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Hst/stis Observations of Rotation of T Tauri Jets
Ray, T. P.; Eislöffel, J.; Bacciotti, F. +2 more
We report on observations of jets from T Tauri stars with the STIS spectrograph on board of the Hubble Space Telescope (HST). Observations of this kind can resolve structures to within 10--20 AU from the source and thus open the best observational window to the initial generation of jets that is available today. In particular, we can search for in…
Occultations of Stars Brighter Than 15 mag by the Largest Trans-Neptunian Objects in 2004-2014
Denissenko, D. V.
We computed the occultations of stars brighter than 15 mag by the largest trans-Neptunian objects (TNOs) for the next ten years. In our search, we used the following catalogs: Hipparcos; Tycho2 with the coordinates of 2838666 stars taken from UCAC2 (Herald 2003); and UCAC2 (Zacharias et al. 2003) with 16356096 stars between 12.00 mag and 14.99 mag…
Premières observations de Saturne par Cassini
Vandaele, Ann C.
Short-Period Variables in ASAS Photometry
Molenda-Zakowicz, J.
We present results of our study of short--period variables in ASAS photometry. We focus on slowly pulsating B stars (SPBs), most of which were discovered by the Hipparcos satellite. We discuss the problem of aliasing in the ASAS photometry and its influence on the identification of frequencies of SPBs. Finally, we show that the ASAS photometry can…
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…