Search Publications
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 …
The truncation of the disk of NGC 4565. Detected up to z = 4 kpc, with star formation, and affected by the warp
Trujillo, Ignacio; Borlaff, Alejandro S.; Comerón, Sébastien +5 more
Context. The hierarchical model of galaxy formation suggests that galaxies are continuously growing. However, our position inside the Milky Way prevents us from studying the disk edge. Truncations are low surface brightness features located in the disk outskirts of external galaxies. They indicate where the disk brightness abruptly drops, and thei…
A rotational age for the open cluster NGC 2281. The possibility of using the fast rotator sequence for accurate cluster age determinations
Strassmeier, K. G.; Granzer, T.; Barnes, S. A. +3 more
Context. Cool star rotation periods have become an important tool in determining ages of open clusters.
Aims: We aim to estimate the age of the open cluster NGC 2281 based on the rotational properties of its low-mass members. Previous age estimates for this open cluster range from 275 Myr to 630 Myr.
Methods: Based on an eight month-long…
Radio multiwavelength analysis of the compact disk CX Tau: Presence of strong free-free variability or anomalous microwave emission
Lodato, G.; Testi, L.; Tazzari, M. +8 more
Protoplanetary disks emit radiation across a broad range of wavelengths, requiring a multiwavelength approach to fully understand their physical mechanisms and how they form planets. Observations at submillimeter to centimeter wavelengths can provide insights into the thermal emission from dust, free-free emission from ionized gas, and possible gy…
The multichord stellar occultation by the centaur Bienor on January 11, 2019
Colas, F.; Mottola, S.; Souami, D. +42 more
Within our program of physical characterization of trans-Neptunian objects and centaurs, we predicted a stellar occultation by the centaur (54598) Bienor to occur on January 11, 2019, with good observability potential. We obtained high accuracy astrometric data to refine the prediction, resulting in a shadow path favorable for the Iberian Peninsul…
Dynamical state of the globular clusters Rup 106 and IC 4499
Dalessandro, E.; Beccari, G.; Cadelano, M.
The dynamical evolution of globular clusters is theoretically described by a series of well-known events typical of N-body systems. Still, the identification of observational signatures able to empirically describe the stage of dynamical evolution of a stellar system with a density typical of a globular cluster represents a challenge. In this pape…