Search Publications
Observation of magnetic reconnection and current sheets in the solar wind
Miranda, Rodrigo A.; Chian, Abraham C. -L.; Muñoz, Pablo R. +1 more
We apply single- and multi-spacecraft techniques to search for currents sheets in the solar wind during the ICME event of 21 January 2005, using the Cluster magnetic field data. Two large-scale currents sheets are detected at the leading boundary of the ICME ejecta using the single-spacecraft technique, which exhibit physical characteristics typic…
On the Growth of Mirror Mode Waves in the Magnetosheath Based on Cluster Observations
Dandouras, I.; Erdős, G.; Tátrallyay, M. +1 more
The evolution of mirror mode waves was investigated in the magnetosheath based on Cluster magnetic field and plasma measurements during four inbound passes in January-February 2006 when the separation between the spacecraft was about 10,000 km. The growth rates estimated from the amplitudes of the field fluctuations (mainly quasi-sinusoidal oscill…
The Rosetta mission and its fly-by at asteroid 2867 Steins
Schulz, R.
Estrellas Be: diagnóstico del medio circunestelar mediante líneas de H del IR cercano
Granada, A.; Arias, M. L.; Cidale, L. S. +1 more
We describe the behavior of the IR emission lines that appear in the K and L band spectra of Be stars and discuss the physical properties of the circum- stellar envelopes based on the classification scheme proposed by Mennick- ent et al. (2009). We found that for stars of Group I, Pfund and Humphreys lines form in an optical thick region, while fo…
Spectral behavior of AM Her and QQ Vul in high and intermediate states in the UV
Sanad, M. R.
We present low resolution UV spectra of two polar systems, AM Her and QQ Vul from the observations taken by the IUE (International Ultraviolet Explorer) of the period between 1978–1996 and 1983–1996 for both systems respectively, to accomplish a large scale study of what happens to the ultraviolet flux of C IV 1550 Å spectral line during different…
Geomagnetic activity effects on plasma sheet energy conversion
Dandouras, I.; Hamrin, M.; Norqvist, P. +4 more
In this article we use three years (2001, 2002, and 2004) of Cluster plasma sheet data to investigate what happens to localized energy conversion regions (ECRs) in the plasma sheet during times of high magnetospheric activity. By examining variations in the power density, E·J, where E is the electric field and J is the current density obtained by …
Environmental Effects in the Evolution of Galactic Bulges
Treu, Tommaso; Ellis, Richard S.; Moran, Sean M. +1 more
We investigate possible environmental trends in the evolution of galactic bulges over the redshift range 0 < z < 0.6. For this purpose, we construct the fundamental plane (FP) for cluster and field samples at redshifts langzrang = 0.4 and langzrang = 0.54 using surface photometry based on Hubble Space Telescope imaging and velocity dispersio…
Soft X-ray emission from the inner disc of M33
Warwick, R. S.; Owen, R. A.
We present a study, based on archival XMM-Newton observations, of the extended X-ray emission associated with the inner disc of M33. After the exclusion of point sources with LX > 2 × 1035ergs-1 (0.3-6 keV), we investigate both the morphology and spectrum of the residual X-ray emission, comprising the integrated…
On the possibility of coupling satellite and ground-based optical measurements in the region of pulsating auroras
Safargaleev, V. V.; Shibaeva, D. N.; Sergienko, T. I. +1 more
The possibility of comparing in detail CLUSTER satellite data with data on pulsating spots registered with a TV camera at the Lovozero Observatory when the satellite crossed the magnetospheric region related to the camera's field of view is discussed. The satellite ionospheric projections were calculated using the T89, T96, and T01 models. It was …
Multiple origins of linear dunes on Earth and Titan
Rubin, David M.; Hesp, Patrick A.