Search Publications
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…
First detection of AlF line emission towards M-type AGB stars
Fonfría, J. P.; Velilla-Prieto, L.; Wedemeyer, S. +3 more
The nucleosynthesis production of fluorine (F) is still a matter of debate. Asymptotic giant branch (AGB) stars are one of the main candidates for F production. However, their contribution to the total F budget is not fully known due to the lack of observations. In this paper, we report the detection of aluminium monofluoride (AlF) line emission, …
A deep 1.4 GHz survey of the J1030 equatorial field: A new window on radio source populations across cosmic time
Prandoni, I.; Massardi, M.; Vignali, C. +12 more
We present deep L-Band observations of the equatorial field centered on the z = 6.3 Sloan Digital Sky Survey (SDSS) quasar (QSO). This field is rich of multiwavelength photometry and spectroscopy data, making it an ideal laboratory for galaxy evolution studies. Our observations reach a 1σ sensitivity of ~2.5 µJy at the center of the field. We extr…
Ultracool dwarfs identified using spectra in LAMOST DR7
Luo, A. -Li; Li, Yin-Bi; Zhang, Shuo +7 more
In this work, we identify 734 ultracool dwarfs with a spectral type of M6 or later, including one L0. Of this sample, 625 were studied spectroscopically for the first time. All of these ultracool dwarfs are within 360 pc, with a Gaia G magnitude brighter than ∼19.2 mag. By studying the spectra and checking their stellar parameters (Teff…
Multiwavelength observations of Swift J0243.6+6124 from 2017 to 2022
Liu, Wei; Wang, Xiaofeng; Sai, Hanna +8 more
Context.Swift J0243.6+6124 is a high-mass X-ray binary that went into a giant X-ray outburst in 2017. During this event, the X-ray luminosity reached the highest value ever measured in a galactic Be/X-ray binary.
Aims: Our aim is to study the long-term variability of Swift J0243.6+6124 after the 2017 major X-ray outburst.
Methods: We hav…