Search Publications
Experimental study of nonlinear interaction of plasma flow with charged thin current sheets: 1. Boundary structure and motion
André, M.; Khotyaintsev, Y.; Rème, H. +13 more
We study plasma transport at a thin magnetopause (MP), described hereafter as a thin current sheet (TCS), observed by Cluster at the southern cusp on 13 February 2001 around 20:01 UT. The Cluster observations generally agree with the predictions of the Gas Dynamic Convection Field (GDCF) model in the magnetosheath (MSH) up to the MSH boundary laye…
A High-Resolution Spectral Atlas of α Persei from 3810 to 8100 Å
Galazutdinov, G. A.; Lee, Byeong-Cheol; Park, Myeong-Gu +5 more
We present a high-resolution (λ/δλ=90,000) spectral atlas of the F5 Ib star α Per covering the 3810-8100 Å region. The atlas, based on data obtained with the aid of the echelle spectrograph BOES fed by the 1.8 m telescope at Bohyunsan Observatory (Korea), is the result of the co-addition of a few well-exposed spectra. The final signal-to-noise rat…
Ultra-luminous sources in nearby galaxies
Mushotzky, Richard
This paper presents an update of what we have learned in the last year about the ULX phenomenon. New results are presented on radio emission from Holmberg II and a review is given on the recent X-ray data on timing and spectra. The new X-ray spectroscopic and optical imaging survey of nearby ULX with XMM allows us, for the first time, to place the…
Determination of the microbial diversity of spacecraft assembly, testing and launch facilities: First results of the ESA project MiDiv
Rettberg, P.; Fritze, D.; Verbarg, S. +4 more
In the near future, an increasing number of in situ life detection and sample return missions to planets and other solar system bodies will be launched. The demand to control spacecraft-carried microbial contamination becomes obvious. COSPAR (Committee of Space Research) has defined guidelines and bioburden limits for different types of missions a…
Line formation regions of the UV spectrum of C I Cygni
Friedjung, M.; Mikołajewska, J.; Quiroga, C.
Aims.They are the interpretation of the emission line formation regions in
Methods: .They involve the examination of radial velocities and fluxes of ultraviolet emission lines at different epochs, deduced from archival IUE and GRHS/HST spectra.
Results: .The line fluxes give electron densities and were in additi…
Faint U-Band Dropouts in the WFPC2 Parallels of the Hubble Ultra Deep Field
Casertano, Stefano; de Mello, Duilia; Wadadekar, Yogesh
We combine data from the extremely deep Hubble Space Telescope U (F300W) image, obtained using WFPC2 as part of the parallel observations of the Hubble Ultra Deep Field campaign, with BVi images from the Great Observatories Origins Deep Survey to identify a sample of Lyman break galaxies in the redshift range 2.0<~z<~3.5. We use recent stell…
Evidence of standing waves during a Pi2 pulsation event observed on Cluster
Blomberg, L. G.; Collier, A. B.; Hughes, A. R. W. +1 more
Observations of Pi2 pulsations at middle and low latitudes have been explained in terms of cavity mode resonances, whereas transients associated with field-aligned currents appear to be responsible for the high latitude Pi2 signature. Data from Cluster are used to study a Pi2 event observed at 18:09 UTC on 21 January 2003, when three of the satell…
Spitzer observations of red galaxies: Implication for high-redshift star formation
Papovich, Casey
My colleagues and I identified distant red galaxies (DRGs) with J - Ks > 2.3 in the southern Great Observatories Origins Deep Surveys (GOODS-S) field. These galaxies reside at z ∼ 1-3.5, (< z> ≃ 2.2) and based on their ACS (0.4-1 µm), ISAAC (1-2.2 µm), and IRAC (3-8 µm) photometry, they typically have stellar …
Simulation of the Cluster-Spacecraft Floating Probe Potential
Escoubet, C. P.; Masson, A.; Laakso, H. +2 more
Saturn's Icy Moon Rhea: A Prediction for its Bulk Chemical Composition and Physical Structure at the Time of the Cassini Spacecraft First Flyby
Prentice, Andrew J. R.
I report a model for the formation of Saturn's family of mid-sized icy moons to coincide with the first flypast of Rhea by the Cassini spacecraft on 2005 November 26. It is proposed that the moons had condensed from a concentric family of orbiting gas rings that were shed some 4.6 × 109 yr ago by the proto-Saturnian (hereafter p-Sat) cl…