Search Publications
Characterization of Kepler targets based on medium-resolution LAMOST spectra analyzed with ROTFIT
De Cat, P.; Frasca, A.; Wang, J. X. +7 more
Aims: In this work we present the results of our analysis of 16 300 medium-resolution LAMOST spectra of late-type stars in the Kepler field with the aim of determining the stellar parameters, activity level, lithium atmospheric content, and binarity.
Methods: We have used a version of the code ROTFIT specifically developed for the LAMOST…
On the dynamical evolution of Cepheids in star clusters
Anderson, Richard I.; Kroupa, Pavel; Dinnbier, František
We investigated the occurrence of classical (type-I) Cepheid variable stars (henceforth Cepheids) in dynamically evolving star clusters from birth to an age of approximately 300 Myr. The clusters are modelled by the Aarseth code NBODY6, and they feature a realistic stellar initial mass function and initial binary star population, single star and b…
Automatic detection of small-scale EUV brightenings observed by the Solar Orbiter/EUI
Barczynski, K.; Chitta, L. P.; Zhukov, A. N. +23 more
Context. Accurate detections of frequent small-scale extreme ultraviolet (EUV) brightenings are essential to the investigation of the physical processes heating the corona.
Aims: We detected small-scale brightenings, termed campfires, using their morphological and intensity structures as observed in coronal EUV imaging observations for statis…
The APEX Large CO Heterodyne Orion Legacy Survey (ALCOHOLS). I. Survey overview
Smith, M. D.; Eislöffel, J.; Williams, J. P. +29 more
Context. The Orion molecular cloud complex harbours the nearest Giant Molecular Clouds (GMCs) and the nearest site of high-mass star formation. Its young star and protostar populations are thoroughly characterized. The region is therefore a prime target for the study of star formation.
Aims: Here, we verify the performance of the SuperCAM 64 …
A warm super-Neptune around the G-dwarf star TOI-1710 revealed with TESS, SOPHIE, and HARPS-N
Deleuil, M.; Moutou, C.; Carmona, A. +50 more
We report the discovery and characterization of the transiting extrasolar planet TOI-1710 b. It was first identified as a promising candidate by the Transiting Exoplanet Survey Satellite. Its planetary nature was then established with SOPHIE and HARPS-N spectroscopic observations via the radial-velocity method. The stellar parameters for the host …
Exploring X-ray variability with unsupervised machine learning. I. Self-organizing maps applied to XMM-Newton data
Salvaterra, R.; Belfiore, A.; Marelli, M. +3 more
Context. XMM-Newton provides unprecedented insight into the X-ray Universe, recording variability information for hundreds of thousands of sources. Manually searching for interesting patterns in light curves is impractical, requiring an automated data-mining approach for the characterization of sources.
Aims: Straightforward fitting of tempor…
Spatially resolved mass-metallicity relation at z ∼ 0.26 from the MUSE-Wide Survey
Lin, Zesen; Chen, Guangwen; Kong, Xu +5 more
Aims: Galaxies in the local universe have a spatially resolved star-forming main sequence (rSFMS) and mass-metallicity relation (rMZR). We know that the global mass-metallicity relation (MZR) results from the integral of the rMZR, and it evolves with redshift. However, the evolution of the rMZR with redshift is still unclear because the spati…
Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40
Kuzuhara, M.; Tamura, M.; Kudo, T. +45 more
Context. Despite being a prominent subset of the exoplanet population discovered in the past three decades, the nature and provenance of sub-Neptune-sized planets is still one of the open questions in exoplanet science.
Aims: For planets orbiting bright stars, precisely measuring the orbital and planet parameters of the system is the best app…
Physical properties of more than one thousand brightest cluster galaxies detected in the Canada-France-Hawaii Telescope Legacy Survey
Durret, F.; Márquez, I.; Sarron, F. +1 more
Context. Brightest cluster galaxies (BCGs) are very massive elliptical galaxies found at the centres of clusters. Their study gives clues to the formation and evolution of the clusters in which they are embedded.
Aims: We analyse here in a homogeneous way the properties of a sample of more than 1000 BCGs in the redshift range 0.15 < z <…
HD 20329b: An ultra-short-period planet around a solar-type star found by TESS
Pallé, E.; Dai, F.; Gandolfi, D. +45 more
Context. Ultra-short-period (USP) planets are defined as planets with orbital periods shorter than one day. This type of planets is rare, highly irradiated, and interesting because their formation history is unknown.
Aims: We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Tra…