Search Publications
Solar gravity modes: Present and future
Turck-Chièze, Sylvaine
Gravity modes are the best probes to study the solar radiative zone dynamics, especially in the nuclear core. These modes remain difficult to observe, but they are essential ingredients for progressing on the evolution of the Sun-Earth relationship at the level of centuries. Today, the knowledge of the internal dynamics comes from acoustic modes a…
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…
Comparison of CME characteristics for SEP and non-SEP related events
Reinard, A. A.; Andrews, M. A.
A comparison is made between flare-associated CMEs that produce SEPs and those that do not to determine what role CME velocity, flare duration, and CME-flare time delays play in SEP production. 62 SEP events were selected from a list compiled by NOAA. The non-SEP list was made up of CMEs chosen to mimic the SEP-related CMEs as closely as possible …
Probing plasma properties and dynamics inside the Sun
Kosovichev, Alexander G.
Helioseismology experiment MDI on board the SOHO spacecraft has provided tremendous amount of new information about the thermodynamic properties and dynamics of plasma in the Sun’s interior, uncovering remarkable new perspectives for studying complex interactions between turbulent convection, rotation and magnetism below the solar surface, and the…
Ceres: High-resolution imaging with HST and the determination of physical properties
Russell, C. T.; Stern, S. A.; Young, E. F. +4 more
Nine HST orbits have been used to image Ceres using the High Resolution Camera of the Advanced Camera for Surveys. Two hundred and fifty-nine images in three filters (F555W, F330W and F220W) were obtained covering the entire surface. Two visible features are readily apparent, a dark patch and a bright point. The bright spot was suitable for contro…
Detailed analysis of low-energy electron streaming in the near-Earth neutral line region during a substorm
Balogh, A.; Fazakerley, A. N.; Klecker, B. +11 more
A synaptic view of Cluster FGM, CIS, EDI, and PEACE observations of the near-Earth neutral line region during 1800 1830 UT on 13 September 2002 is discussed. Associated with the flow reversal and a thin cross-tail current sheet, a clear signature of a quadrupolar magnetic field is observed, which indicates the formation of the Hall current system …
Compact X-ray binaries in and out of core collapsed globulars
Grindlay, Jonathan E.
We review new Chandra and HST observations of the core collapsed cluster NGC 6397 as a guide to understanding the compact binary (CB) populations in core collapse globulars. New cataclysmic variables (CVs) and main sequence chromospherically active binaries (ABs) have been identified, enabling a larger sample for comparison of the Lx, F…
Philae (Rosetta Lander): Experiment status after commissioning
Rosenbauer, H.; Biele, J.; Bibring, J. P. +2 more
Being successfully launched on March 2, 2004, ESA's cornerstone mission "ROSETTA" (originally planned to be launched in January 2003 to comet Wirtanen) is en route. It will also bring the 100 kg Lander "Philae" with a scientific payload of 26.7 kg to the surface of comet 67P/Churyumov-Gerasimenko. After a first scientific sequence in 2014 it will …
INTEGRAL/IBIS search for e-e+ annihilation radiation from the galactic center region
Capitanio, F.; Ubertini, P.; Bazzano, A. +5 more
Electron positron annihilation radiation from the Galactic Center Region has been detected since the seventies, but its astrophysical origin is still a topic of a scientific debate. We have analyzed data of the gamma-ray imager IBIS/ISGRI onboard of ESA’s INTEGRAL platform in the e-e+ line. During the first year of the missio…