Search Publications
Missions
Journals
Publication Years
Explosive Events and the Evolution of the Photospheric Magnetic Field
Muglach, K.
Transition region explosive events have long been suggested as direct signatures of magnetic reconnection in the solar atmosphere. In seeking further observational evidence to support this interpretation, we study the relation between explosive events and the evolution of the solar magnetic field as seen in line-of-sight photospheric magnetograms.…
Interpretation of high rate dust measurements with the Cassini dust detector CDA
Kempf, Sascha
For two years the cosmic dust analyser (CDA) onboard the Cassini spacecraft has been exploring the dust environment of Saturn [Srama, R., Kempf, S., Moragas-Klostermeyer, G., Helfert, S., Ahrens, T. J., Altobelli, N., Auer, S., Beckmann, U., Bradley, J.G., Burton, M., Dikarev, V.V., Economou, T., Fechtig, H., Green, S.F., Grande, M., Havnes, O., H…
From Titan’s tholins to Titan’s aerosols: Isotopic study and chemical evolution at Titan’s surface
Szopa, Cyril; Cernogora, Guy; Raulin, François +5 more
In the present work, we focused on the possible isotopic fractionation of carbon during the processes involved in the formation of Titan’s tholins. We present the first results obtained on the 12C/13C isotopic ratios measured on Titan’s tholins synthesized in laboratory with cold plasma discharges. Measurements of isotopic ra…
XMM-Newton Observations of IGR J00291+5934: Signs of a Thermal Spectral Component during Quiescence
Stella, Luigi; Campana, Sergio; D'Avanzo, Paolo +1 more
We present X-ray observations of the transient accretion-powered millisecond pulsar IGR J00291+5934 during quiescence. IGR J00291+5934 is the first source among accretion-powered millisecond pulsars to show signs of a thermal component in its quiescent spectrum. Fitting this component with a neutron star atmosphere or a blackbody model we obtain s…
Influence of Compton scattering on the broad-band X-ray spectra of intermediate polars
Werner, K.; Poutanen, J.; Falanga, M. +1 more
Context: The majority of cataclysmic variables observed in the hard X-ray energy band are intermediate polars where the magnetic field is strong enough to channel the accreting matter to the magnetic poles of the white dwarf. A shock above the stellar surface heats the gas to fairly high temperatures (10-100 keV). The post-shock region cools mostl…
Bayesian Analysis of Solar Oscillations
Kucera, T.; Marsh, M. S.; Ireland, J.
A Bayesian probability-based approach is applied to the problem of detecting and parameterizing oscillations in the upper solar atmosphere for the first time. Due to its statistical origin, this method provides a mechanism for determining the number of oscillations present, gives precise estimates of the oscillation parameters with a self-consiste…
Probing solar and stellar interior dynamics and dynamo
Kosovichev, Alexander G.
Solar and stellar activity is a result of complex interaction between magnetic field, turbulent convection and differential rotation in a star’s interior. Magnetic field is believed to be generated by a dynamo process in the convection zone. It emerges on the surface forming sunspots and starspots. Localization of the magnetic spots and their evol…
Solar Origin of the Radio Attributes of a Complex Type III Burst Observed on 11 April 2001
Klein, K. -L.; Kaiser, M. L.; Bougeret, J. -L. +4 more
We report here on the solar origin of distinctive radiation characteristics observed for a decametric type III solar radio burst that was associated with a major solar flare and CME on 11 April 2001. The associated decimeter (Ondřejov) and meter (Potsdam) wavelength emissions, as well as the GOES soft X-ray lightcurve, suggest that there were two …
The nearest X-ray emitting protostellar jet (HH 154) observed with Hubble
Liseau, R.; Micela, G.; Bonito, R. +4 more
Context: The jet coming from the YSO binary
First analyses of planar magnetic structures associated with the Halloween 2003 events from the Earth to Voyager 1 at 93 AU
Intriligator, Devrie S.; Horbury, Timothy S.; Rees, Adam
We perform the first analyses of planar magnetic structures beyond 5 AU. We also perform the first analyses of planar magnetic structures associated with the Halloween 2003 solar events. Our analyses show that planar magnetic structures (PMS) are associated with the interplanetary manifestation of the Halloween 2003 solar events over a wide range …