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A Study of Flare-associated X-Ray Plasma Ejections. I. Association with Coronal Mass Ejections
Cho, K. -S.; Moon, Y. -J.; Park, Y. D. +2 more
We have made a comprehensive statistical study of the relationship between flare-associated X-ray plasma ejections and coronal mass ejections (CMEs). For this we considered all flare-mode data in Yohkoh SXT observations from 1999 April to 2001 March and then selected 279 limb flares seen at longitudes greater than 60°. For these events, we identif…
The enigmatic B[e]-star Henize 2-90: the non-spherical mass loss history from an analysis of forbidden lines
Borges Fernandes, M.; Kraus, M.; Lamers, H. J. G. L. M. +1 more
We study the optical spectrum of the exciting B[e] star
XMM-Newton Observations of Red AGNs
Wilkes, B. J.; Hines, D. C.; Smith, P. S. +5 more
XMM-Newton spectra of five red 2MASS active galactic nuclei (AGNs), selected from a sample observed by Chandra to be relatively X-ray bright and to cover a range of hardness ratios, confirm the presence of substantial absorbing material in three sources with optical classifications ranging from type 1 to type 2. A flat (hard) power-law continuum i…
Shock-cloud interaction in the Vela SNR observed with XMM-Newton
Miceli, M.; Bocchino, F.; Reale, F. +1 more
We analyzed an XMM-Newton EPIC observation of a bright knot, named FilD, in the northern rim of the Vela SNR, where the shock has encountered a cloud. The good combination of sensitivity, spectral, and spatial resolution allowed us to describe the internal structure of the observed ISM clouds and to obtain estimates of their temperature, density, …
From the Sun to the outer heliosphere: Modeling and analyses of the interplanetary propagation of the October/November (Halloween) 2003 solar events
Sun, Wei; Intriligator, Devrie S.; Dryer, Murray +3 more
We use the space weather validated 3-D HAFv2 model to help us study the interplanetary propagation of the October/November 2003 solar eruptions from the Sun to >90 AU and over a wide range of heliolongitudes and heliolatitudes. The HAFv2 model predictions at ACE (1 AU), Ulysses (5.23 AU), Cassini (8.67 AU), Voyager 2 (73 AU), and Voyager 1 (93 …
Maps of Titan's surface from 1 to 2.5 µm
Drossart, Pierre; Coustenis, Athena; Lai, Olivier +4 more
We have acquired resolved images of Titan with the adaptive optics systems PUEO/KIR at the CFHT (Hawaii) and NAOS/CONICA at the VLT (Chile). We report here on images and maps (when data at several orbital phases are available) of Titan's surface from observations taken during the last 4 years (2001-2004) in all the methane windows between 1 and 2.…
On the nature of the X-ray source in GK Persei
Schmitt, J. H. M. M.; Ness, J. -U.; Vrielmann, S.
We report XMM-Newton observations of the intermediate polar (IP) GK Per on the rise to the 2002 outburst and compare them to Chandra observations during quiescence. The asymmetric spin light curve implies an asymmetric shape of a semi-transparent accretion curtain and we propose a model for its shape. A low Fe xvii (λλ15.01/15.26 Å) line flux rati…
On the "injection problem" at the solar wind termination shock
Hilchenbach, M.; Kallenbach, R.; Bamert, K. +2 more
This article presents an integrated analytical model on the injection efficiencies of the different ion species of the Anomalous component of the Cosmic Rays (ACRs) at the solar wind termination shock. We find that the injection into diffusive (first-order Fermi) acceleration is dominated by parallel ion diffusion and not by perpendicular diffusio…
Extreme solar-terrestrial events of October 2003: High-latitude and Cluster observations of the large geomagnetic disturbances on 30 October
Buchert, S.; Amm, O.; Rosenqvist, L. +3 more
The extremely large solar eruption on 28 October 2003 caused an intense geomagnetic storm at Earth. A second solar eruption on 29 October resulted in a reintensification of the storm about a day later. Similarities and differences between these two events in terms of solar eruption, solar wind driver, and their resulting effect on the near-Earth e…
Emission-Line Spectroscopy of Damped Lyα Systems: The Case of SBS 1543+593/HS 1543+5921
Turnshek, David A.; Hopkins, Andrew M.; Miller, Christopher J. +4 more
We report HST/STIS spectroscopy and Gemini/GMOS-N imaging of the Damped Lyα (DLA) system toward HS 1543+5921 caused by the host star-forming galaxy (SFG) SBS 1543+593. The Gemini image shows new morphological details of this well-resolved DLA galaxy. In combination with previous optical spectra, the new UV spectra enable us to compare, for the fir…