Search Publications
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…
The unaltered pulsar: GRO J1750-27, a supercritical X-ray neutron star that does not blink an eye
Altamirano, D.; Sanna, A.; Ducci, L. +11 more
When accreting X-ray pulsars (XRPs) undergo bright X-ray outbursts, their luminosity-dependent spectral and timing features can be analyzed in detail. The XRP GRO J1750-27 recently underwent one such episode, during which it was observed with NuSTAR and monitored with NICER. Such a data set is rarely available, as it samples the outburst over more…
A high-latitude coronal mass ejection observed by a constellation of coronagraphs: Solar Orbiter/Metis, STEREO-A/COR2, and SOHO/LASCO
Perri, S.; Sasso, C.; Romoli, M. +35 more
Context. A few days before the first perihelion of the Solar Orbiter nominal mission, which occurred on 2022 March 26, the Metis coronagraph on board Solar Orbiter detected a coronal mass ejection (CME) that was moving away from the far side of the Sun (with respect to Solar Orbiter) at high northern latitudes. The eruption was also seen by other …
C I and CO in nearby spiral galaxies. I. Line ratio and abundance variations at ∼200 pc scales
Kruijssen, J. M. Diederik; Rosolowsky, Erik; Chevance, Mélanie +25 more
We present new neutral atomic carbon [C I] (3P1 → 3P0) mapping observations within the inner ∼7 kpc and ∼4 kpc of the disks of NGC 3627 and NGC 4321 at a spatial resolution of 190 pc and 270 pc, respectively, using the Atacama Large Millimeter/Submillimeter Array (ALMA) Atacama Compact Array (ACA). We co…
UOCS. X. Rich collection of post-mass-transfer systems in NGC 6791
Jadhav, Vikrant V.; Subramaniam, Annapurni; Sagar, Ram
Aims: NGC 6791 is one of the richest old open clusters in the Milky Way. Its position above the Galactic plane and its number density make it an interesting middle ground between Galactic open and globular clusters. We aim to detect the UV-bright population of NGC 6791 using AstroSat/UVIT images in near-UV and far-UV filters and characterise …
Star-disk interactions in the strongly accreting T Tauri star S CrA N
Dougados, C.; Bouvier, J.; Alencar, S. H. P. +11 more
Context. Classical T Tauri stars are thought to accrete material from their surrounding protoplanetary disks through funnel flows along their magnetic field lines. The classical T Tauri stars with high accretion rates (∼10−7 M⊙ yr−1) are ideal targets for testing this magnetospheric accretion scenario in a sustaine…