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V892 Tau: A tidally perturbed circumbinary disc in a triple stellar system
Ménard, François; Ribas, Álvaro; Macías, Enrique +8 more
Context. V892 Tau is a young binary star surrounded by a circumbinary disc that shows hints of an interaction with the low-mass nearby star V892 Tau NE.
Aims: The goal of this paper is to constrain the orbit of V892 Tau NE and to determine the resulting circumbinary disc dynamics.
Methods: We present new ALMA observations of the V892 Tau…
Acceleration and Release of Solar Energetic Particles Associated with a Coronal Shock on 2021 September 28 Observed by Four Spacecraft
Lugaz, Noé; Zhuang, Bin; Chrysaphi, Nicolina +5 more
The main driver of the acceleration of solar energetic particles (SEPs) is believed to be shocks driven by coronal mass ejections. Extreme-ultraviolet (EUV) waves are thought to be the propagating footprint of the shock on the solar surface. One of the key questions in SEP research is the timing of the SEP release with respect to the time when the…
On the identification of the first two young asteroid families in g-type non-linear secular resonances
Carruba, V.; Aljbaae, S.; Domingos, R. C. +10 more
Linear secular resonances happen when there is a commensurability between the precession frequency of the pericenter, g, or longitude of the node, s, of an asteroid and a planet. Non-linear resonances are higher order combinations of these frequencies. Here, we studied the three most diffusive g-type non-linear secular resonances using Artificial …
The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population
Noirot, Gaël; Brandt, William N.; Aird, James +32 more
We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80 month (NSS80) catalog has an unprecedented ∼62 Ms of effective exposure time over 894 unique fields (a factor of 3 increase over the 40 month catalog, NSS…
Accretion rates of 42 nova-like stars with IUE and Gaia data
Selvelli, Pierluigi; Gilmozzi, Roberto
We analyzed more than 700 ultraviolet spectra of 45 nova-like stars (NLs) observed with the International Ultraviolet Explorer (IUE) satellite, obtaining reliable data for 42 of them. Combining these with the distances from the Gaia Early Data Release 3 (EDR3) and with results from the literature, for each object we determined the reddening E…
Multiple power-law tails in the density and column-density distribution in contracting star-forming clumps
Klessen, Ralf S.; Veltchev, Todor V.; Donkov, Sava +3 more
We present a numerical study of the evolution of power-law tails (PLTs) in the (column-)density distributions (N-PDF, ρ-PDF) in contracting star-forming clumps in primordial gas, without and with some initial rotational and/or turbulent support. In all considered runs multiple PLTs emerge shortly after the formation of the first protostar. The fir…
Comprehensive Synthesis of Magnetic Tornado: Cospatial Incidence of Chromospheric Swirls and Extreme-ultraviolet Brightening
Yokoyama, Takaaki; Bose, Souvik; Kuniyoshi, Hidetaka
Magnetic tornadoes, characterized as impulsive Alfvén waves initiated by photospheric vortices in intergranular lanes, are considered efficient energy channels to the corona. Despite their acknowledged importance for solar coronal heating, their observational counterparts from the corona have not been well understood. To address this issue, we use…
Application of Convolutional Neural Networks to time domain astrophysics. 2D image analysis of OGLE light curves
Bayo, A.; Angeloni, R.; Monsalves, N. +4 more
In recent years the amount of publicly available astronomical data has increased exponentially, with a remarkable example being large-scale multiepoch photometric surveys. This wealth of data poses challenges to the classical methodologies commonly employed in the study of variable objects. As a response, deep learning techniques are increasingly …
Stellar Population Astrophysics (SPA) with TNG. Fluorine abundances in seven open clusters
Bragaglia, A.; Sanna, N.; D'Orazi, V. +9 more
Context. The age, evolution, and chemical properties of the Galactic disk can be effectively ascertained using open clusters. Within the large program Stellar Populations Astrophysics at the Telescopio Nazionale Galileo, we specifically focused on stars in open clusters, to investigate various astrophysical topics, from the chemical content of ver…
Simba-C: the evolution of the thermal and chemical properties in the intragroup medium
Hough, Renier T.; Shao, Zhiwei; Cui, Weiguang +5 more
The newly updated GIZMO and Simba based simulation, Simba-C, with its new stellar feedback, chemical enrichment, and recalibrated AGN feedback, allows for a detailed study of the intragroup medium X-ray properties. We discuss the impact of various physical mechanisms, e.g. stellar and AGN feedback, and chemical enrichment, on the composition and t…