Search Publications
Radio emission from a massive node of the cosmic web: A discovery powered by machine learning
Gavazzi, R.; Botteon, A.; Umetsu, K. +4 more
Context. The recent detection of radio emission extending beyond the scales typically associated with radio halos challenges our understanding of how energy is transferred to the non-thermal components on the outskirts of galaxy clusters, suggesting the crucial role of mass accretion processes. So far, discoveries have relied on the visual identif…
Influence of a continuous plane gravitational wave on Gaia-like astrometry
Klioner, S. A.; Lindegren, L.; Geyer, R. +1 more
Context. A gravitational wave (GW) passing through an astrometric observer causes periodic shifts of the apparent star positions measured by the observer. For a GW of sufficient amplitude and duration, at a suitable frequency, these shifts might be detected with a Gaia-like astrometric telescope. Aims. This paper is aimed at making a detailed anal…
Euclid: Detecting Solar System objects in Euclid images and classifying them using Kohonen self-organising maps
Altieri, B.; Cimatti, A.; Aghanim, N. +141 more
The ESA Euclid mission will survey more than 14 000 deg2 of the sky in visible and near-infrared wavelengths, mapping the extragalactic sky to constrain our cosmological model of the Universe. Although the survey focusses on regions further than 15° from the ecliptic, it should allow for the detection of more than about 105 S…
X-ray activity of nearby G-, K-, and M-type stars and implications for planet habitability around M stars
Preibisch, T.; Zhu, E.
Context. The intense X-ray and UV emission of some active M stars has raised questions about the habitability of planets around M-type stars. Aims. We aim to determine the unbiased distribution of X-ray luminosities in complete, volume-limited samples of nearby M dwarfs, and compare them to those of K and G dwarfs. Methods. We constructed volume-c…
Testing the asteroseismic estimates of stellar radii with surface brightness-colour relations and Gaia DR3 parallaxes: II. Red giants and red clump stars from the Kepler catalogue
Valle, G.; Dell'Omodarme, M.; Prada Moroni, P. G. +1 more
Context. A recent investigation highlighted peculiar trends between the radii derived from surface brightness-colour relations (SBCRs) combined with Gaia DR3 parallaxes with respect to asteroseismic scaling relation radii from K2 data. Aims.Kepler data differ from K2 data in many aspects. We investigated on the robustness of the results based on K…
RIS: Regularized imaging spectroscopy for STIX on board Solar Orbiter
Volpara, Anna; Piana, Michele; Maria Massone, Anna +3 more
Context. The generation of spatially resolved count spectra and of cubes of count maps at different energies via imaging spectroscopy is one of the main goals of solar hard X-ray missions based on Fourier imaging. Thus, so far, for these telescopes, this goal has been realized via the generation of either count maps that are independently reconstr…
Unveiling VVV/WISE Mira variables on the far side of the Galactic disk: Distances, kinematics, and a new extinction law
Zoccali, M.; Contreras Ramos, R.; Salvo-Guajardo, C. +8 more
Context. The structure and kinematics of the Milky Way disk are largely inferred from the solar vicinity. To gain a comprehensive understanding, it is essential to find reliable tracers in less explored regions such as the bulge and the far side of the disk. Mira variables, which are well studied and bright standard candles, offer an excellent opp…
Pulsating ultraluminous X-ray sources: Modeling the thermal emission and polarization properties
Israel, G. L.; Turolla, R.; Pintore, F. +4 more
Context. Ultraluminous X-ray sources (ULXs) are enigmatic sources first discovered in the 1980s in external galaxies. They are characterized by their extraordinarily high X-ray luminosity, which often exceeds 1040 erg s‑1. Aims. Our study aims to obtain more information about pulsating ULXs (PULXs), first of all, their viewin…
The GAPS Programme at TNG: LXV. Precise density measurement of TOI-1430 b, a young planet with an evaporating atmosphere
Baratella, M.; Mallonn, M.; Scandariato, G. +34 more
Context. Small-sized (<4 R⊕) exoplanets in tight orbits around young stars (10–1000 Myr) give us the opportunity to investigate the mechanisms that led to their formation, the evolution of their physical and orbital properties, and, in particular, their atmospheres. Thanks to the all-sky survey carried out by the TESS spacecraft, man…
Spectral features and variable circular polarisation in the radio emission from the pre-cataclysmic variable QS Vir
Heinke, C. O.; Sivakoff, G. R.; Hughes, A. K. +2 more
Context. QS Vir is a low-accretion rate cataclysmic variable (CV), or pre-CV, as the M dwarf companion is just filling its Roche lobe. We recently identified radio emission from QS Vir in the Very Large Array Sky Survey (VLASS), at a flux of ∼1 mJy. The origin of radio emission from CVs is not fully understood, with evidence for synchrotron emissi…