Search Publications
CHEX-MATE: A non-parametric deep learning technique to deproject and deconvolve galaxy cluster X-ray temperature profiles
Arnaud, M.; Pointecouteau, E.; Pratt, G. W. +21 more
Temperature profiles of the hot galaxy cluster intracluster medium (ICM) have a complex non-linear structure that traditional parametric modelling may fail to fully approximate. For this study, we made use of neural networks, for the first time, to construct a data-driven non-parametric model of ICM temperature profiles. A new deconvolution algori…
Planetary companions orbiting the M dwarfs GJ 724 and GJ 3988. A CARMENES and IRD collaboration
Kuzuhara, M.; Tamura, M.; Kudo, T. +36 more
We report the discovery of two exoplanets around the M dwarfs GJ 724 and GJ 3988 using the radial velocity (RV) method. We obtained a total of 153 3.5 m Calar Alto/CARMENES spectra for both targets and measured their RVs and activity indicators. We also added archival ESO/HARPS data for GJ 724 and infrared RV measurements from Subaru/IRD for GJ 39…
The Neptunian gravity estimated from the motion of Triton based on astrometric observations
Yuan, Ye; Yan, Jianguo; Wang, Bo +4 more
Context. Accurate gravity and ephemerides estimations for Neptune and its satellites are necessary for the forthcoming deep space exploration missions targeting its system. In addition, these estimations are also meaningful for the modeling of Neptune's interior and for solar system dynamics studies. The body of astrometric data concerning Triton …
Compositional properties of planet-crossing asteroids from astronomical surveys
Lazzarin, M.; Carry, B.; La Forgia, F. +8 more
Context. The study of planet-crossing asteroids is of both practical and fundamental importance. As they are closer than asteroids in the Main Belt, we have access to a smaller size range, and this population frequently impacts planetary surfaces and can pose a threat to life.
Aims: We aim to characterize the compositions of a large corpus of…
Forgotten treasures in the HST/FOC UV imaging polarimetric archives of active galactic nuclei. I. Pipeline and benchmarking against NGC 1068 and exploring IC 5063
Kishimoto, M.; Lopez-Rodriguez, E.; Marin, F. +2 more
Context. Over its 13 yr of operation (1990-2002), the Faint Object Camera (FOC) on board the Hubble Space Telescope (HST) observed 26 individual active galactic nuclei (AGNs) in ultraviolet (UV) imaging polarimetry. However, not all of the observations have been reduced and analyzed or set within a standardized framework.
Aims: We plan to red…
Discovery of a massive giant planet with extreme density around the sub-giant star TOI-4603
Bieryla, Allyson; Latham, David W.; Ciardi, David R. +11 more
We present the discovery of a transiting massive giant planet around TOI-4603, a sub-giant F-type star from NASA's Transiting Exoplanet Survey Satellite (TESS). The newly discovered planet has a radius of 1.042−0.035+0.038 RJ and an orbital period of 7.24599−0.00021+0.00022 days. Using radial …
The MUSE-Faint survey. III. Constraining scalar field dark matter with Antlia B
Bouché, Nicolas; Boogaard, Leindert A.; Brinchmann, Jarle +7 more
Aims: We use the stellar line-of-sight velocities of Antlia B (Ant B), a faint dwarf galaxy in the NGC 3109 association, to derive constraints on the fundamental properties of scalar field dark matter (SFDM), which was originally proposed to solve the small-scale problems faced by cold dark matter models.
Methods: We used the first spect…
Statistics of Magrathea exoplanets beyond the main sequence. Simulating the long-term evolution of circumbinary giant planets with TRES
Columba, G.; Toonen, S.; Danielski, C. +2 more
Context. Notwithstanding the tremendous growth of the field of exoplanets in the last decade, limited attention has been paid to the planets around binary stars, which represent a small fraction of the total discoveries to date. Circumbinary planets (CBPs) have been discovered primarily with transit and eclipse timing variation methods, mainly aro…
Spectropolarimetric investigation of magnetohydrodynamic wave modes in the photosphere: First results from PHI on board Solar Orbiter
Woch, J.; Solanki, S. K.; Schou, J. +31 more
Context. In November 2021, Solar Orbiter started its nominal mission phase. The remote-sensing instruments on board the spacecraft acquired scientific data during three observing windows surrounding the perihelion of the first orbit of this phase.
Aims: The aim of the analysis is the detection of magnetohydrodynamic (MHD) wave modes in an act…
X-ray flashes from the low-mass X-ray binary IGR J17407−2808
Santangelo, A.; Ducci, L.; Romano, P. +4 more
IGR J17407−2808 is an enigmatic and poorly studied X-ray binary that was recently observed quasi-simultaneously with NuSTAR and XMM-Newton. In this paper we report the results of this observational campaign. During the first 60 ks of observation, the source was caught in a relatively low emission state characterised by a modest variability and an …