Search Publications
Variations of the 3-D coronal magnetic field associated with the X3.4-class solar flare event of AR 10930
Chen, P. F.; Yan, Yihua; Wang, Huaning +2 more
The variations of the 3-D coronal magnetic fields associated with the X3.4-class flare of active region 10930 are studied in this paper. The coronal magnetic field data are reconstructed from the photospheric vector magnetograms obtained by the Hinode satellite and using the nonlinear force-free field extrapolation method developed in our previous…
Three-dimensional Stereoscopic Analysis of a Coronal Mass Ejection and Comparison with UV Spectroscopic Data
Susino, Roberto; Bemporad, Alessandro; Dolei, Sergio
A three-dimensional (3D) reconstruction of the 2007 May 20 partial-halo coronal mass ejection (CME) has been made using STEREO/EUVI and STEREO/COR1 coronagraphic images. The trajectory and kinematics of the erupting filament have been derived from Extreme Ultraviolet Imager (EUVI) image pairs with the "tie-pointing" triangulation technique, while …
The Earliest Phases of Star formation (EPoS). Temperature, density, and kinematic structure of the star-forming core CB 17
Henning, Th.; Krause, O.; Beuther, H. +7 more
Context. The initial conditions for the gravitational collapse of molecular cloud cores and the subsequent birth of stars are still not well constrained. The characteristic cold temperatures (~10 K) in such regions require observations at sub-millimetre and longer wavelengths. The Herschel Space Observatory and complementary ground-based observati…
Modified Homogeneous Data Set of Coronal Intensities
Minarovjech, M.; Rybanský, M.; Dorotovič, I. +1 more
The Astronomical Institute of the Slovak Academy of Sciences has published the intensities, recalibrated with respect to a common intensity scale, of the 530.3 nm (Fe XIV) green coronal line observed at ground-based stations up to the year 2008. The name of this publication is Homogeneous Data Set (HDS). We have developed a method that allows one …
Herschel Extreme Lensing Line Observations: Dynamics of Two Strongly Lensed Star-forming Galaxies near Redshift z = 2
Carilli, Chris; Strauss, Michael A.; Frye, Brenda +11 more
We report on two regularly rotating galaxies at redshift z ≈ 2, using high-resolution spectra of the bright [C II] 158 µm emission line from the HIFI instrument on the Herschel Space Observatory. Both SDSS090122.37+181432.3 ("S0901") and SDSSJ120602.09+514229.5 ("the Clone") are strongly lensed and show the double-horned line profile that is…
What flare and CME parameters control the occurrence of solar proton events?
Moon, Y. -J.; Park, Jinhye
In this study we examine the occurrence probabilities of solar proton events (SPEs) and their peak fluxes depending on both flare and coronal mass ejection (CME) parameters: flare peak flux, longitude, impulsive time, CME linear speed, and angular width. For this we use the NOAA SPEs, their associated X-ray flares, and CME from 1997 to 2011. We di…
Laboratory spectroscopic detection of hydration in pristine lunar regolith
Izawa, Matthew R. M.; Cloutis, Edward A.; Applin, Daniel M. +3 more
Reflectance spectroscopy of Apollo lunar soil samples curated in an air- and water-free, sealed environment since recovery and return to Earth has been carried out under water-, oxygen-, CO2- and organic-controlled conditions. Spectra of these pristine samples contain features near 3 µm wavelength similar to those observed from th…
Temporal and spatial scales of a high-flux electron disturbance in the cusp region: Cluster observations
Dunlop, Malcolm; Fazakerley, Andrew; Torkar, Klaus +4 more
Using the Cluster multispacecraft observations, we analyze a long-duration field-aligned high-flux electron disturbance in the cusp region on 30 September 2001. All four Cluster spacecraft observed the same disturbance in which both the upward and downward electrons are observed and the electron flux was 1 order of magnitude higher than usual in t…
Diffuse X-Ray Emission from the Superbubbles N70 and N185 in the Large Magellanic Cloud
Velázquez, P. F.; Rosado, M.; Reyes-Iturbide, J. +3 more
We present a study of the diffuse X-ray emission from superbubbles (SBs) N70 (DEM L301) and N185 (DEM L25) located in the Large Magellanic Cloud, based on data from the XMM-Newton Satellite. We obtained spectra and images of these objects in the soft X-ray energy band. These X-ray spectra were fitted by a thermal plasma model, with temperatures of…
Efflorescence as a source of hydrated sulfate minerals in valley settings on Mars
Vaniman, David T.; Szynkiewicz, Anna; Borrok, David M.
A distinctive sulfur cycle dominates many geological processes on Mars and hydrated sulfate minerals are found in numerous topographic settings with widespread occurrences on the Martian surface. However, many of the key processes controlling the hydrological transport of sulfur, including sulfur sources, climate and the depositional history that …