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Observations of linear and nonlinear processes in the foreshock wave evolution
Fränz, M.; Glassmeier, K. -H.; Narita, Y. +2 more
Waves in the foreshock region are studied on the basis of a hypothesis that the linear process first excites the waves and further wave-wave nonlinearities distribute scatter the energy of the primary waves into a number of daughter waves. To examine this wave evolution scenario, the dispersion relations, the wave number spectra of the magnetic fi…
Meridional variations in stratospheric acetylene and ethane in the southern hemisphere of the saturnian atmosphere as determined from Cassini/CIRS measurements
Fletcher, L. N.; Irwin, P. G. J.; Teanby, N. A. +4 more
These are the first results from nadir studies of meridional variations in the abundance of stratospheric acetylene and ethane from Cassini/CIRS data in the southern hemisphere of Saturn. High resolution, 0.5 cm -1, CIRS data was used from three data sets taken in June-November 2004 and binned into 2° wide latitudinal strips to increase…
GRB 070311: a direct link between the prompt emission and the afterglow
Troja, E.; Covino, S.; D'Avanzo, P. +30 more
Context: The prompt emission of gamma-ray bursts is mostly thought to be produced in internal shocks of relativistic shells emitted by the progenitor at different times, whereas the late multi-band afterglow is interpreted as the synchrotron emission of electrons swept up by the fireball expanding through the surrounding interstellar medium. The s…
A Possible Magnetar Nature for IGR J16358-4726
Kouveliotou, C.; Walter, R.; Ubertini, P. +10 more
We present detailed spectral and timing analysis of the hard X-ray transient IGR J16358-4726 using multisatellite archival observations. A study of the source flux time history over 6 yr suggests that lower luminosity transient outbursts can be occurring in intervals of at most 1 yr. Joint spectral fits of the higher luminosity outburst using simu…
Ion trap mass spectrometry on a comet nucleus: the Ptolemy instrument and the Rosetta space mission
Todd, John F. J.; Barber, Simeon J.; Wright, Ian P. +14 more
Kinematics of planet-host stars and their relation to dynamical streams in the solar neighbourhood
Pont, F.; Santos, N. C.; Mayor, M. +2 more
We present a detailed study on the kinematics of metal-rich stars with and without planets, and their relation to the Hyades, Sirius and Hercules dynamical streams in the solar neighbourhood. Accurate kinematics have been derived for all the stars belonging to the CORALIE planet search survey. We used precise radial velocity measurements and CCF p…
Acheron Fossae, Mars: Tectonic rifting, volcanism, and implications for lithospheric thickness
Neukum, G.; Hauber, E.; Masson, P. +6 more
The Acheron Fossae region is an ancient crustal block exposed in the northwestern Tharsis province on Mars. It is named after the Acheron Fossae, a particularly well-developed system of extensional tectonic grabens. This study is the first to describe the tectonic inventory in detail, using topographic and image data from the Global Surveyor and M…
RHESSI Microflares: I. X-Ray Properties and Multiwavelength Characteristics
Veronig, A. M.; Hanslmeier, A.; Stoiser, S. +1 more
We study the general X-ray and multiwavelength characteristics of microflares of GOES class A0.7 to B7.4 (background subtracted) detected by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) on 26 September 2003 comparing them with the properties of regular flares. All the events for which X-ray imaging was feasible originated in o…
Electron periodicities in Saturn's outer magnetosphere
Krupp, N.; Krimigis, S. M.; Mitchell, D. G. +1 more
The Magnetospheric Imaging Instrument/Low-Energy Magnetospheric Measurements Sensor (MIMI/LEMMS) instrument on the Cassini spacecraft has measured energetic electrons in the energy range 20-300 keV within Saturn's magnetosphere. In the outer magnetosphere, beyond ∼20 RS, these electrons and their spectral index display strong variations…
Nature of Infrared Sources in 11 µm Selected Sample from Early Data of the AKARI North Ecliptic Pole Deep Survey
Im, M.; Lee, H. M.; Pearson, C. P. +25 more
We present the properties of 11 10^{12} L_{⊙} based on detailed modelling of the SEDs. We also find four AGNs lying at various redshifts in the main sample. In addition, we discuss a few sources that have non-typical SEDs of the main sample, including a brown-dwarf candidate, a steep power-law source, a flat-spectrum object, and an early-type gala…