silhanek, V. Metlushko +3

The vortex dynamics in a low temperature superconductor deposited on top of a rectangular array of micrometer size permalloy triangles is investigated experimentally. The rectangul…

cond-mat.stat-mech2008

Exact computation of current cumulants in small Markovian systems

Marco Baiesi, Christian Maes, Karel Netočný

We describe an algorithm computing the exact value of the mean current, its variance, and higher order cumulants for stochastic driven systems. The method uses a Rayleigh-Schroding…