Search Publications
Temporal profiles of solar energetic particle events from SOHO/EPHIN data
Kunow, H.; Muller-Mellin, R.; Gómez-Herrero, R. +3 more
Temporal profiles of energetic ions and electrons observed at 1 AU during solar energetic particle events are mainly determined by particle injection features, the observer location relative to the source region at the Sun, and the interplanetary space plasma and field conditions during particle transport. In this work, temporal profiles of 18 sol…
Modelling Cosmic Ray Element Spectra and Ionization in the Ionospheres and Atmospheres of Terrestrial and Jovian Planets
Buchvarova, M.; Velinov, P. I. Y.; Kobylinski, Z.
The galactic (GCRs) and anomalous (ACRs) cosmic rays form the lower parts of the planetary ionospheres. For this purpose analytical and numerical spectra for cosmic particles are necessary. Our knowledge of GCR modulation in the solar system was greatly enhanced thanks to the heliospheric missions, Voyagers 1 and 2, Pioneer 10 and Ulysses. In this…
Near infrared imaging of the broad absorption line quasar BAL QSO 0134+3253
Eckart, A.; Zuther, J.
In this paper we present near infrared (NIR) imaging data of the host galaxy of the broad absorption line quasar (BALQ) at z=2.169, serendipitously found close to 3C 48 (Canalizo et al. 1998, AJ, 115, 890). The data were obtained with the ESO-VLT camera ISAAC during period 67. We find extended, rest-frame optical emission around the BALQ after sub…
IUE Spectra of Seyvert 1 Galaxy NGC 7469- BLR Characteristics of NGC 7469
Hyung, Siek; Son, Dong-Hoon
From the line ratios of Si III] 1892 to C III] 1909 (Feibelman & Aller 1987), we estimated the BLR electron densities and their changes of Seyfert 1 galaxy NGC 7469 using IUE spectra observed from June 11 to July 29, 1996 (Wanders et al. 1997). We separated blended Si III] and C III] lines using the STARLINK/DIPSO and measured their fluxes wit…
Fluctuations in the Intensity of Radiation Emerging from a Multicomponent Stochastic Atmosphere. II
Nikoghossian, A. G.; Aboudarham, J.; Mouradian, Z.
This part of a series of papers examines the more general problem in which it is assumed that the fluctuations in the intensity of radiation emerging from a medium are caused by random variations in both the optical thickness of the structural elements and the power of the energy sources contained in them. The frequency dependence of the relative …
Solar Energetic Particles from the October/November 2003 Events Observed by the Ulysses COSPIN Instruments Near 5 AU
Dalla, S.; Kunow, H.; Heber, B. +7 more
Compiled catalogue of the MK spectral classifications, including astrometric and photometric data and its application
Rybka, S. P.
The catalogue constructed as a tool for stellar kinematic analysis is described. It contains up-to-date information on spectral classifications in the MK system, positions and proper motions in the ICRS system, as well as BV magnitudes for 169,843 single stars. Astrometry and photometry were mainly selected from the Tycho-2. MK spectral types and …
Cluster/rapid energetic electron observations at the dayside magnetospheric boundary
Grande, M.; Carter, M.; Balogh, A. +9 more
We study the energetic electrons by the Cluster-II Rapid instrument on a dayside high-latitude pass on the night between March 21/22, 2001. The Cluster satellites were flying outward in the pre-noon sector, passing a cusp/cleft type region roughly at midnight. Contrary to earlier observations of high fluxes of energetic particles in the high-latit…
3D Plasma Structures Observed by the Four Cluster Spacecraft
Escoubet, C. P.; Goldstein, M.; Laakso, H.
In-Situ Heating in Active Region Loops
Wang, T.; Curdt, W.; Landi, E. +1 more
We report new observational results and insights in the energy release during transient events on sub-flare level in active region coronal loops. Our work is based on multi-temperature observations obtained high above the limb by the SUMER spectrometer on SOHO. We conclude that the energy is impulsively injected into the loop system from one and o…