Search Publications
The persistent cosmic web and its filamentary structure - II. Illustrations
Pichon, C.; Sousbie, T.; Kawahara, H.
The recently introduced discrete persistent structure extractor (DisPerSE, Sousbie, Paper I) is implemented on realistic 3D cosmological simulations and observed redshift catalogues; it is found that DisPerSE traces very well the observed filaments, walls and voids seen both in simulations and in observations. In either setting, filaments are show…
Gyrokinetic Simulations of Solar Wind Turbulence from Ion to Electron Scales
Quataert, E.; Howes, G. G.; Schekochihin, A. A. +4 more
A three-dimensional, nonlinear gyrokinetic simulation of plasma turbulence resolving scales from the ion to electron gyroradius with a realistic mass ratio is presented, where all damping is provided by resolved physical mechanisms. The resulting energy spectra are quantitatively consistent with a magnetic power spectrum scaling of k-2.8
Two-dimensional kinematics of SLACS lenses - III. Mass structure and dynamics of early-type lens galaxies beyond z ≃ 0.1
Treu, Tommaso; Czoske, Oliver; Koopmans, Léon V. E. +2 more
We combine in a self-consistent way the constraints from both gravitational lensing and stellar kinematics to perform a detailed investigation of the internal mass distribution, amount of dark matter, and dynamical structure of the 16 early-type lens galaxies from the SLACS Survey, at z = 0.08 - 0.33, for which both HST/ACS and NICMOS high-resolut…
The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data
Ferguson, H. C.; Dalcanton, J. J.; Bell, E. F. +15 more
We present an overview of the GHOSTS survey, the largest study to date of the resolved stellar populations in the outskirts of disk galaxies. The sample consists of 14 disk galaxies within 17 Mpc, whose outer disks and halos are imaged with the Hubble Space Telescope Advanced Camera for Surveys (ACS). In the first paper of this series, we describe…
Line Derived Infrared Extinction toward the Galactic Center
Lutz, D.; Genzel, R.; Gillessen, S. +7 more
We derive the extinction curve toward the Galactic center (GC) from 1 to 19 µm. We use hydrogen emission lines of the minispiral observed by ISO-SWS and SINFONI. The extinction-free flux reference is the 2 cm continuum emission observed by the Very Large Array. Toward the inner 14'' × 20'', we find an extinction of A 2.166 µm
Optical measurements of the Moon as a tool to study its surface
Korokhin, V.; Kaydash, V.; Videen, G. +3 more
This survey is a general overview of modern optical studies of the Moon and their diagnostic meaning. It includes three united parts: phase photometry, spectrophotometry, and polarimetry. The first one is devoted to the progress in the photometry of the Moon, which includes absolute albedo determination to refine the albedo scale (e.g., to connect…
Bursty bulk flows and dipolarization in MHD simulations of magnetotail reconnection
Nakamura, R.; Hesse, M.; Birn, J. +1 more
Using three-dimensional MHD simulations of magnetic reconnection in the magnetotail, we investigate the fate of earthward bursty bulk flows (BBFs). The flow bursts are identified as entropy-depleted magnetic flux tubes (“bubbles”) generated by the severance of a plasmoid via magnetic reconnection. The onset of fast reconnection coincides closely w…
The Majority of Compact Massive Galaxies at z ~ 2 are Disk Dominated
Bell, Eric F.; Koekemoer, Anton M.; van der Wel, Arjen +6 more
We investigate the stellar structure of massive, quiescent galaxies at z ~ 2, based on Hubble Space Telescope/WFC3 imaging from the Early Release Science program. Our sample of 14 galaxies has stellar masses of M * > 1010.8 M sun and photometric redshifts of 1.5 < z < 2.5. In agreement with previous work, …
Water in Star-forming Regions with the Herschel Space Observatory (WISH). I. Overview of Key Program and First Results
de Graauw, Th.; Liseau, R.; Braine, J. +69 more
Water In Star-forming regions with Herschel (WISH) is a key program on the Herschel Space Observatory designed to probe the physical and chemical structures of young stellar objects using water and related molecules and to follow the water abundance from collapsing clouds to planet-forming disks. About 80 sources are targeted, covering a wide rang…
Filaments and ridges in Vela C revealed by Herschel: from low-mass to high-mass star-forming sites
Bernard, J. -P.; Martin, P. G.; Hill, T. +29 more
We present the first Herschel PACS and SPIRE results of the Vela C molecular complex in the far-infrared and submillimetre regimes at 70, 160, 250, 350, and 500 µm, spanning the peak of emission of cold prestellar or protostellar cores. Column density and multi-resolution analysis (MRA) differentiates the Vela C complex into five distinct su…