Search Publications
Modeling the Mg I from the NUV to MIR. II. Testing stellar models
Peralta, J. I.; Vieytes, M. C.; Mendez, A. M. P. +1 more
Context. Reliable atomic data are mandatory ingredients to obtain a realistic semiempirical model of any stellar atmosphere. Due to their importance, we further improved our recently published Mg I atomic model.
Aims: We tested the new atomic model using atmospheric models of stars of different spectral types: the Sun (dG2), HD 22049 (dK2, Ep…
Long-term optical variability of the Be/X-ray binary GRO J2058+42
Blinov, D.; Reig, P.; Tzouvanou, A. +1 more
Context. GRO J2058+42 is a transient hard X-ray pulsar that occasionally goes into outburst. The optical counterpart is a poorly studied OB-type companion.
Aims: We investigate the long-term optical variability of the Be/X-ray binary GRO J2058+42 and the possible connection with periods of enhanced X-ray activity.
Methods: We performed a…
Two sub-Neptunes around the M dwarf TOI-1470
Tamura, M.; Amado, P. J.; Caballero, J. A. +50 more
Aims: A transiting planet candidate with a sub-Neptune radius orbiting the nearby (d = 51.9 ± 0.07 pc) M1.5 V star TOI-1470 with a period of ~2.5 d was announced by the NASA Transiting Exoplanet Survey Satellite (TESS), which observed the field of TOI-1470 in four different sectors. We aim to validate its planetary nature using precise radial…
Cluster aggregates surrounding Pismis 5 in the Vela molecular ridge
Hu, Qingshun; Zhang, Yu; Ma, Shuo +5 more
Context. In the Gaia era, the precision of astrometric data is unprecedented. High-quality data make it easier to find more cluster aggregates and gather further confirmation of these open clusters.
Aims: We use Gaia Data Release 3 (DR3) to redetermine the open clusters surrounding Pismis 5 in the Vela molecular ridge (VMR). We also investiga…
Very late-time spectroscopy of SN 2009ip: Constraints on the ongoing Hα emission
Prieto, Jose L.; Dessart, Luc; Pessi, Thallis
Context. The peculiar supernova (SN) 2009ip was an ambiguous event that placed many questions on its true origin. Here, we present very late-time spectroscopic and photometric observations of SN 2009ip, obtained 9 years (3274 days) after the 2012B outburst.
Aims: We analyze the Hα emission still present in the very late-time spectrum of SN 20…
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…