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Do X-ray plasma ejections accelerate Coronal Mass Ejections?
Tomczak, M.
The X1.2 flare occurred on 23 April 1998 approximately 13° behind the eastern solar limb. Its C2.0 precursor is identified as a rapidly expanding system of magnetic loops that was well-observed by Yohkoh. Basic parameters of this ejection are estimated based on images from the SXT telescope. The evolution of the X-ray ejection is compar…
Inferring the coronal flaring patterns in active galactic nuclei from reverberation maps
Lasenby, A. N.; Goyder, R.
The relativistically broadened iron Kα line at 6.4 keV observed in the Seyfert 1 galaxy MCG-6-30-15 has provided a probe of the strong-gravity environment near a black hole, in particular suggesting that it is rapidly spinning. An important variable in such analyses is the geometry of the illuminating source. We present a new technique that constr…
Newly Identified Forbidden Transitions within the Ground Configuration of Ions of Very Low Abundance P, Cl, K, and Co
Curdt, W.; Landi, E.; Feldman, U.
Forbidden lines from transitions within the ground configuration of highly ionized atoms occupy an important role in diagnosing the properties of astrophysical plasmas. In this paper we report the identification of forbidden lines in the 500-1500 Å range from transitions within the ground configuration of highly ionized ions of the very low abunda…
Localization of wave fields in lower hybrid cavities
André, M.; Eriksson, A.; Tjulin, A.
Available from http://www.copernicus.org/site/EGU/annales/22/8/2951.htm?FrameEngine=false;
On coronal streamer changes
Howard, R. A.; Gopalswamy, N.; Shibasaki, K. +3 more
Coronal streamer represents one of the pre-eruption configurations of coronal mass ejections (CMEs), because they overlie prominences and often possess all the substructures of CMEs. In this paper, we report on a study of streamer changes associated with prominence eruptions. The prominence eruptions and streamer changes were observed by the Nobey…
Reconsidering the origin of the X-ray emission lines in GRB 011211
Ghisellini, G.; Tavecchio, F.; Lazzati, D.
We reanalyze the XMM-Newton data of GRB 011211 showing that the spectral features, interpreted by Reeves et al. (\cite{Ree02}, \cite{Ree03}) as due to thermal emission from a collisionally ionized plasma, can be also reproduced by a reflection model (with ionization parameter ξ∼ 102). We discuss the implications of this interpretation, …
Multi-Wavelength Observation Results of the C5.6 Limb Flare of 1 August 2003
Li, Hui; You, Jianqi; Du, Qiusheng +1 more
We obtained a complete set of Hα, Ca Π 8542 å and He I 10830 å spectra and slit-jaw Hα images of the C5.6 limb flare of 1 August 2003 using the Multi-channel Infrared Solar Spectrograph (MISS) at Purple Mountain Observatory. This flare was also observed by the Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) and partially by the Extre…
Solar Wind Electron Parameters from ULYSSES/URAP Quasi-Thermal Noise Measurements at Solar Maximum
Issautier, K.; Moncuquet, M.; Hoang, S.
We present the solar wind plasma parameters obtained from the Ulysses spacecraft during its second pole-to-pole fast latitude scan near the 2001 solar maximum. We study the solar wind properties from the electron density and core temperature measurements made by the radio receiver on Ulysses using the method of quasi-thermal noise spectroscopy. We…
Ion injections at auroral latitude during the March 31, 2001 magnetic storm observed by Cluster
Lundin, R.; Sauvaud, J. -A.; Fränz, M. +14 more
We present here simultaneous H+ and O+ ion dispersion signatures observed by three Cluster spacecraft above the northern auroral zone. These observations occur during strong geomagnetic activity (Kp = 9) and are consistent with a time-of-flight (TOF) dispersion of the ions. Using the TOF dispersion of H+…
The BM Ori System. I. Anomaly in the Radial Velocity
Klochkova, V. G.; Vitrichenko, E. A.
The radial velocities of the star BM Ori are determined from spectra obtained by the HST and IUE satellites, as well as from spectra obtained with the BTA telescope. An analysis of this data shows that the radial velocities of the main star and its satellite experience an irregular positive shift by ∼20-30 km/s. This fact can only be interpreted i…