Listed are all scientific papers resulting from an ISSI activity written or co-authored by ISSI Team members, Working Group members, Workshop participants, visitors or staff members.
Metallic ions are commonly found in the cis‐lunar environment, primarily produced through the neutral lunar exosphere. They become prevalent species of lunar pickup ions as the Moon moves through the solar wind upstream, magnetosheath, and magnetotail.
Magnetic reconnection is a ubiquitous plasma process that transforms magnetic energy into particle energy during eruptive events throughout the universe. Reconnection not only converts energy during solar flares and geomagnetic substorms that drive space weather near Earth, but it may also play critical roles in the high energy emissions from the magnetospheres of neutron stars and black holes.
Magnetic pulsations of type Pi2 are a well-established category of Ultra Low Frequency (ULF) waves, characterized by irregularly damped oscillations with periods ranging from 40 to 150 seconds (6.7–25 mHz). Nowadays, it is well known that Pi2 occurs at the onset of geomagnetic substorms, is considered an outstanding research topic in space physics, and is a link between ionospheric and magnetospheric processes.
We report the detection of water vapor associated with main-belt comet 358P/PANSTARRS on UT 2024 January 8–9 using the NIRSPEC instrument on board JWST. We derive a water production rate of QH2O=(5.0±0.2)×1025 molecules s−1, marking only the second direct detection of sublimation products of any kind from a main-belt comet, after 238P/Read. Similar to 238P, we find a remarkable absence of hypervolatile species, finding QCO2<7.6×1022 molecules s−1, corresponding to QCO2/QH2O<0.2 %.
Remote brightening (RB) is compact brightening at footpoints of magnetic loops, which are remotely connecting to and confining an eruption in the solar atmosphere. Here, we report on observations of an RB resulting from an EUV jet with a speed of about 90 km s−1. The loops connecting the RB and the jet have an apparent length of about 59 Mm. Intriguingly, the RB exhibits at least two episodes of brightenings, as characterized by two peaks in its lightcurve.
The diffuse stellar component of galaxy clusters known as intracluster light (ICL) has been proposed as an observable tracer of the cluster’s dark matter (DM) halo. Assessing its reliability as a DM tracer requires understanding how the intracluster stars are energetically linked to the underlying DM distribution, which we investigate at $zapprox 0$ in 12 galaxy clusters with $M_{178} = 1.18 – 3.71 times 10^{14}, rm {M}_odot$ from the Horizon- AGN simulation.
Context. One of the key tools for understanding the evolution of young stellar objects (YSOs) is to analyse their spectral energy distributions (SEDs). As part of the NEMESIS project, we have performed a large-scale SED fitting analysis of the Orion star formation complex (OSFC). Aims. We aim to derive key physical parameters, including temperature, luminosity, mass, and age, for a large sample of sources in the OSFC using synthetic SED models.
Abstract Atmospheric jet streams belong to the most fundamental elements of the global general circulation system and are susceptible to climate change. Jet stream variability in our present climate is usually studied from modern reanalysis products, although uncertainties arise due to insufficiently strong constraints of the underlying global wind field by the available observational records, especially concerning their long-term trends.
The fluid behavior of the solar wind is affected by the heat flux carried by the suprathermal electron populations, especially the electron strahl (or beam) that propagates along the magnetic field. In turn, the electron strahl cannot be stable, and in the absence of collisions, its properties are regulated mainly by self-generated instabilities.
A recent study of the distribution of dwarf galaxies in the MATLAS sample in galaxy groups revealed an excess of flattened satellite structures, reminiscent of the co-rotating planes of dwarf galaxies discovered in the local Universe. If confirmed, this lends credence to the plane-of-satellite problem and further challenges the standard model of hierarchical structure formation.
