Search Publications
Euclid preparation. XXVII. A UV-NIR spectral atlas of compact planetary nebulae for wavelength calibration
Altieri, B.; Cimatti, A.; Aghanim, N. +201 more
The Euclid mission will conduct an extragalactic survey over 15 000 deg2 of the extragalactic sky. The spectroscopic channel of the Near-Infrared Spectrometer and Photometer (NISP) has a resolution of R ~ 450 for its blue and red grisms that collectively cover the 0.93-1.89 µm range. NISP will obtain spectroscopic redshifts for 3 × 10
CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b
Alonso, R.; Deleuil, M.; Erikson, A. +75 more
Context. Ultra-short-period planets (USPs) are a unique class of super-Earths with an orbital period of less than a day, and hence they are subject to intense radiation from their host star. These planets cannot retain a primordial H/He atmosphere, and most of them are indeed consistent with being bare rocky cores. A few USPs, however, show eviden…
Constraints on (2060) Chiron's size, shape, and surrounding material from the November 2018 and September 2019 stellar occultations
Colas, F.; Sicardy, B.; Gomes-Júnior, A. R. +24 more
Context. After the discovery of rings around the largest known Centaur object, (10199) Chariklo, we carried out observation campaigns of stellar occultations produced by the second-largest known Centaur object, (2060) Chiron, to better characterize its physical properties and presence of material on its surroundings.
Aims: We aim to provide c…
TOI-179: A young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit
Marzari, F.; Girard, J.; Sozzetti, A. +29 more
Context. Transiting planets around young stars are key benchmarks for our understanding of planetary systems. One such candidate, TOI-179, was identified around the K dwarf HD 18599 by TESS.
Aims: We present the confirmation of the transiting planet and the characterization of the host star and of the TOI-179 system over a broad range of angu…
Phenomenological modelling of the Crab Nebula's broadband energy spectrum and its apparent extension
Horns, D.; Dirson, L.
Context. The Crab Nebula emits exceptionally bright non-thermal radiation across the entire wavelength range from the radio to the most energetic photons. So far, the underlying physical model of a relativistic wind from the pulsar terminating in a hydrodynamic standing shock has remained fairly unchanged since the early 1970s when it was first in…
Hot subdwarfs in close binaries observed from space. II. Analyses of the light variations
Geier, S.; Pelisoli, I.; Schaffenroth, V. +2 more
Context. Hot subdwarfs in close binaries with either M dwarf, brown dwarf, or white dwarf companions show unique light variations. In hot subdwarf binaries with M dwarf or brown dwarf companions, we can observe the so-called reflection effect, while in hot subdwarfs with close white dwarf companions, we find ellipsoidal modulation and/or Doppler b…
Black hole and galaxy co-evolution in radio-loud active galactic nuclei at z ∼ 0.3-4
Castignani, G.; Combes, F.; Poitevineau, R.
The relation between the mass of the supermassive black hole (SMBH) in the center of galaxies and their bulge mass or central velocity dispersion is well known. This suggests a coevolution between the SMBHs and their galaxy hosts. Our aim is to study this relation, specifically, for radio loud galaxies, and as a function of redshift z. We selected…
3D physico-chemical model of a pre-stellar core. I. Environmental and structural impact on the distribution of CH3OH and c-C3H2
Caselli, P.; Jensen, S. S.; Spezzano, S. +2 more
Context. Pre-stellar cores represent the earliest stage of the formation process of stars and planets. By characterizing the physical and chemical structure of these cores, we can establish the initial conditions for star and planet formation and determine to what degree the chemical composition of pre-stellar cores is inherited by the later stage…
The SOUL view of IRAS 20126+4104. Kinematics and variability of the H2 jet from a massive protostar
Sanna, A.; Leurini, S.; Esposito, S. +20 more
Context. We exploit the increased sensitivity of the recently installed adaptive optics SOUL at the LBT to obtain new high-spatial-resolution near-infrared images of the massive young stellar object IRAS20126+4104 and its outflow.
Aims: We aim to derive the jet proper motions and kinematics, as well as to study its photometric variability by …
Imaging-spectroscopy of a band-split type II solar radio burst with the Murchison Widefield Array
Gallagher, Peter T.; Carley, Eoin P.; Oberoi, Divya +1 more
Type II solar radio bursts are caused by magnetohydrodynamic (MHD) shocks driven by solar eruptive events such as coronal mass ejections (CMEs). Often, both fundamental and harmonic bands of type II bursts are split into sub-bands, which are generally believed to be coming from upstream and downstream regions of the shock; however, this explanatio…