Search Publications
Planetary nebulae of the Large Magellanic Cloud. I. A multiwavelength analysis
Bianchi, S.; Dell'Agli, F.; Ventura, P. +5 more
Context. Planetary nebulae (PNe) have three main components: a central star (CS), ionized gas, and dust in the nebula. Each contains critical chemical fingerprints of the PN's evolution, which serve as tracers of the evolution, nucleosynthesis, and dust production that occurred during the preceding asymptotic giant branch (AGB) phase.
Aims: W…
Impact of radial interplanetary magnetic fields on the inner coma of comet 67P/Churyumov-Gerasimenko. Hybrid simulations of the plasma environment
Goetz, Charlotte; Gunell, Herbert; Fatemi, Shahab
Context. The direction of the interplanetary magnetic field determines the nature of the interaction between a Solar System object and the solar wind. For comets, it affects the formation of both a bow shock and other plasma boundaries, as well as mass-loading. Around the nucleus of a comet, there is a diamagnetic cavity, where the magnetic field …
Two shell- and wing-shaped supernova remnants. Investigating the molecular environments around VRO 42.05.01 and G 350.0-2.0
Vink, Jacco; Domček, Vladimir; Zhou, Ping +6 more
Supernova remnants (SNRs) are profoundly affected by their ambient medium. In particular, SNRs with a mixed morphology (characterised by a shell-like radio morphology and centrally filled X-ray emission) are thought to be the result of the interaction of a supernova explosion with a dense environment. In this work, we present carbon monoxide (CO) …
Ancient stellar populations in the outskirts of nearby grand-design spirals: Investigation of their star formation histories
Bisigello, Laura; Renzini, Alvio; Rodighiero, Giulia +7 more
Context. The main sequence (MS) of star-forming galaxies (SFGs) is the tight relation between the galaxy stellar mass (M⋆) and its star formation rate (SFR) and was observed up to z ∼ 6. The MS relation can be used as a reference for understanding the differences among galaxies, which are characterised by different rates of stellar prod…
Curves of growth for transiting exocomets: Application to Fe II lines in the β Pictoris system
Lecavelier des Etangs, A.; Vidal-Madjar, A.; Vrignaud, T. +4 more
Using transit spectroscopy, exocomets are routinely observed in the young planetary system of β Pic. However, despite more than 35 yr of observations, we still have very little information on the physical properties and almost no information on the abundances of the gaseous clouds surrounding the comets' nuclei, the difficulty being the conversion…
An in-depth analysis of the variable cyclotron lines in GX 301−2
Fürst, Felix; Kretschmar, Peter; Pottschmidt, Katja +13 more
Context. The high-mass X-ray binary system GX 301−2 is a persistent source with a well-known variable cyclotron line centered at 35 keV. Recently, a second cyclotron line at 50 keV has been reported with a presumably different behavior than the 35 keV line.
Aims: We investigate the presence of the newly discovered cyclotron line in the phase-…
Galaxies in the zone of avoidance: Misclassifications using machine learning tools
Minniti, D.; Masetti, N.; Soto, M. +10 more
Context. Automated methods for classifying extragalactic objects in large surveys offer significant advantages compared to manual approaches in terms of efficiency and consistency. However, the existence of the Galactic disk raises additional concerns. These regions are known for high levels of interstellar extinction, star crowding, and limited d…
Multi-kilogauss magnetic field driving the magnetospheric accretion process in EX Lupi
Audard, M.; Kóspál, Á.; Lavail, A. +1 more
Context. EX Lupi is the prototype of EX Lup-type stars, which are classical T Tauri stars (cTTSs) with luminosity bursts and outbursts of 1–5 magnitudes that last for a few months to a few years. These events are ascribed to an episodic accretion that can occur repeatedly, but whose physical mechanism is still debated. Aims. We aim to investigate …
A determination of the Large Magellanic Cloud dark matter subhalo mass using the Milky Way halo stars in its gravitational wake
Fushimi, K. J.; Mosquera, M. E.; Dominguez, M.
Aims: Our goal is to study the gravitational effects caused by the passage of the Large Magellanic Cloud (LMC) in its orbit on the stellar halo of the Milky Way.
Methods: We employed Gaia Data Release 3 to construct a halo tracers dataset consisting of K-giant stars and RR-Lyrae variables. Additionally, we compared the data with a theore…
The impact of stellar bars on star-formation quenching: Insights from a spatially resolved analysis in the local Universe
Bisigello, Laura; Gruppioni, Carlotta; Rodighiero, Giulia +8 more
Context. Stellar bars are common morphological structures in the local Universe; according to optical and NIR surveys, they are present in about two-thirds of disc galaxies. These elongated structures are also believed to play a crucial role in secular evolutionary processes, because they are able to efficiently redistribute gas, stars, and angula…