Search Publications
CORALIE radial velocity search for companions around evolved stars (CASCADES). II. Seismic masses for three red giants orbited by long-period massive planets
Buldgen, G.; Eggenberger, P.; Ségransan, D. +10 more
Context. The advent of asteroseismology as the golden path to precisely characterize single stars naturally led to synergies with the field of exoplanetology. Today, the precise determination of stellar masses, radii and ages for exoplanet-host stars is a driving force in the development of dedicated software and techniques to achieve this goal. H…
Hot magnetic halo of NGC 628 (M 74)
Ehle, M.; Weżgowiec, M.; Soida, M. +4 more
Context. In several spiral galaxies that are observed face-on, large-scale ordered magnetic fields (the so-called magnetic arms) were found. One of the explanations was the action of the magnetic reconnection, which leads to a higher ordering of the magnetic fields. Because it simultaneously converts the energy of the magnetic fields into thermal …
Towards a consistent model of the hot quadruple system HD 93206 = QZ Carinæ. I. Observations and their initial analyses
Wolf, M.; Chini, R.; Harmanec, P. +18 more
The hot nine-component system HD 93206, which contains a gravitationally bounded eclipsing Ac1+Ac2 binary (P = 5.9987 d) and a spectroscopic Aa1+Aa2 (P = 20.734 d) binary can provide important insights into the origin and evolution of massive stars. Using archival and new spectra, and a rich collection of ground-based and space photometric observa…
KIC 6951642: A confirmed Kepler γ Doradus - δ Scuti star with intermediate to fast rotation in a possible single-lined binary system
Gizon, L.; Lampens, P.; Samadi-Ghadim, A.
Context. KIC 6951642 has been reported as a candidate hybrid pulsator of type-γ Doradus - δ Scuti from observations of the first quarters of the Kepler mission. The regular patterns seen in the Fourier spectra of the Kepler and Transiting Exoplanet Survey Satellite TESS light curves and the sinusoidal modulation of its surface brightness suggest t…
J-PLUS: Discovery and characterisation of ultracool dwarfs using Virtual Observatory tools. II. Second data release and machine learning methodology
Hernández-Monteagudo, C.; Caballero, J. A.; Martín, E. L. +20 more
Context. Ultracool dwarfs (UCDs) comprise the lowest mass members of the stellar population and brown dwarfs, from M7 V to cooler objects with L, T, and Y spectral types. Most of them have been discovered using wide-field imaging surveys, for which the Virtual Observatory (VO) has proven to be of great utility.
Aims: We aim to perform a searc…
Ram pressure stripping in the z ∼ 0.5 galaxy cluster MS 0451.6-0305
Durret, F.; Ebeling, H.; Jauzac, M. +3 more
Context. The pressure exerted by the ambient hot X-ray gas on cluster galaxies can lead to the presence of ram pressure stripped (RPS) galaxies, characterized by asymmetric shapes, and, in some cases, tails of blue stars and/or X-ray gas, with increased star formation.
Aims: With the aim of increasing the known sample of RPS galaxies at redsh…
Detection of an unidentified soft X-ray emission feature in NGC 5548
Gu, Liyi; Ward, Martin; Mehdipour, Missagh +17 more
Context. NGC 5548 is an X-ray bright Seyfert 1 active galaxy. It exhibits a variety of spectroscopic features in the soft X-ray band, in particular including the absorption by the active galactic nucleus (AGN) outflows of a broad range of ionization states, with column densities up to 1027 m−2, and having speeds up to several…
Discrete Element Modeling of Aeolian-like Morphologies on Comet 67P/Churyumov-Gerasimenko
Otto, K. A.; Sachse, M.; Kappel, D. +1 more
Context. Even after the Rosetta mission, some of the mechanical parameters of comet 67P/Churyumov-Gerasimenko's surface material are still not well constrained. They are needed to improve our understanding of cometary activity or for planning sample return procedures.
Aims: We discuss the physical process dominating the formation of aeolian-l…
Solid confirmation of the broad DIB around 864.8 nm using stacked Gaia-RVS spectra
Schultheis, M.; Marshall, D. J.; Smith, M. +26 more
Context. Studies of the correlation between different diffuse interstellar bands (DIBs) are important for exploring their origins. However, the Gaia-RVS spectral window between 846 and 870 nm contains few DIBs, the strong DIB at 862 nm being the only convincingly confirmed one.
Aims: Here we attempt to confirm the existence of a broad DIB aro…
The complex dynamical past and future of double eclipsing binary CzeV343: Misaligned orbits and period resonance
Prieto, Jose L.; Fausnaugh, Michael M.; De Rosa, Gisella +5 more
CzeV343 (=V849 Aur) was previously identified as a candidate double eclipsing binary (2+2 quadruple), where the orbital periods of the two eclipsing binaries (PA ≈ 1.2 days and PB ≈ 0.8 days) lie very close to a 3:2 resonance. Here, we analyze 11 yr of ground-based photometry, four sectors of Transiting Exoplanet Survey Satel…