Search Publications
Supernova remnants on the outskirts of the Large Magellanic Cloud
Maitra, Chandreyee; Sasaki, Manami; Zangrandi, Federico +13 more
When a star dies, it can explode in a supernova, causing a strong shock wave and forming an interstellar object called a supernova remnant (SNR). Observational studies of SNRs allow us to learn about the different types of progenitors, the explosion mechanisms, the physics of interstellar shocks, and the matter cycle in galaxies. We report on the …
Magnetic connectivity of coronal loops and flare-accelerated electrons in a B-class flare: Based on X-ray, EUV (DEM analysis), and type-III radio burst observations
Magdalenić, J.; Mann, G.; Zucca, P. +7 more
Context. In solar flares, non-potential magnetic field energy is transferred to particle acceleration, heating, and radiation. Multi-wavelength observations of the solar corona in extreme ultraviolet (EUV) and X-ray show the consequences of magnetic reconfiguration in lower heights, while radio observations contain information about the access of …
The GAPS programme at TNG: LXIV. An inner eccentric sub-Neptune and an outer sub-Neptune-mass candidate around BD+00 444 (TOI-2443)
Sozzetti, A.; Lanza, A. F.; Collins, K. A. +25 more
Context. Super-Earths and sub-Neptunes are the most common types of planets outside the Solar System and likely represent the link between terrestrial planets and gas giants. Characterizing their physical and orbital properties and studying their multiplicity are key steps in testing and understanding their formation, migration, and evolution. Aim…
KOBE-1: The first planetary system from the KOBE survey: Two planets likely residing in the sub-Neptune mass regime around a late K-dwarf
Nagel, E.; Aceituno, J.; Morales, J. C. +35 more
Context. K-dwarf stars are promising targets in the exploration of potentially habitable planets. Their properties, falling between G and M dwarfs, provide an optimal trade-off between the prospect of habitability and ease of detection. The KOBE experiment is a blind-search survey exploiting this niche, monitoring the radial velocity of 50 late-ty…
Instantaneous asymmetry of the Martian bow shock: A single- and dual-spacecraft study using MAVEN and Mars Express
Goetz, Charlotte; Gunell, Herbert; Nesbit-Östman, Sara
Aims. We study the instantaneous asymmetry of the Martian bow shock during a change in the direction of the interplanetary magnetic field (IMF) and for steady-state conditions. Specifically, we study the asymmetry with regard to the convective electric field and to the crustal fields of Mars. Methods. Two methods were used: First, a single-spacecr…
Variability in hot sub-luminous stars and binaries: Machine-learning analysis of Gaia DR3 multi-epoch photometry
Groot, P. J.; Aerts, C.; Ranaivomanana, P. +3 more
Context. Hot sub-luminous stars represent a population of stripped and evolved red giants that is located on the extreme horizontal branch. Since they exhibit a wide range of variability due to pulsations or binary interactions, it is crucial to unveil their intrinsic and extrinsic variability to understand the physical processes of their formatio…
Stellar magnetic activity in Earth 2.0 candidates based on LAMOST DR10
Zhang, Liyun; Han, Xianming L.; Misra, Prabhakar +3 more
Aims. Stellar chromospheric activity can impact the search for exoplanets. Earth 2.0 (ET 2.0) is a space telescope designed for exoplanet detection. In this work, we survey the stellar chromospheric activity in the ET 2.0 target regions to enhance the detection rate of exoplanets. Methods. This work uses Hα and Ca II H&K lines as indicators of chr…
Stellar obliquities of eight close-in gas giant exoplanets
Boffin, H. M. J.; Skarka, M.; Kabath, P. +4 more
The Rossiter–McLaughlin effect allows us to measure the projected stellar obliquity of exoplanets. From the spin-orbit alignment, planet formation and migration theories can be tested to improve our understanding of the currently observed exoplanetary population. Despite having the spin-orbit measurements for more than 200 planets, the stellar obl…
Environmental effects on nearby debris discs
Heras, A. M.; Eiroa, C.; Marshall, J. P. +2 more
Aims. We investigate the influence of the interstellar medium (ISM) on debris discs using a statistical approach. We probe the effect of the ISM on debris disc occurrence rates and on the morphologies of the discs. Methods. We used results from the Herschel Space Observatory DUNES and DEBRIS surveys of 295 nearby FGK dwarf stars imaged at 100 µm a…
Comparative analysis of two episodes of strongly geoeffective coronal mass ejection events in November and December 2023
Romoli, M.; Temmer, M.; Dumbović, M. +8 more
Context. In autumn 2023 a series of close-in-time eruptive events were observed remotely and measured in situ. For that period, we studied a set of analogous events on the Sun, where several coronal mass ejections (CMEs) were launched partly from the same (active) regions close to a coronal hole. The two episodes of events are separated by a full …