Search Publications
Apsidal motion in massive eccentric binaries in NGC 6231. The case of HD 152219
Farnir, M.; Dupret, M. -A.; Rauw, G. +2 more
Context. The measurement of the apsidal motion in close eccentric massive binary systems provides essential information to probe the internal structure of the stars that compose the system.
Aims: Following the determination of the fundamental stellar and binary parameters, we make use of the tidally induced apsidal motion to infer constraints…
Observational evidence for two-component distributions describing solar magnetic bright points
Utz, Dominik; Gömöry, Peter; Kuckein, Christoph +6 more
Context. High-resolution observations of the solar photosphere reveal the presence of fine structures, in particular the so-called Magnetic Bright Points (MBPs), which are small-scale features associated with strong magnetic field regions of the order of kilogauss (kG). It is especially relevant to study these magnetic elements, which are extensiv…
The eROSITA Final Equatorial-Depth Survey (eFEDS). The first archetypal quasar in the feedback phase discovered by eROSITA
Silverman, J. D.; Georgakakis, A.; Salvato, M. +18 more
Theoretical models of the co-evolution of galaxies and active galactic nuclei (AGNs) ascribe an important role in the feedback process to a short, luminous, obscured, and dust-enshrouded phase during which the accretion rate of the supermassive black hole is expected to be at its maximum and the associated AGN-driven winds are also predicted to be…
A strong H− opacity signal in the near-infrared emission spectrum of the ultra-hot Jupiter KELT-9b
Schlawin, E.; Pino, L.; Désert, J. -M. +11 more
We present the analysis of a spectroscopic secondary eclipse of the hottest transiting exoplanet detected to date, KELT-9b, obtained with the Wide Field Camera 3 aboard the Hubble Space Telescope. We complement these data with literature information on stellar pulsations and Spitzer/Infrared Array Camera and Transiting Exoplanet Survey Satellite e…
H2O distribution in the disc of HD 100546 and HD 163296: the role of dust dynamics and planet-disc interaction
Lodato, G.; Fedele, D.; van Dishoeck, E. F. +3 more
Water plays a fundamental role in the formation of planets and their atmospheres. Far-infrared observations with the Herschel Space Observatory revealed a surprisingly low abundance of cold-water reservoirs in protoplanetary discs. On the other hand, a handful of discs show emission of hot water transitions excited at temperatures above a few hund…
Nitrogen fractionation towards a pre-stellar core traces isotope-selective photodissociation
Caselli, P.; Spezzano, S.; Sipilä, O. +1 more
Context. Isotopologue abundance ratios are important to understand the evolution of astrophysical objects and ultimately the origins of a planetary system such as our own. With nitrogen being a fundamental ingredient of pre-biotic material, understanding its chemistry and inheritance is of fundamental importance to understand the formation of the …
The GAPS programme at TNG. XL. A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422
Moutou, C.; Pagano, I.; Winn, J. N. +55 more
Context. Neptunes represent one of the main types of exoplanets and have chemical-physical characteristics halfway between rocky and gas giant planets. Therefore, their characterization is important for understanding and constraining both the formation mechanisms and the evolution patterns of planets.
Aims: We investigate the exoplanet candid…
KMT-2021-BLG-0240: Microlensing event with a deformed planetary signal
Han, Cheongho; Lee, Chung-Uk; Zang, Weicheng +19 more
Aims: The light curve of the microlensing event KMT-2021-BLG-0240 exhibits a short-lasting anomaly with complex features near the peak at the 0.1 mag level from a single-lens single-source model. We conducted modeling of the lensing light curve under various interpretations to reveal the nature of the anomaly.
Methods: It is found that t…
Molecules, shocks, and disk in the axi-symmetric wind of the MS-type AGB star RS Cancri
Lesaffre, P.; Winters, J. M.; Tuan-Anh, P. +6 more
Context. The latest evolutionary phases of low- and intermediate-mass stars are characterized by complex physical processes like turbulence, convection, stellar pulsations, magnetic fields, condensation of solid particles, and the formation of massive outflows that inject freshly produced heavy elements and dust particles into the interstellar med…
The GAPS Programme at TNG. XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems
Pagano, I.; Poretti, E.; Henning, Th. +34 more
Context. The measurement of the spin-orbit alignment of hot Jupiters, including a range of orbital and physical properties, can provide information about the evolution of the orbits of this special class of giant planets.
Aims: We aim to refine the orbital and physical parameters and determine the sky-projected planet orbital obliquity λ of f…