CEA Paris-Saclay

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19912026

most citedAstropy: A Community Python Package for Astronomy

14.6k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2001Show all

195 papers · 1 filter

astro-ph2001★ 1.9k cited

Large-Scale Structure of the Universe and Cosmological Perturbation Theory

F. Bernardeau, S. Colombi, E. Gaztanaga +1

We review the formalism and applications of non-linear perturbation theory (PT) to understanding the large-scale structure of the Universe. We first discuss the dynamics of gravita…

nucl-ex2001★ 15 cited

Analysing powers for the reaction $n p \to p p π^{-}$ and for np elastic scattering from 270 to 570 MeV

M. Daum, M. Finger, M. Finger +10

The analysing power of the reaction $n p \to p p π^{-}$ for neutron energies between threshold and 570 MeV has been determined using a transversely polarised…

cond-mat.supr-con2001★ 4 cited

Giant vortices in the Ginzburg-Landau description of superconductivity

Vincent Hakim, Anaël Lemaître, Kirone Mallick

Recent experiments on mesoscopic samples and theoretical considerations lead us to analyze multiply charged ( $n > 1$ ) vortex solutions of the Ginzburg-Landau equations for arbitrary…

nlin.SI2001★ 25 cited

Integration of a generalized Hénon-Heiles Hamiltonian

C. Verhoeven, M. Musette, R. Conte

The generalized Hénon-Heiles Hamiltonian $H = 1/2 (P_{X}^{2} + P_{Y}^{2} + c_{1} X^{2} + c_{2} Y^{2}) + a X Y^{2} - b X^{3} /3$ with an additional nonpolynomial term $μ Y^{- 2}$ is known to be Liouville integrable for thr…

cond-mat.str-el2001★ 30 cited

Degeneracy of the ground-state of antiferromagnetic spin-1/2 Hamiltonians

G. Misguich, C. Lhuillier, M. Mambrini +1

In the first part of this paper, the extension of the Lieb-Schultz-Mattis theorem to dimensions larger than one is discussed. A counter example to the original formulation of Lieb-…

astro-ph2001★ 62 cited

A Closer Look at the Soft X-ray Transient X1608-52: Long-term Optical/X-ray Observations

S. Wachter, D. W. Hoard, C. D. Bailyn +2

We report long-term simultaneous optical and (RXTE) X-ray observations of the soft X-ray transient and low mass X-ray binary X1608-52 spanning from 1999 to 2001. In addition to the…

cond-mat.str-el2001★ 15 cited

Collective magnetic excitations in mixed-valence Sm0.83Y0.17S

P. A. Alekseev, J. -M. Mignot, A. Ochiai +6

The magnetic spectral response of black-phase mixed-valence Sm0.83Y0.17S has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in t…

hep-ph2001★ 6 cited

The Entropy of the Quark-Gluon Plasma

Jean-Paul Blaizot

The entropy of the quark-gluon plasma can be calculated from QCD using (approximately) self-consistent approximations. Lattice results for pure gauge theories are accurately reprod…

astro-ph2001★ 6 cited

Modelling Plerion Spectra and their Evolution

Yves A. Gallant, Eric van der Swaluw, John G. Kirk +1

We review recent theoretical developments on pulsar winds, their nebulae and relativistic shock acceleration, and show how they illuminate unsolved problems in plerion spectra, in…

astro-ph2001★ 1 cited

A 2.4-80 micron spectrophotometric study of SS433 with ISO

Yael Fuchs, Lydie Koch-Miramond, Peter Abraham

We present ISOPHOT spectrophotometric observations of SS433 at four different orbital phases in 1996 and 1997. The HeI+HeII lines in both spectra of SS433 and the Wolf-Rayet star W…

cond-mat.dis-nn2001★ 40 cited

Dynamical ultrametricity in the critical trap model

E. Bertin, J. -P. Bouchaud

We show that the trap model at its critical temperature presents dynamical ultrametricity in the sense of Cugliandolo and Kurchan [CuKu94]. We use the explicit analytic solution of…

astro-ph2001★ 24 cited

Near Infrared Observations of Galactic Black Hole Candidates

S. Chaty, I. F. Mirabel, P. Goldoni +4

We report on several European Southern Observatory (ESO) near-infrared (NIR) observational campaigns aimed at understanding the nature of galactic black hole candidates. Our result…

nlin.SI2001★ 11 cited

New contiguity relation of the sixth Painlevé equation from a truncation

Robert Conte, Micheline Musette

For the master Painlevé equation P6(u), we define a consistent method, adapted from the Weiss truncation for partial differential equations, which allows us to obtain the first deg…

nucl-th2001★ 10 cited

Considerations on rescattering effects for threshold photo- and electro-production of $π^{0}$ on deuteron

