Search Publications
Cluster Observations of Energetic Electron Acceleration Within Earthward Reconnection Jet and Associated Magnetic Flux Rope
Daly, P. W.; Vaivads, A.; Khotyaintsev, Yu. V. +3 more
We study acceleration of energetic electrons in an earthward plasma jet due to magnetic reconnection in the Earth magnetotail for one case observed by Cluster. The case has been selected based on the presence of high fluxes of energetic electrons, Cluster being in the burst mode and Cluster separation being around 1,000 km that is optimal for stud…
VVV survey near-infrared colour catalogue of known variable stars
Minniti, D.; Saito, R. K.; Catelan, M. +4 more
Context. The Vista Variables in the Via Lactea (VVV) near-infrared variability survey explores some of the most complex regions of the Milky Way bulge and disk in terms of high extinction and high crowding.
Aims: We add a new wavelength dimension to the optical information available at the American Association of Variable Star Observers Inter…
A tale of two tails: insights from simulations into the formation of the peculiar dwarf galaxy NGC 1427A
Peletier, R. F.; Mastropietro, M.; De Rijcke, S.
We present a scenario for the formation and the morphology of the arrow-shaped dwarf irregular galaxy NGC 1427A in the Fornax Cluster. This galaxy shows intriguing stellar and gaseous tails pointing in different directions for which alternative but not conclusive formation scenarios have been proposed in the literature. We performed N-body/SPH sim…
Using a Heliospheric Upwinding eXtrapolation (HUX) Technique to Magnetically Connect Different Regions of the Heliosphere
Riley, Pete; Issan, Opal
Understanding how coronal structure propagates and evolves from the Sun and into the heliosphere has been thoroughly explored using sophisticated MHD models. From these, we have a reasonably good working understanding of the dynamical processes that shape the formation and evolution of stream interaction regions and rarefactions, including their l…
Characterizing the X-Ray Emission of Intermediate-mass Pre-main-sequence Stars
Binder, Breanna A.; Townsley, Leisa K.; Broos, Patrick S. +2 more
We use X-ray and infrared observations to study the properties of three classes of young stars in the Carina Nebula: intermediate-mass (2-5 M⊙) pre-main-sequence stars (IMPS; i.e., intermediate-mass T Tauri stars), late-B and A stars on the zero-age main sequence (AB), and lower-mass T Tauri stars (TTS). We divide our sources among thes…
High Mach Number Quasi-Perpendicular Shocks: Spatial Versus Temporal Structure
Russell, C. T.; Omidi, N.; Howes, G. G. +1 more
Planetary bow shocks are a natural laboratory for investigating the physics of collisionless shocks. Given that spacecraft observations provide us with information regarding the temporal structure of the shock, often multi-spacecraft missions and kinetic simulations are needed to discern the nature of the dissipation processes at the shock and the…
Investigation of the Physical Origin of Overionized Recombining Plasma in the Supernova Remnant IC 443 with XMM-Newton
Seta, Masumichi; Uchida, Hiroyuki; Tsuru, Takeshi Go +4 more
The physical origin of the overionized recombining plasmas (RPs) in supernova remnants (SNRs) has been attracting attention because its understanding provides new insight into SNR evolution. However, the process of the overionization, although it has been discussed in some RP-SNRs, is not yet fully understood. Here, we report on spatially resolved…
Properties of Type III and Type IIIb Bursts in the Frequency Band of 8 - 80 MHz During PSP Perihelion at the Beginning of April 2019
Konovalenko, A. A.; Melnik, V. N.; Dorovskyy, V. V. +4 more
Properties of type III and type IIIb bursts in the frequency band of 8 - 80 MHz observed by the radio telescopes Ukrainian Radio Interferometer of NASU-2 (URAN-2) (Poltava) and Giant Ukrainian Radio Telescope (GURT) (Kharkiv) during the Parker Solar Probe (PSP) perihelion in April 2019 are discussed. These correspond to those that were observed by…
TOI-1749: an M dwarf with a Trio of Planets including a Near-resonant Pair
Tamura, M.; Pallé, E.; Béjar, V. J. S. +66 more
We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photo…
Magnetic Connections across the Chromosphere-Corona Transition Region
Judge, Philip
The plasma contributing to emission from the Sun between the cool chromosphere (≤104 K) and hot corona (≥106 K) has been subjected to many different interpretations. Here we look at the magnetic structure of this transition region (TR) plasma, based upon the implications of CLASP2 data of an active region recently published b…