9.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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131 papers · 1 filter
Modified spin-wave theory with ordering vector optimization I: frustrated bosons on the spatially anisotropic triangular lattice
Philipp Hauke, Tommaso Roscilde, Valentin Murg +2
We investigate a system of frustrated hardcore bosons, modeled by an XY antiferromagnet on the spatially anisotropic triangular lattice, using Takahashi's modified spin-wave (MSW)…
The SAURON project - XV. Modes of star formation in early-type galaxies and the evolution of the red sequence
K. L. Shapiro, J. Falcon-Barroso, G. van de Ven +15
We combine SAURON integral field data of a representative sample of local early-type, red sequence galaxies with Spitzer/IRAC imaging in order to investigate the presence of trace…
Protostellar collapse: radiative and magnetic feedbacks on small scale fragmentation
B. Commercon, P. Hennebelle, E. Audit +2
It is established that both radiative transfer and magnetic field have a strong impact on the collapse and the fragmentation of prestellar dense cores, but no consistent calculatio…
Plasma physics and planetary astrophysics
Gilles Chabrier
In this review, I briefly summarize the present status of experimental and theoretical investigations of the properties of matter under conditions characteristic of planetary inter…
Recurrent Novae: Progenitors of SN Ia?
Rolf Walder, Doris Folini, Jean M. Favre +1
We present 3D hydrodynamical simulations of the separated binary RS Ophiuchi (RS Oph), a recurrent nova and potential progenitor of a SN Ia. RS Oph is composed of a red giant (RG)…
Supersonically Turbulent, Shock Bound Interaction Zones
Doris Folini, Rolf Walder, Jean M. Favre
Shock bound interaction zones (SBIZs) are ubiquitous in astrophysics. We present numerical results for 2D and 3D, plane-parallel, infinitely extended SBIZs. Isothermal settings and…
Induction in a von Karman flow driven by ferromagnetic impellers
Gautier Verhille, Nicolas Plihon, Mickael Bourgoin +2
We study magnetohydrodynamics in a von Kármán flow driven by the rotation of impellers made of material with varying electrical conductivity and magnetic permeability. Gallium is t…
Steady state fluctuation relations for systems driven by an external random force
Juan Ruben Gomez-Solano, Ludovic Bellon, Artyom Petrosyan +1
We experimentally study the fluctuations of the work done by an external Gaussian random force on two different stochastic systems coupled to a thermal bath: a colloidal particle i…
Symmetric spaces of higher rank do not admit differentiable compactifications
Benoit Kloeckner
Any nonpositively curved symmetric space admits a topological compactification, namely the Hadamard compactification. For rank one spaces, this topological compactification can be…
Statistical mechanics of two-dimensional Euler flows and minimum enstrophy states
A. Naso, P. H. Chavanis, B. Dubrulle
A simplified thermodynamic approach of the incompressible 2D Euler equation is considered based on the conservation of energy, circulation and microscopic enstrophy. Statistical eq…
Relaxation equations for two-dimensional turbulent flows with a prior vorticity distribution
P. H. Chavanis, A. Naso, B. Dubrulle
Using a Maximum Entropy Production Principle (MEPP), we derive a new type of relaxation equations for two-dimensional turbulent flows in the case where a prior vorticity distributi…
The Multivariate Resultant is NP-hard in any Characteristic
Bruno Grenet, Pascal Koiran, Natacha Portier
The multivariate resultant is a fundamental tool of computational algebraic geometry. It can in particular be used to decide whether a system of n homogeneous equations in n variab…
VLTI/AMBER spectro-interferometric imaging of VX Sgr's inhomogenous outer atmosphere
A. Chiavassa, S. Lacour, F. Millour +8
Aims. We aim to explore the photosphere of the very cool late-type star VX Sgr and in particular the existence and characterization of molecular layers above the continuum forming…
Solar abundances and 3D model atmospheres
H. -G. Ludwig, E. Caffau, M. Steffen +3
We present solar photospheric abundances for 12 elements from optical and near-infrared spectroscopy. The abundance analysis was conducted employing 3D hydrodynamical (CO5BOLD) as…
The Fine Structure of SU(2) Intertwiners from U(N) Representations
Laurent Freidel, Etera R. Livine
In this work we study the Hilbert space space of N-valent SU(2) intertwiners with fixed total spin, which can be identified, at the classical level, with a space of convex polyhedr…
The Unifying Dark Fluid Model
Alexandre Arbey
The standard model of cosmology relies on the existence of two components, "dark matter" and "dark energy", which dominate the expansion of the Universe. There is no direct proof o…
Epsilon Indi Ba, Bb: a detailed study of the nearest known brown dwarfs
Robert R. King, Mark J. McCaughrean, Derek Homeier +3
The discovery of epsilon Indi Ba, Bb, a binary brown dwarf system very close to the Sun, makes possible a concerted campaign to characterise the physical parameters of two T dwarfs…
On the critical point of the Random Walk Pinning Model in dimension d=3
Q. Berger, F. Toninelli
We consider the Random Walk Pinning Model studied in [3,2]: this is a random walk X on Z^d, whose law is modified by the exponential of βtimes L_N(X,Y), the collision local time up…
The effect of finite container size on granular jet formation
Stefan von Kann, Sylvain Joubaud, Gabriel A. Caballero-Robledo +2
When an object is dropped into a bed of fine, loosely packed sand, a surprisingly energetic jet shoots out of the bed. In this work we study the effect that boundaries have on the…
Recurrence relations for spin foam vertices
Valentin Bonzom, Etera R. Livine, Simone Speziale
We study recurrence relations for various Wigner 3nj-symbols and the non-topological 10j-symbol. For the 6j-symbol and the 15j-symbols which correspond to basic amplitudes of 3d an…
Power-law distributions of particle concentration in free-surface flows
Jason Larkin, M. M. Bandi, Alain Pumir +1
Particles floating on the surface of a turbulent incompressible fluid accumulate along string-like structures, while leaving large regions of the flow domain empty. This is reflect…
The VIMOS VLT Deep Survey: the group catalogue
O. Cucciati, C. Marinoni, A. Iovino +39
[Abridged] We present a homogeneous and complete catalogue of optical groups identified in the purely flux limited (17.5<=I<=24.0) VIMOS-VLT Deep Survey (VVDS). We use mock catalog…
Weak KAM for commuting Hamiltonians
Maxime Zavidovique
For two commuting Tonelli Hamiltonians, we recover the commutation of the Lax-Oleinik semi-groups, a result of Barles and Tourin ([BT01]), using a direct geometrical method (Stoke'…
A characterization of relative Kazhdan Property T for semidirect products with abelian groups
Yves Cornulier, Romain Tessera
Let A be a locally compact abelian group, and H a locally compact group acting on A. Let G=HA be the semidirect product. We prove that the pair (G,A) has Kazhdan's Property T if an…