Search Publications
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…
Temperature diagnostics of chromospheric fibrils
Oliver, R.; Kuridze, D.; Kriginsky, M.
Context. Chromospheric fibrils are thin and elongated structures that connect nearby photospheric magnetic field concentrations of opposite polarities.
Aims: We assess the possibilities and drawbacks related to the use of current instrumentation and inversion techniques to infer the thermodynamic structure of chromospheric fibrils.
Metho…
Mining archival data from wide-field astronomical surveys in search of near-Earth objects
Koschny, Detlef; Verdoes Kleijn, Gijs; Micheli, Marco +5 more
Context. Increasing our knowledge of the orbits and compositions of near-earth objects (NEOs) is important for a better understanding of the evolution of the Solar System and life. The detection of serendipitous NEO appearances among the millions of archived exposures from large astronomical imaging surveys can provide a contribution which is comp…
Finding the dispersing siblings of young open clusters. Dynamical traceback simulations using Gaia DR3
Prusti, T.; Hobbs, D.; McMillan, P. +1 more
Context. Stars tend to form in clusters, but many escape their birth clusters very early. Identifying the escaped members of clusters can inform us about the dissolution of star clusters, but also about the stellar dynamics in the galaxy. Methods capable of finding escaped stars from many clusters are required to fully exploit the large amounts of…
VPNEP: Detailed characterization of TESS targets around the Northern Ecliptic Pole. I. Survey design, pilot analysis, and initial data release
Strassmeier, K. G.; Weber, M.; Gruner, D. +13 more
Context. We embarked on a high-resolution optical spectroscopic survey of bright Transiting Exoplanet Survey Satellite (TESS) stars around the Northern Ecliptic Pole (NEP), dubbed the Vatican-Potsdam-NEP (VPNEP) survey.
Aims: Our NEP coverage comprises ≈770 square degrees with 1067 stars, of which 352 are bona fide dwarf stars and 715 are gia…
Constraints on the non-thermal desorption of methanol in the cold core LDN 429-C
Boogert, A. C. A.; Gratier, P.; Dartois, E. +6 more
Context. Cold cores are one of the first steps of star formation, characterized by densities of a few 104-105 cm−3, low temperatures (15 K and below), and very low external UV radiation. In these dense environments, a rich chemistry takes place on the surfaces of dust grains. Understanding the physico-chemical proc…