Search Publications
3D Temperatures and Densities of the Solar Corona via Multi-Spacecraft EUV Tomography: Analysis of Prominence Cavities
Frazin, Richard A.; Kamalabadi, Farzad; Vásquez, Alberto M.
Three-dimensional (3D) tomographic analysis of extreme ultraviolet (EUV) images is used to place empirical constraints on the corona's temperature and density structure. The input data are images taken by the EUVI instrument on STEREO A and B spacecraft for Carrington Rotation 2069 (16 April to 13 May 2008). While the reconstructions are global, w…
Initiation of Coronal Mass Ejections in a Global Evolution Model
Yeates, A. R.; Mackay, D. H.
Loss of equilibrium of magnetic flux ropes is a leading candidate for the origin of solar coronal mass ejections (CMEs). The aim of this paper is to explore to what extent this mechanism can account for the initiation of CMEs in the global context. A simplified MHD model for the global coronal magnetic field evolution in response to flux emergence…
The Size-Star Formation Relation of Massive Galaxies at 1.5 < z < 2.5
Wuyts, S.; Förster Schreiber, N. M.; Toft, S. +4 more
We study the relation between size and star formation activity in a complete sample of 225 massive (M * > 5 × 1010 M sun) galaxies at 1.5 < z < 2.5, selected from the FIREWORKS UV-IR catalog of the CDFS. Based on stellar population synthesis model fits to the observed rest-frame UV-NIR spectral energy dist…
Mapping of water frost and ice at low latitudes on Mars
Bibring, J. -P.; Bellucci, G.; D'Aversa, E. +2 more
This paper reports on mapping of water frost and ice on Mars, in the range of latitudes between 30°S and 30°N. The study has been carried out by analysing 2485 orbits acquired during almost one martian year by the Mars Express/OMEGA imaging spectrometer. Water frost/ice is identified by the presence of ∼1.5 µm, ∼2 µm and ∼3.0 µm …
An ultra-compact dwarf around the Sombrero galaxy (M104): the nearest massive UCD
Spitler, Lee R.; Forbes, Duncan A.; Brodie, Jean P. +5 more
We report the discovery of an ultra-compact dwarf (UCD) associated with the Sombrero galaxy (M104). This is the closest massive UCD known and the first spectroscopically verified massive UCD which is located in a low-density environment.
The object, we name SUCD1, was identified in Hubble Space Telescope (HST)/Advanced Camera for Surveys (ACS…Periodicity in Saturn's magnetosphere: Plasma cam
Young, D. T.; Burch, J. L.; DeJong, A. D. +1 more
Plasma ion data from the Cassini Plasma Spectrometer (CAPS) are examined for all orbits from October 25, 2004 through Dec. 26, 2007. To eliminate effects of incomplete angular coverage, data are only used from the CAPS anode that is closest to viewing into the corotational flow and within 20° of that flow. The data are plotted in the SKR-based SLS…
Dynamical implications of seasonal and spatial variations in Titan's stratospheric composition
Nixon, Conor A.; Irwin, Patrick G. J.; Teanby, Nicholas A. +1 more
Successive Solar Flares and Coronal Mass Ejections on 2005 September 13 from NOAA AR 10808
Liu, Chang; Wang, Haimin; Deng, Na +3 more
We present a multiwavelength study of the 2005 September 13 eruption from NOAA AR 10808 that produced total four flares and two fast coronal mass ejections (CMEs) within ~1.5 hr. Our primary attention is paid to the fact that these eruptions occurred in close succession in time, and that all of them were located along an S-shaped magnetic polarity…
Coronal Mass Ejection Induced Outflows Observed with Hinode/EIS
Ding, M. D.; Chen, P. F.; Jin, M. +2 more
We investigate the outflows associated with two halo coronal mass ejections (CMEs) that occurred on 2006 December 13 and 14 in NOAA 10930, using the Hinode/EIS observations. Each CME was accompanied by an EIT wave and coronal dimmings. Dopplergrams in the dimming regions are obtained from the spectra of seven EIS lines. The results show that stron…
Structure of the Accretion Flow in Broad-Line Radio Galaxies: The Case of 3C 390.3
Tavecchio, F.; Reeves, J. N.; Braito, V. +8 more
We present XMM-Newton and Suzaku observations of the broad-line radio galaxy 3C 390.3 acquired in 2004 October and 2006 December, respectively. An archival Swift BAT spectrum from the 9 month survey is also analyzed, as well as an optical spectrum simultaneous to XMM-Newton. At soft X-rays, no absorption features are detected in the Reflection Gra…