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Saturn's cloud morphology and zonal winds before the Cassini encounter
Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +2 more
Analyses of Hubble Space Telescope (HST) images of Saturn obtained from August 2003 to March 2004, with extensive support from ground-based telescopes, have been used to characterize the cloud morphology and motions in its atmosphere few months before the Cassini encounter. We present data on the major meteorological features as potential targets …
Cluster observations of surface waves on the dawn flank magnetopause
Dunlop, M.; Bosqued, J.; Fazakerley, A. +3 more
Available from http://www.copernicus.org/site/EGU/annales/22/3/971.htm?FrameEngine=false;
Beyond the iron group: Heavy metals in hot subdwarfs
O'Toole, S. J.
We report the discovery of strong photospheric resonance lines of Ga III, Ge IV, Sn IV and Pb IV in the UV spectra of more than two dozen sdB and sdOB stars at temperatures ranging from 22 000 K to 40 000 K. Lines of other heavy elements are also detected, however in these cases more atomic data are needed. Based on these discoveries, we present a…
Coronal Loop Oscillations and Flare Shock Waves
Hudson, H. S.; Warmuth, A.
A statistical analysis of coronal loop oscillations observed by the Transition Region and Coronal Explorer (TRACE) shows that 12 of 28 cases were associated with metric type II bursts. The timing is consistent with the idea that in many cases the loop oscillations result from the passage of a large-scale wave disturbance originating in a flare in …
Chromospheric Waves Observed in the He I Spectral Line (λ = 10830 Å): A Closer Look
Gilbert, Holly R.; Holzer, Thomas E.
Although ``Moreton'' waves have historically been observed in Hα data, more recently waves have also been observed in chromospheric He I (λ=10830 Å) images. In a previous study, we found that chromospheric waves observed in He I data (from the Mauna Loa Solar Observatory) in two events (occurring on 2000 November 25 and 2001 January 20) are cospat…
The X-ray luminosity function of galaxies in the Coma cluster
Finoguenov, A.; Boselli, A.; Gavazzi, G. +3 more
The XMM-Newton survey of the Coma cluster of galaxies covers an area of 1.86 square degrees with a mosaic of 16 pointings and has a total useful integration time of 400 ks. Detected X-ray sources with extent less than 10'' were correlated with cataloged galaxies in the Coma cluster region. The redshift information, which is abundant in …
The Nature of Luminous X-Ray Sources with Mid-Infrared Counterparts
Le Floc'h, E.; Barmby, P.; Dole, H. +28 more
We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24 µm using the Multiband Imaging Photometer (MIPS) and also with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We assemble optical/infrared spectral energy distributions (SEDs) for 45 X-ray/24 µm s…
The Absorption Signatures of Dwarf Galaxies: The z=1.04 Multicloud Weak Mg II Absorber toward PG 1634+706
Charlton, Jane C.; Churchill, Christopher W.; Zonak, Stephanie G. +1 more
We analyze high-resolution spectra of a multicloud weak [defined as Wr(MgII)<0.3 Å] absorbing system along the line of sight to PG 1634+706. This system gives rise to a partial Lyman limit break and absorption in Mg II, Si II, C II, Si III, Si IV, C IV, and O VI. The lower ionization transitions arise in two kinematic subsystems with…
The jovian rings: new results derived from Cassini, Galileo, Voyager, and Earth-based observations
Nicholson, P. D.; Burns, J. A.; Showalter, M. R. +3 more
Cassini's Imaging Science Subsystem (ISS) instrument took nearly 1200 images of the Jupiter ring system during the spacecraft's 6-month encounter with Jupiter (Porco et al., 2003, Science 299, 1541-1547). These observations constitute the most complete data set of the ring taken by a single instrument, both in phase angle (0.5°-120° at seven angle…
Optical and near infrared observations of SN 1998bu
Sollerman, J.; Spyromilio, J.; Fransson, C. +3 more
Infrared and optical spectra of SN 1998bu at an age of one year after explosion are presented. The data show evidence for the radioactive decay of 56Co to 56Fe, long assumed to be the powering source for the supernova light curve past maximum light. The spectra provide direct evidence for at least 0.4 solar masses of iron bei…