Search Publications
AXES-2MRS: A new all-sky catalogue of extended X-ray galaxy groups
Finoguenov, A.; Tempel, E.; Mamon, G. A. +1 more
Context. Understanding baryonic physics at the galaxy-group level is a prerequisite for cosmological studies of the large-scale structure. One poorly understood aspect of galaxy groups is related to the properties of their hot intragroup medium. The well-studied X-ray groups have strong cool cores by which they were selected, so expanding the sele…
The CARMENES search for exoplanets around M dwarfs: Magnesium and silicon abundances of K7–M5.5 stars
Amado, P. J.; Caballero, J. A.; Reiners, A. +13 more
We present the abundances of magnesium (Mg) and silicon (Si) for 314 dwarf stars with spectral types in the interval K7.0–M5.5 (Teff range ≈ 4200–3050 K) observed with the CARMENES high-resolution spectrograph at the 3.5 m telescope at the Calar Alto Observatory. Our analysis employs the BT-Settl model atmospheres, the radiative transfe…
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 …