Search Publications
First determination of the angular dependence of rise and decay times of solar radio bursts using multi-spacecraft observations
Maksimovic, Milan; Kontar, Eduard P.; Chen, Xingyao +3 more
A large arsenal of space-based and ground-based instruments is dedicated to the observation of radio emissions, whether they originate within our solar system or not. Radio photons interact with anisotropic density fluctuations in the heliosphere which can alter their trajectory and influence the properties that are deduced from observations. This…
Quantifying the diffusion of suprathermal electrons by whistler waves between 0.2 and 1 AU with Solar Orbiter and Parker Solar Probe
Maksimovic, M.; Kretzschmar, M.; Berthomier, M. +7 more
Context. The evolution of the solar wind electron distribution function with heliocentric distance exhibits different features that are still unexplained, in particular, the fast decrease in the electron heat flux and the increase in the Strahl pitch angle width. Wave-particle interactions between electrons and whistler waves are often proposed to…
Symbiotic stars in X-rays: IV. XMM-Newton, Swift, and TESS observations
Nuñez, N. E.; Mukai, K.; Sokoloski, J. L. +7 more
White dwarf symbiotic binaries are detected in X-rays with luminosities in the range of 1030–1034 ergs s‑1. Their X-ray emission arises either from the accretion disk boundary layer, from a region where the winds from both components collide, or from nuclear burning on the surface of the white dwarf (WD). In our co…
The GAPS Programme at TNG. LI. Investigating the correlations between transiting system parameters and host chromospheric activity
Scandariato, G.; Pagano, I.; Fossati, L. +28 more
Context. Stellar activity is the most relevant types of astrophysical noise that affect the discovery and characterization of extrasolar planets. On the other hand, the amplitude of stellar activity could hint at an interaction between the star and a close-in giant planet. Progress has been made in recent years in understanding how to deal with st…
Surveys of clumps, cores, and condensations in Cygnus-X. Searching for circumstellar disks
Qiu, Keping; Cao, Yue; Yang, Kai +2 more
Context. Theories and models have suggested that circumstellar disks could channel material to the central protostar, and resist star formation feedback. Our current knowledge of the picture and role of disks around massive protostars is unclear because the observational evidence of these circumstellar disks is limited.
Aims: To investigate w…
Testing the asteroseismic estimates of stellar radii with surface brightness-colour relations and Gaia DR3 parallaxes: Red giants and red clump stars
Valle, G.; Dell'Omodarme, M.; Prada Moroni, P. G. +1 more
Aims. We compared stellar radii derived from asteroseismic scaling relations with those estimated using two independent surface brightness-colour relations (SBCRs) combined with Gaia DR3 parallaxes. Methods. We cross-matched asteroseismic and astrometric data for over 6400 red giant branch (RGB) and red clump (RC) stars from the APO-K2 catalogue w…
Observational study of intermittent solar jets: p-mode modulation
Liu, Yang; Cao, Wenda; Schmieder, Brigitte +7 more
Aims: Recurring jets are observed in the solar atmosphere. They can erupt intermittently over a long period of time. By the observation of intermittent jets, we wish to understand what causes the characteristics of the periodic eruptions.
Methods: We report intermittent jets observed by the Goode Solar Telescope (GST) with the TiO Broadb…
Recovery of coronal dimmings
Veronig, A. M.; Podladchikova, T.; Chikunova, G. +2 more
Context. Coronal dimmings are regions of reduced emission in the lower corona observed in the wake of coronal mass ejections (CMEs), representing their footprints. Studying the lifetime evolution of coronal dimmings helps us to better understand the recovery and replenishment of the corona after large-scale eruptions. Aims. We study the recovery o…
Measuring the intracluster medium velocity structure within the A3266 galaxy cluster
Pinto, C.; Eckert, D.; Gatuzz, E. +7 more
We present a detailed analysis of the velocity structure of the hot intracluster medium (ICM) within the A3266 galaxy cluster, including new observations taken between June and November 2023. Firstly, morphological structures within the galaxy cluster were examined using a Gaussian gradient magnitude (GGM) and an adaptively smoothed GGM filter app…
Early photometric and spectroscopic observations of the extraordinarily bright INTEGRAL-detected GRB 221009A
Sánchez-Ramírez, R.; Pandey, S. B.; Castro-Tirado, A. J. +46 more
Context. GRB 221009A, initially detected as an X-ray transient by Swift, was later revealed to have triggered the Fermi satellite about an hour earlier, marking it as a post-peak observation of the event's emission. This GRB distinguished itself as the brightest ever recorded, presenting an unparalleled opportunity to probe the complexities of GRB…