Search Publications
Galaxy Evolution Explorer Ultraviolet Spectroscopy and Deep Imaging of Luminous Infrared Galaxies in the European Large-Area ISO Survey S1 Field
Buat, Véronique; Burgarella, Denis; Heckman, Timothy M. +23 more
The European Large-Area ISO Survey (ELAIS) S1 field was observed by the Galaxy Evolution Explorer (GALEX) in both its Wide Spectroscopic and Deep Imaging Survey modes. This field was previously observed by the Infrared Space Observatory, and we made use of the catalog of multiwavelength data published by the ELAIS consortium to select galaxies com…
An XMM-Newton view of M101 - II. Global X-ray source properties
Warwick, R. S.; Roberts, T. P.; Ward, M. J. +2 more
We present the global X-ray properties of the point source population in the grand-design spiral galaxy M101, as seen with XMM-Newton. 108 X-ray sources are detected within the D25 ellipse of M101, of which ~24 are estimated to be background galaxies. Multiwavelength cross-correlations show that 20 sources are coincident with HII region…
Blue Stragglers in Low-Luminosity Star Clusters
Sandquist, Eric L.
We examine the blue straggler populations of 13 low-luminosity (MVt>~-6) globular clusters and two old open clusters. These clusters test blue straggler formation in environments intermediate between higher luminosity (and usually higher density) clusters and the Galactic field. The anticorrelation between the relative fre…
Expectations for Cassini observations of ring material with nearby moons
Lewis, Mark C.; Stewart, Glen R.
This paper describes N-body simulations of two regions of the saturnian ring system and examines what we might expect the Cassini orbiter to see in those areas. The first region is the edge of the Encke gap in the A ring that is perturbed by the satellite, Pan. Our previous simulations of this region neglected particle self-gravity [Lewis and Stew…
Simultaneous in-situ observations of the signatures of dayside reconnection at the high- and low-latitude magnetopause
Balogh, A.; Davies, J. A.; Wild, J. A. +10 more
We present magnetic field and particle data recorded by the Cluster and Geotail satellites in the vicinity of the high- and low-latitude dayside magnetopause, respectively, on 17 February 2003. A favourable conjunction of these spacecraft culminated in the observation of a series of flux transfer events (FTEs), characterised by bipolar perturbatio…
New insights in the FUV into the activity of the Herbig Ae star HD 163296
Deleuil, M.; Bouret, J. -C.; Roberge, A. +6 more
We present an analysis of the FUSE spectra of
XMM observations of the high-redshift quasar RXJ1028.6 - 0844 at z= 4.276: soft X-ray spectral flattening
Fabian, A. C.; Matsuoka, M.; Celotti, A. +2 more
We present results from a new XMM-Newton observation of the high-redshift quasar RXJ1028.6 - 0844 at a redshift of 4.276. The soft X-ray spectral flattening, as reported by a previous study with ASCA, is confirmed to be present, with, however, a reduced column density when modelled by absorption. The inferred column density for absorption intrinsi…
GaBoDS: the Garching-Bonn Deep Survey. III. Lyman-break galaxies in the Chandra Deep Field South
Simon, P.; Schrabback, T.; Bomans, D. J. +10 more
We present first results of our search for high-redshift galaxies in deep CCD mosaic images. As a pilot study for a larger survey, very deep images of the Chandra Deep Field South (CDFS), taken with WFI@MPG/ESO2.2m, are used to select large samples of 1070 U-band and 565 B-band dropouts with the Lyman-break method. The data of these Lyman-break ga…
Direct Evidence for an Early Reionization of the Universe?
Panagia, N.; Stern, D.; Dickinson, M. +5 more
We examine the possible reionization of the intergalactic medium by the source UDF 033238.7-274839.8 (hereafter HUDF-JD2), which was discovered in deep HST/VLT/Spitzer images obtained as part of the Great Observatories Origins Deep Survey and Hubble Ultra Deep Field projects. Mobasher et al. have identified HUDF-JD2 as a massive (~6×1011
Magnetic network dynamics: Activity level, feature size and anchoring depth
Meunier, N.
A large data set of MDI magnetograms is studied in order to analyze the global dynamics of magnetic structures from network to active regions. Two complementary techniques are used: feature tracking and correlation tracking. The very large data set allows the variation of their dynamics (angular rotation velocity and meridional circulation) to be …