Search Publications
Missions
Journals
Publication Years
Fast solar wind after the rapid acceleration
Breen, A. R.; Tokumaru, M.; Hayashi, K. +3 more
We have studied the radial dependence of the velocity of high-latitude fast solar wind in the heliocentric distance range of 0.13-0.9 AU. For this study a new tomographic analysis method which can evaluate uncertainties was developed to obtain velocity distribution maps on two reference spheres at 0.13 and 0.3 AU using interplanetary scintillation…
Cluster observations of velocity space-restricted ion distributions near the plasma sheet
Lundin, R.; Sauvaud, J. -A.; Dandouras, I. +15 more
We present Cluster ion observations obtained at 18 RE in the magnetotail on 1 October 2001. According to a recent analysis, the quartet encountered a reconnection region and a tailward-moving neutral line. We examine in detail selected 3-D ion distributions, which through much of the hour following 0925 UT were non-gyrotropic. B-perpend…
XMM-Newton observations of two X-ray-bright galaxy groups - pushing out to r500
Ponman, T. J.; Rasmussen, J.
We report on the results of XMM-Newton observations of the z= 0.18 galaxy group WARPJ0943.7+1644 and the nearby poor cluster WARPJ0943.5+1640 at z= 0.256. Tracing the X-ray gas out to ~425 and ~500 h-1 kpc in the two systems, corresponding to roughly 70 per cent of the estimated virial radii, we find the surface-brightness profile of bo…
Prominence atlas in the SUMER range 800 1250 Å: I. Observations, data reduction and preliminary results
Vial, J. -C.; Parenti, S.; Lemaire, P.
The aim of this work is to build an EUV-UV spectral catalogue of a prominence. Here we focus on the preparatory work for the final result and we give an example of the results obtained. As a first step, we present the information needed for a full understanding of the results that will form the final entire catalogue. The data are composed of a fu…
The microscope for Beagle 2
Keller, H. U.; Hviid, S. F.; Thomas, N. +13 more
The microscope for the Beagle 2 lander, which was launched as part of the European Space Agency's Mars Express mission on 2 June 2003, will provide images of the Martian surface at around 6 µm resolution. It will provide optical images of the surface of Mars at a resolution 5 times higher than any other experiment currently planned. The devi…
Transient reconnection in the cusp during strongly negative IMF By
Farrugia, C. J.; Buchert, S.; Khotyaintsev, Y. +6 more
We investigate transient magnetic reconnection (flux transfer events, FTEs) in the cusp and its ionospheric signatures. We present in situ observations by the Polar spacecraft of multiple impulsive plasma injections and related magnetopause crossings in the outer stagnant cusp of the northern hemisphere. At this time the interplanetary magnetic fi…
Prediction performance of space weather forecast centers following the extreme events of October and November 2003
Oler, Cary
A review and analysis of the five strongest interplanetary coronal mass ejection (ICME) events of late October and early November 2003 (the strongest events of the "Halloween" epoch) are studied with respect to the prediction performance of five space weather forecast centers. Accurate time-of-arrival predictions and rapid responses to the upstrea…
Searching for radiative pumping lines of OH masers: II. The 53.3 µm absorption line towards 1612 MHz OH maser sources
Chen, P. S.; He, J. H.
This is the second paper in a series aiming at searching for infrared pumping lines for galactic 1612 MHz OH masers. Our paper I is devoted to the 34.6 µm absorption lines in ISO SWS spectra towards a large sample of galactic OH/IR sources. This paper analyzes the 53.3 µm line in the ISO LWS spectra towards a similar sample of OH/IR so…
Chromospheric Oscillations in an Equatorial Coronal Hole
McIntosh, Scott W.; Tarbell, Theodore D.; Fleck, Bernhard
We report phase-difference and travel-time analyses of propagating chromospheric oscillations in and around an equatorial coronal hole as observed by TRACE. Our results suggest a significant change in atmospheric conditions at the base of the chromosphere inside the coronal hole relative to its boundary and quiet-Sun regions.
Proper Motion and Kinematics of the Ansae in NGC 7009
Monteiro, Hektor; Schwarz, Hugo E.; Fernández, Rodrigo
We have measured the proper motion (PM) and kinematics of the ansae in NGC 7009 using high-dispersion echelle spectra and archive narrowband Hubble Space Telescope images. Assuming that the ansae are moving at equal and opposite velocities from the central star, we obtain a system radial velocity of -53+/-2 km s-1, the eastern ansa appr…