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.
Using deep JWST/NIRSpec spectra from the Blue Jay survey, we performed the first systematic investigation of neutral gas content in massive galaxies at Cosmic Noon based on the Ca II H, K absorption lines. We analyzed a sample of nine galaxies at 1.8 < z < 2.8 with log M*/M⊙ > 10.6, for which we detected neutral gas absorption both in Ca II and in Na I.
The heliospheric current sheet (HCS) is an important large-scale structure of the heliosphere, and, for the first time, the Parker Solar Probe (PSP) mission enables us to study its properties statistically, close to the Sun.
Potential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes. We analyze 702 observed coronal holes between 2010 and 2019 and compute corresponding PFSS magnetic field extrapolations to examine their magnetic topology and loop statistics, comparing them with quiet-Sun regions.
Interface Region Imaging Spectrograph bright points (IBPs) are ubiquitous, small-scale energetic events with a multithermal nature, typically observed in the chromosphere or transition region and closely linked to photospheric structure and coronal composition. Their evolution is shaped by various physical processes, including plasma dynamics and magnetic interactions.
We present a systematic survey of strange mode pulsations in Cepheids using MESA and for the linear stability analysis, MESA RSP. Our model grid spans 2–15 M⊙in mass and [Fe/H] = −0.95–0.17 (Z = 0.0015–0.0200) in metallicity, with four convective overshoot prescriptions. Strange modes were identified in a relatively small fraction (∼5–12.5%) of models, occurring at npg = 5–9, with npg = 6–7 as the most frequent radial modes.
We present homogeneous, near-infrared (JHKs bands) time-series observations of the classical Carina dwarf spheroidal (dSph) galaxy to determine accurate and precise distances using the pulsating stars as standard candles. These observations cover two Carina dSph fields ( ∼10.′8×10.′8 ) obtained with the FourStar infrared camera mounted on the 6.5 m Magellan Telescope.
The shape of the heliosphere, regarded as comet-like since the 1960s, has recently been the subject of intense debate in the last decade. There is disagreement as to whether the heliospheric tail extends to ∼10,000 au in a comet-like shape or if it is short (∼400 au) with a split.
Abstract. For satellite measurements of atmospheric composition, the random uncertainty estimates provided by retrieval algorithms might be imperfect due to various approximations used in the retrievals or the presence of unknown error sources. This paper presents an overview of the methods used for the validation of random uncertainty estimates. All methods discussed in this study are categorized, and assumptions and limitations of each method are discussed.
Studying coronal rain formation through thermal non-equilibrium (TNE) and thermal instability (TI) provides insights into coronal heating mechanisms.
Ring current modeling has been a subject of active research in the last two decades. However, accurately modeling of this population of particles remains a challenge. Several recent studies have demonstrated that ring current models can overestimate the trapped electron flux in the 10–50 keV range by up to two orders of magnitude during geomagnetic storms.
