Search Publications
On the impact of the vertical structure of Martian water ice clouds on nadir atmospheric retrievals from simultaneous EMM/EXI and TGO/ACS-MIR observations.
Trokhimovskiy, Alexander; Korablev, Oleg; Fedorova, Anna +3 more
Retrieving the optical depth of the Martian clouds (
Immersed in Solar Physics
Hirayama, Tadashi
Since I have lived a rather ordinary life, my focus will center on what I have studied, with only exceptional personal matters being discussed. Nevertheless, rather new ideas are presented in Section 6.2 on the flare theory and in Section 9 on the mechanism of the 22-year solar cycle. These ideas have been included in light of my 90 years of age, …
Characterising WASP-43b's interior structure: Unveiling tidal decay and apsidal motion
Rauer, H.; Gandolfi, D.; Csizmadia, Sz. +8 more
Context. Recent developments in exoplanetary research highlight the importance of Love numbers in understanding the internal dynamics, formation, migration history, and potential habitability of exoplanets. Love numbers represent crucial parameters that gauge how exoplanets respond to external forces such as tidal interactions and rotational effec…
Investigating explosive events in a 3D quiet-Sun model: Transition region and coronal response
Chen, Yajie; Peter, Hardi; Przybylski, Damien
Context. Transition region explosive events are characterized by the non-Gaussian profiles of the emission lines that form at transition region temperatures, and they are believed to be manifestations of small-scale reconnection events in the transition region. Aims. Traditionally, the enhanced emission at the line wings is interpreted as bi-direc…
Temporal Evolution of a Network Jet's Physical Properties Inferred from FISS/GST and IRIS Observations
Yurchyshyn, Vasyl; Chae, Jongchul; Cho, Kyuhyoun +6 more
Small-scale jets, such as chromospheric and transition region (TR) network jets, are of great interest regarding coronal heating and solar wind acceleration. Spectroscopic analysis based on multiple spectral lines with different formation temperatures is essential for understanding the physical properties and driving mechanisms of jets. Here, we c…
A Long-term Study of Mrk 50: Appearance and Disappearance of Soft Excess
Naik, Sachindra; Jana, Arghajit; Nandi, Prantik +1 more
We present an extensive temporal and spectral study of the Seyfert 1 AGN Mrk 50 using 15 yr (2007–2022) of multiwavelength observations from XMM-Newton, Swift, and NuSTAR for the first time. From the timing analysis, we found that the source exhibited variability of ∼20% during the 2007 observation, which reduced to below 10% in the subsequent obs…
The Multiwavelength Extinction Law and Its Variation in the Coalsack Molecular Cloud Based on the Gaia, APASS, SMSS, 2MASS, GLIMPSE, and WISE Surveys
Wang, Shu; Jiang, Biwei; Zhao, He +1 more
Accurate interpretation of observations relies on the interstellar dust extinction law, which also serves as a powerful diagnostic for probing dust properties. In this study, we investigate the multiwavelength extinction law of the quiescent, starless molecular cloud Coalsack and explore its potential variation across different interstellar enviro…
New interpretation of the two hard X-ray sources IGR J17503-2636 and IGR J17507-2647
Ponti, G.; Sidoli, L.; Esposito, P. +4 more
We report on the results of X-ray observations (XMM–Newton, INTEGRAL and Swift) of two hard X-ray sources, IGR J17503-2636 and IGR J17507-2647, whose nature is not fully elucidated in the literature. Three XMM–Newton observations covered the field of IGR J17503-2636, in 2020 and twice in 2023. The analysis of the two XMM–Newton observations perfor…
PAStar: A model for stellar surface from the Sun to active stars
Petralia, Antonino; Micela, Giuseppina; Maldonado, Jesús
Context. The characterisation of exoplanets requires a good description of the host star. Stellar activity acts as a source of noise, which can alter planet radii as derived from the transit depth or atmospheric characterisation. Aims. Here, we propose PAStar, a model to describe photospheric activity in the form of spots and faculae, which could …
Effects of the September 2014 coronal mass ejection chain in the inner Solar System and the response of the Martian ionosphere
Sánchez-Cano, B.; Harada, Y.; Ippolito, A.
Context. During September 2014, intense solar activity led to a number of coronal mass ejections (CMEs) propagating in the heliosphere. The strong perturbation in the interplanetary magnetic field and the remarkable enhancements in the energetic particle fluxes accelerated by the shock waves associated with the CMEs affected the environments of th…