Michail P. Rekalo, Egle Tomasi-Gustafsson

We show that for the S-state $π^{0}$ -production in processes $γ + d \to d + π^{0}$ and $e^{-} + d \to e^{-} + d + π^{0}$ the rescattering effects due to the transition: $γ + d \to p + p + π^{-}$ (or $n+n+π^+)\t…

hep-th2001★ 56 cited

Chiral splitting and world-sheet gravitinos in higher-derivative string amplitudes

Kasper Peeters, Pierre Vanhove, Anders Westerberg

We report on progress made in the construction of higher-derivative superinvariants for type-II theories in ten dimensions. The string amplitude calculations required for this anal…

cond-mat.dis-nn2001★ 185 cited

Fluctuation-dissipation ratio of a spin glass in the aging regime

D. Herisson, M. Ocio

We present the first experimental determination of the time autocorrelation $C (t^{'}, t)$ of magnetization in the non-stationary regime of a spin glass. Quantitative comparison with th…

astro-ph2001★ 140 cited

Interacting Dark Matter disguised as Warm Dark Matter

Celine Boehm, Alain Riazuelo, Steen H. Hansen +1

We explore some of the consequences of Dark Matter-photon interactions on structure formation, focusing on the evolution of cosmological perturbations and performing both an analyt…

astro-ph2001★ 4 cited

Mass loss from galaxies: feeding the IGM, recycling in the IGM

Pierre-Alain Duc, Jonathan Braine, Ute Lisenfeld +2

As a result of internal processes or environmental effects like ram-pressure stripping or collisions, galaxies lose a significant part of their stellar and gaseous content. Whereas…

astro-ph2001★ 2 cited

SIGMA Observations of the Bursting Pulsar GRO J1744-28

J. Mejia, T. Villela, P. Goldoni +13

We present the results of the GRANAT/SIGMA hard X-/soft gamma-ray long-term monitoring of the Galactic Center (GC) region concerning the source GRO J1744-28, discovered on 1995 Dec…

astro-ph2001★ 26 cited

ISO investigates the nature of extremely-red hard X-ray sources responsible for the X-ray background

Alberto Franceschini, Dario Fadda, Catherine Cesarsky +3

We analyse very deep X-ray and mid-IR surveys in common areas of the Lockman Hole and the HDF North to study the sources of the X-ray background (XRB) and to test the standard obsc…

astro-ph2001★ 123 cited

The AGN contribution to mid-infrared surveys

Dario Fadda, Hector Flores, Guenther Hasinger +5

We provide constraints on the AGN contribution to the mid-IR extragalactic background light from a correlation analysis of deep X-ray and mid-IR observations in two regions centred…

astro-ph2001★ 2.1k cited

Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES

Romain Teyssier

A new N-body and hydrodynamical code, called RAMSES, is presented. It has been designed to study structure formation in the universe with high spatial resolution. The code is based…

hep-ex2001★ 8 cited

Search for R-parity Violating Supersymmetry in Dimuon and Four-Jets Channel

D0 collaboration, V. M. Abazov etal

We present results of a search for R-parity-violating decay of the neutralino chi_1^0, taken to be the Lightest Supersymmetric Particle. It is assumed that this decay proceeds thro…

hep-ex2001★ 12 cited

Search for Leptoquark Pairs Decaying to neutrino neutrino + jets in p anti-p Collisions at s**(1/2)=1.8 TeV

D0 Collaboration, V. M. Abazov

We present the results of a search for leptoquark (LQ) pairs in (85.2 +- 3.7) pb^{-1} of p anti-p collider data collected by the D0 experiment at the Fermilab Tevatron. We observe…