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Oblique propagation of 30 s period fast magnetosonic foreshock waves: A Cluster case study
Balogh, A.; Dandouras, I.; Eastwood, J. P. +2 more
It is accepted that the 30 s period Ultra-Low-Frequency waves observed in the terrestrial foreshock are generated by backstreaming ions through the ion-ion right hand instability. However, such waves are generally observed to propagate obliquely to the field, in direct contrast to theoretical predictions of parallel propagation. A case study, base…
The structure of high altitude O+ energization and outflow: a case study
Lundin, R.; Balogh, A.; Dandouras, I. +10 more
Available from http://www.copernicus.org/site/EGU/annales/22/7/2497.htm?FrameEngine=false;
Ionized gas and stars in the central kiloparsec of the type 2 Seyfert galaxy NGC 2110 - I. The data
Schinnerer, E.; Wilson, A. S.; Emsellem, E. +4 more
In this paper, we present new results from an extensive set of Hubble Space Telescope (HST) and ground-based observations of the Seyfert galaxy NGC 2110. The HST data sets include Wide Field Planetary Camera 2 (WFPC2) observations as well as the first high-spatial resolution spectroscopy ([OI], [NII], Hα and [SII] lines) of this galaxy obtained us…
An ISOCAM survey through gravitationally lensing galaxy clusters. II. The properties of infrared galaxies in the A2218 field
Kneib, J. -P.; Altieri, B.; Kessler, M. F. +10 more
We have observed the cluster Abell 2218 (z=0.175) with ISOCAM on board the Infrared Space Observatory using two filters, LW2 and LW3, with reference wavelengths of 6.7 and 14.3 µm, respectively. We detected 76 sources down to 54 and 121 µJy (50% completeness levels) at 6.7 and 14.3 µm, respectively. All these sources have visible…
X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature
Ubertini, P.; Bazzano, A.; Heise, J. +6 more
SAX J1747.0-2853 is an X-ray transient which exhibited X-ray outbursts yearly between 1998 and 2001, and most probably also in 1976. The outburst of 2000 was the longest and brightest. We have analyzed X-ray data sets that focus on the 2000 outburst and were obtained with BeppoSAX, XMM-Newton and RXTE. The data cover unabsorbed 2-10 keV fluxes bet…
Compressional waves in the Earth's neutral sheet
Balogh, A.; Glassmeier, K.; Klecker, B. +10 more
. Compressional waves in the Earth's current sheet, driven by the high-speed plasma flows connected to substorms, are investigated using the Cluster magnetometer and plasma instrument. During the time that Cluster had its apogee in the magnetotail (July through October 2001), we have studied 5 events in detail. We find compressional waves in the 3…
Deceleration of the rotational velocities of sunspot groups during their evolution
Wöhl, H.; Brajša, R.; Ruždjak, V. +1 more
Using the Greenwich Photoheliographic Results for the years 1874-1976 the daily rotational velocities for 955 recurrent and 13169 non-recurrent sunspot groups from the first day of their appearance and during their evolution have been determined. The rotational velocities were divided in six latitude strips with a width of five degrees and grouped…
Self-Gravitating Eccentric Disk Models for the Double Nucleus of M31
Statler, Thomas S.; Salow, Robert M.
We present new dynamical models of weakly self-gravitating, finite dispersion eccentric stellar disks around central black holes for the double nucleus of M31. The disk is fixed in a frame rotating at constant precession speed and is populated by stars on quasi-periodic orbits whose parents are numerically integrated periodic orbits in the total p…
Spatially Resolved Ultraviolet Spectra of the High-Velocity Nuclear Outflow of NGC 1068
Ferruit, Pierre; Dopita, Michael A.; Cecil, Gerald +1 more
We present ultraviolet emission-line maps of the narrow-line region (NLR) of NGC 1068. The maps span 115-318 nm, the biconical ionization cone, and several posited jet-ISM interactions, and the compact knots whose optical spectra we reported previously resemble kinematically the quasar associated absorption line systems. Across the NLR, we find th…
The potential of INTEGRAL for the detection of high redshift GRBs
Westergaard, N. J.; Lund, N.; Gorosabel, J. +2 more
We discuss INTEGRAL's ability to detect a high redshift population of Gamma-Ray Bursts (GRBs) in comparison to other high-energy missions. Emphasis is placed on the study of the relative capabilities of IBIS on board INTEGRAL with respect to SWIFT and HETE 2 in detecting a high redshift population of GRBs. We conclude that, if the GRB rate is prop…