Search Publications
The Hot Components of AM CVn Helium Cataclysmics
Sion, Edward M.; Godon, Patrick; Linnell, Albert P. +1 more
We present the results of a multi-component synthetic spectral analysis of the archival far-ultraviolet spectra of the hot components of several AM CVn double degenerate interacting binaries with known distances from trigonometric parallaxes. Our analysis was carried out using the code BINSYN, which takes into account the donor companion star, the…
About the relative importance of compressional heating and current dissipation for the formation of coronal X-ray bright points
Otto, A.; Büchner, J.; Santos, J. C. +1 more
Context. The solar corona is heated to high temperatures of the order of 106 K. The coronal energy budget and specifically possible mechanisms of coronal heating (wave, DC-electric fields, etc.) are poorly understood. This is particularly true for the formation of X-ray bright points (BPs) is concerned.
Aims: We aim to investigate …
Solar particle event analysis using the standard radiation environment monitors: applying the neutron monitor's experience
Mavromichalaki, H.; Papaioannou, A.; Souvatzoglou, G. +3 more
The Standard Radiation Environment Monitor (SREM) is a particle detector developed by the European Space Agency for satellite applications with the main purpose to provide radiation hazard alarms to the host spacecraft. SREM units have been constructed within a radiation hardening concept and therefore are able to register extreme solar particle e…
Scaling law of the reduced magnetic helicity in fast streams
Perri, S.; Balogh, A.; Bruno, R. +2 more
The reduced magnetic helicity is a quantity related to the handedness of the magnetic field fluctuations. In the present paper we study the scaling law of the reduced magnetic helicity in fast streams in the solar wind by using high-resolution magnetic field data by the Ulysses spacecraft. We show that at high frequencies both the left-hand and th…
Large-amplitude photometric variability of the candidate protoplanet TMR-1C
Martín, E. L.; Riaz, B.
Context. TMR-1C is a candidate protoplanet that lies at a separation of about 10” (~1000 AU) from the Class I protobinary TMR-1 (IRAS 04361+2547) located in the Taurus molecular cloud. A narrow filament-like structure was observed in the discovery HST/NICMOS images, extending southeast from the central proto-binary system towards TMR-1C, suggestin…
Statistical techniques for the detection and analysis of solar explosive events
Sarro, L. M.; Berihuete, A.
Context. Solar explosive events are commonly explained as small-scale magnetic reconnection events, although an unambiguous confirmation of this scenario remains elusive owing to the lack of spatial resolution and the statistical analysis of sufficiently large samples of this type of events.
Aims: We propose a sound statistical treatment of d…
Magnetotail dynamics: survey of recent progress
Birn, J.
Properties of Near-surface Flows around Active Regions from Helioseismic Holography
Braun, D. C.; Wan, K.
A variety of local-helioseismic analyses have shown ~50 m/s flows converging on active regions (ARs). We have examined the average properties of both the 75 strongest converging and 75 strongest diverging flows present in Carrington rotation CR1988 within the uppermost 3 Mm of the Sun. The flows, averaged over 5 days, were deduced from calibrated …
Combined Analysis of Ultraviolet and Radio Observations of the 7 May 2004 CME/Shock Event
Mancuso, Salvatore
We report results from the combined analysis of UV and radio observations of a CME-driven shock observed on 7 May 2004 above the southeast limb of the Sun at 1.86 R⊙ with the Ultraviolet Coronagraph Spectrometer (UVCS) on board the Solar and Heliospheric Observatory (SOHO). The coronal mass ejection (CME) was first detected in white-lig…
Saturn's low-latitude boundary layer: 2. Electron structure
Coates, A. J.; Dougherty, M. K.; Fazakerley, A. N. +2 more
The boundary of a planetary magnetosphere is the site of mass, momentum, and energy transport. This transport produces a layer of mixed solar wind and magnetospheric plasma inside and adjacent to the boundary. In the case of Earth, the electron structure of this layer is distinctive, and has been explained by models of the layer on open magnetic f…