Search Publications
The XXL Survey. L. Active galactic nucleus contamination in galaxy clusters: Detection and cosmological impact
Valtchanov, Ivan; Vignali, Cristian; Aguena, Michel +12 more
Context. X-ray observations of galaxy clusters are impacted by the presence of active galactic nuclei (AGNs) in a manner that is challenging to quantify, leading to biases in the detection and measurement of cluster properties for both astrophysics and cosmological applications.
Aims: We detect and characterise clusters contaminated by centra…
FORECAST: A flexible software to forward model cosmological hydrodynamical simulations mimicking real observations
Santini, Paola; Castellano, Marco; Fontana, Adriano +7 more
Context. Comparing theoretical predictions to real data is crucial to properly formulate galaxy formation theories. However, this is usually done naively considering the direct output of simulations and quantities inferred from observations, which can lead to severe inconsistencies.
Aims: We present FORECAST, a new flexible and adaptable soft…
Binary masses and luminosities with Gaia DR3
Arenou, F.; Babusiaux, C.; Merle, T. +1 more
Context. The recent third data release (DR3) of Gaia has brought some new exciting data about stellar binaries. It provides new opportunities to fully characterize more stellar systems and contributes to enriching our global knowledge of stellar behaviour.
Aims: By combining the new Gaia non-single stars catalogue with double-lined spectrosco…
The GAPS programme at TNG. XLVI. Deep search for low-mass planets in late-dwarf systems hosting cold Jupiters
Pagano, I.; Poretti, E.; Rainer, M. +30 more
Context. With the growth of comparative exoplanetology, it is increasingly clear that the relationship between inner and outer planets plays a key role in unveiling the mechanisms governing formation and evolution models. For this reason, it is important to probe the inner region of systems hosting long-period giants in search of undetected lower …
Search for planets around stars with wide brown dwarfs
Béjar, V. J. S.; Zapatero Osorio, M. R.; Grundahl, F. +6 more
Aims: This work aims to better understand the role of wide brown dwarf companions in planetary systems.
Methods: We obtained high-resolution spectra of six bright stars with co-moving wide substellar companions with the high-resolution SONG, CARMENES, and STELLA spectrographs. We used these spectra to derive radial velocities together wi…
Reaching the boundary between stellar kinematic groups and very wide binaries. IV. The widest Washington Double Star systems with ρ ≥ 1000 arcsec in Gaia DR3
Caballero, J. A.; Cortés-Contreras, M.; González-Payo, J.
Aims: With the latest Gaia DR3 data, we analyse the widest pairs in the Washington Double Star (WDS) catalogue with angular separations, ρ, greater than 1000 arcsec.
Methods: We confirmed the pairs' membership to stellar systems based on common proper motions, parallaxes, and (when available) radial velocities, together with the locii of…
Another X-ray UFO without a momentum-boosted molecular outflow. ALMA CO(1-0) observations of the galaxy pair IRAS 05054+1718
Vignali, Cristian; Reeves, James N.; Dotti, Massimo +8 more
We present Atacama Large Millimetre/submillimetre Array (ALMA) CO(1-0) observations of the nearby infrared luminous (LIRG) galaxy pair IRAS 05054+1718 (also known as CGCG 468-002), as well as a new analysis of X-ray data of this source collected between 2012 and 2021 using the Nuclear Spectroscopic Telescope Array (NuSTAR), Swift, and the XMM-Newt…
Tracking magnetic flux and helicity from the Sun to Earth. Multi-spacecraft analysis of a magnetic cloud and its solar source
Temmer, M.; Veronig, A. M.; Dumbović, M. +5 more
Aims: We analyze the complete chain of effects - from the Sun to Earth - caused by a solar eruptive event in order to better understand the dynamic evolution of magnetic-field-related quantities in interplanetary space, in particular that of magnetic flux and helicity.
Methods: We study a series of connected events - a confined C4.5 flar…
Discovery and physical characterization as the first response to a potential asteroid collision: The case of 2023 DZ2
Licandro, J.; Alarcon, M. R.; Hudin, L. +15 more
Context. Near-Earth asteroids (NEAs) that may evolve into impactors deserve detailed threat assessment studies. Early physical characterization of a would-be impactor may help in optimizing impact mitigation plans. We first detected NEA 2023 DZ2 on 27 February 2023. After that, it was found to have a minimum orbit intersection distance …
Resolved Kennicutt-Schmidt law in two strongly lensed star-forming galaxies at redshift 1
Richard, Johan; Sun, Jiayi; Combes, Françoise +4 more
We study the star formation rate (SFR) vs. molecular gas mass (Mmol) scaling relation from hundreds to thousands of parsec in two strongly lensed galaxies at redshift z ∼ 1, the Cosmic Snake and A521. We trace the SFR using extinction-corrected rest-frame UV observations with the Hubble Space Telescope (HST), and Mmol using d…