Search Publications
Ultraviolet images of galaxies from the Optical Monitor on XMM-Newton
Kaastra, J. S.; Branduardi-Raymont, G.; Kahn, S. M. +3 more
A large number of galaxies, both normal and active, have been observed in ultraviolet light by the Optical Monitor on XMM-Newton. These are some of the deepest wide-field ultraviolet images of these galaxies yet obtained, and in many cases the first collected in this waveband. We present images of five active galaxies, and discuss the potential us…
Environmental predictions for the Beagle 2 lander, based on GCM climate simulations
Newman, C. E.; Lewis, S. R.; Read, P. L. +1 more
The Mars climate database (MCD) is a database of statistics based on output from physically consistent numerical model simulations which describe the climate and surface environment of Mars. It is used here to predict the meteorological environment of the Beagle 2 lander site. The database was constructed directly on the basis of output from multi…
Infrared Space Observatory Observations of the 53W002 Group at 6.7 Microns: In Search of the Oldest Stellar Populations at z = 2.4
Keel, William C.; Windhorst, Rogier A.; Eales, Stephen A. +5 more
We present a deep Infrared Space Observatory (ISO) observation at 6.7 µm of the 53W002 group of galaxies and active galactic nuclei (AGNs) at z=2.4. This approximately samples the emitted K band. Faint, blue star-forming objects are not detected, as expected from their very blue color across the emitted optical and UV spectrum. However, 53W0…
Abundancias químicas y estado de evolución de estrellas tipo B y A
Adelman, S. J.; Pintado, O.; Pedrosa, S.
Three stars of B (Alpha Tel and HR1781) and A (Tau7 Eri) type have been studied in order to determine their evolutionary state and the presence of chemical peculiarities. For this study we used spectra with high signal-to-noise ratios, obtained with the EBASIM spectrograph at CASLEO. The efective temperature, surface gravity, rotational velocity a…
XMM-Newton Observations of the Poor Cluster MKW 4
O'Sullivan, E.
We present a 15 ksec observation of the poor cluster MKW 4. While the cluster itself appears to be relaxed with little X-ray substructure, it is dominated by NGC 4073, a cD galaxy with a kinematically distinct core. We investigate the structure and properties of the cluster halo with particular reference to the temperature and abundance distributi…
Small Main-belt Asteroid Spectroscopic Survey, Phase II
Binzel, R. P.; Bus, S.
This data set contains visible-wavelength (0.435-0.925 micron) spectra for 1341 main-belt asteroids observed during the second phase of the Small Main-belt Asteroid Spectroscopic Survey (SMASSII) between August 1993 and March 1999. The purpose of the SMASSII survey was to provide a new basis for studying the compositional diversity and structure o…
Interplanetary Disturbances
Wimmer-Schweingruber, Robert F.
The Sun emits the variable solar wind which interacts with the very local interstellar medium to form the heliosphere. Hence variations in solar activity strongly influence interplanetary space, from the Suns surface out to the edge of the heliosphere. Superimposed on the solar wind are mass ejections from the Sun and/or its corona which disturb t…
Mid-Infrared properties of Early-type galaxies
Madden, S. C.; Vigroux, L.; Xilouris, E. M.
We have conducted a survey of early-type galaxies using the ISOCAMinstrument on board the Infrared Space Observatory (ISO)in order to probe their dustcontent. We present Mid-Infrared photometric properties for a sampleof 20 galaxies observed at 4.5, 7 and 15 µ$m. Using diagnosticcolor-color diagrams, we can delineate the different Mid-Infrar…
Multiple Flux Rope Events at the High-Latitude Magnetopause: Cluster/Rapid Observation on January 26, 2001
Reme, H.; Cao, Jin-Bin; Daly, P. +15 more
From 11:10 to 11:40UT on January 26, 2001 the four Cluster II spacecraft were located in the duskside high latitude regions of the magnetosheath and magnetosheath boundary layer (MSBL). During this time Interval the interplanetary magnetic field (IMF) had a negative Bz component. A detailed study on the multiple flux ropes (MFRs) observed in this …
La Cometa 67P Churyumov-Gerasimenko el il contributo degli astrofili italiani alla missione ROSETTA
Milani, Giannantonio
Comet 67P Churyumov-Gerasimenko, the new target of the ROSETTA spacecraft, was oberved during the 2002/2003 apparition, displacing an unusual tail. The tail was compatible with a neck-line structure and this implies a high nuclear activity far before perihelion. Images and data from the current and previous apparitions show that the comet reaches …