Search Publications
New compact hierarchical triple system candidates identified using Gaia DR3
Mitnyan, T.; Pál, A.; Borkovits, T. +5 more
Aims: We introduce a novel way to identify new compact hierarchical triple stars by exploiting the huge potential of Gaia DR3 and also its future data releases. We aim to increase the current number of compact hierarchical triple systems significantly.
Methods: We used several eclipsing binary catalogs from different sky surveys that lis…
The Planck clusters in the LOFAR sky. III. LoTSS-DR2: Dynamic states and density fluctuations of the intracluster medium
Simionescu, A.; Kaastra, J. S.; Zhang, X. +19 more
Context. The footprint of the recent second data release of the LOFAR Two-metre Sky Survey (LoTSS-DR2) covers 309 Planck Sunyaev-Zeldovich (SZ) selected galaxy clusters, 83 of which host a radio halo and 26 host a radio relic(s). It provides an excellent opportunity to statistically study the properties of extended cluster radio sources, especiall…
The Enhanced Resolution Imager and Spectrograph for the VLT
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +82 more
The Enhanced Resolution Imager and Spectrograph (ERIS) is an instrument that both extends and enhances the fundamental diffraction limited imaging and spectroscopy capability for the VLT. It replaces two instruments that were being maintained beyond their operational lifetimes, combines their functionality on a single focus, provides a new wavefro…
Rotation and interaction of the CMEs of September 8 and 10, 2014, tested with EUHFORIA
Poedts, Stefaan; Scolini, Camilla; Schmieder, Brigitte +1 more
Context. Solar coronal mass ejections (CMEs) can catch up and interact with preceding CMEs and solar wind structures to undergo rotation and deflection during their propagation. Aim. We aim to show how the interactions of a CME in the corona and heliosphere can play a significant role in altering its geoeffectiveness as predicted at the time of it…
A mini-chemical scheme with net reactions for 3D general circulation models. II. 3D thermochemical modelling of WASP-39b and HD 189733b
Hammond, Mark; Lee, Elspeth K. H.; Tan, Xianyu +1 more
Context. The chemical inventory of hot Jupiter (HJ) exoplanet atmospheres continues to be observed by various ground- and space-based instruments in increasing detail and precision. It is expected for some HJs to exhibit strong non-equilibrium chemistry characteristics in their atmospheres, which might be inferred from spectral observations.
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Clouds form on the hot Saturn JWST ERO target WASP-96b
Helling, Ch.; Min, M.; Carone, L. +3 more
Context. WASP-96b is a hot Saturn exoplanet, with an equilibrium temperature of ≈1300 K. This is well within the regime of thermo-dynamically expected extensive cloud formation. Prior observations with Hubble/WFC3, Spitzer/IRAC, and VLT/FORS2 have been combined into a single spectrum for which retrievals suggest a cold but cloud-free atmosphere. R…
Spiral-like features in the disc revealed by Gaia DR3 radial actions
Recio-Blanco, A.; Antoja, T.; McMillan, P. J. +3 more
Context. The so-called action variables are specific functions of the positions and velocities that remain constant along the stellar orbit. The astrometry provided by Gaia Early Data Release 3 (EDR3), combined with the velocities inferred from the Radial Velocity Spectrograph (RVS) spectra of Gaia DR3, allows for the estimation of these actions f…
SRG/eROSITA X-ray shadowing study of giant molecular clouds
Ponti, G.; Freyberg, M. J.; Sasaki, M. +3 more
Context. SRG/eROSITA is situated in a halo orbit around L2 where the highly variable solar wind charge exchange (SWCX) emission from Earth's magnetosheath is expected to be negligible. The soft X-ray foreground emissions from the local hot bubble (LHB) and the remaining heliospheric SWCX emissions could be studied in unprecedented detail with eROS…
New insights on the near-infrared veiling of young stars using CFHT/SPIRou data
Carmona, A.; Donati, J. -F.; Doyon, R. +9 more
Context. Veiling is ubiquitous at different wavelength ranges in classical T Tauri stars. However, the origin of the veiling in the infrared (IR) domain is not well understood at present. The accretion spot alone is not enough to explain the shallow photospheric IR lines in accreting systems, suggesting that another source is contributing to the v…
Barium and related stars, and their white-dwarf companions. III. The masses of the white dwarfs
Escorza, A.; De Rosa, R. J.
Context. Masses are one of the most difficult stellar properties to measure. In the case of the white-dwarf (WD) companions of Barium (Ba) stars, the situation is worse. These stars are dim, cool, and difficult to observe via direct methods. However, Ba stars were polluted by the asymptotic giant branch (AGB) progenitors of these WDs with matter r…