Search Publications
ZZ Ceti stars of the southern ecliptic hemisphere re-observed by TESS
Sódor, Ádám; Kawaler, Steven D.; Bognár, Zsófia +1 more
Context. In 2020, a publication presented the first-light results for 18 known ZZ Ceti stars observed by the TESS Space Telescope during the first survey observations of the southern ecliptic hemisphere. However, in the meantime, new measurements have become available from this field, in many cases with the new, 20 s ultrashort cadence mode.
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The ultraluminous X-ray source M 81 X-6: a weakly magnetised neutron star with a precessing accretion disc?
Godet, O.; Webb, N. A.; Middleton, M. J. +2 more
Context. Thanks to their proximity, ultraluminous X-ray sources (ULXs) represent a privileged astrophysical laboratory to study super-Eddington accretion. Current open questions concern the nature of the compact object, which is still hard to determine in those cases where pulsations are not directly detected, and the mechanisms responsible for th…
Comparison of dynamical and kinematic reference frames via pulsar positions from timing, Gaia, and interferometric astrometry
Liu, N.; Zhu, Z.; Liu, J. -C. +3 more
Context. Pulsars are special objects whose positions can be determined independently from timing, radio interferometric, and Gaia astrometry at sub-milliarcsecond (mas) precision; thus, they provide a unique way to monitor the link between dynamical and kinematic reference frames.
Aims: We aim to assess the orientation consistency between the…
Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS: TOI-615b, TOI-622b, and TOI-2641b
Smalley, Barry; Triaud, Amaury H. M. J.; Law, Nicholas M. +62 more
While the sample of confirmed exoplanets continues to grow, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of stellar masses and study the impact of high irradiation on hot Jupiters orbiting such stars. We report …
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Characterization of the young star T CrA and its circumstellar environment
Lodato, G.; Ménard, F.; Ginski, C. +15 more
Context. In recent years, a new hot topic has emerged in the star and planet formation field, namely, the interaction between the circumstellar disk and its birth cloud. The birth environments of young stars leave strong imprints on the star itself and their surroundings. In this context, we present a detailed analysis of the rich circumstellar en…
Effects of coronal mass ejection orientation on its propagation in the heliosphere
Temmer, M.; Vršnak, B.; Dumbović, M. +3 more
Context. In the scope of space weather forecasting, it is crucial to be able to more reliably predict the arrival time, speed, and magnetic field configuration of coronal mass ejections (CMEs). From the time a CME is launched, the dominant factor influencing all of the above is the interaction of the interplanetary CME (ICME) with the ambient plas…
Small-scale EUV features as the drivers of coronal upflows in the quiet Sun
Teriaca, Luca; Long, David M.; Schühle, Udo +18 more
Context. Coronal upflows in the quiet Sun are seen in a wide range of features, including jets and filament eruptions. The in situ measurements from Parker Solar Probe within ≈0.2 au have demonstrated that the solar wind is highly structured, showing abrupt and near-ubiquitous magnetic field reversals (i.e., switchbacks) on different timescales. T…
To grow old and peculiar: Survey of anomalous variable stars in M80 with age determinations using K2 and Gaia
Pál, András; Kinemuchi, Karen; Kollmeier, Juna A. +11 more
The globular cluster Messier 80 was monitored by the Kepler space telescope for 80 days during the K2 mission. Continuous, high-precision photometry of such an old, compact cluster allows us for studies of its variable star population in unprecedented detail. We used differential-image photometry to extract light curves for 27 variable stars A sea…
Asteroseismic modelling strategies in the PLATO era. I. Mean density inversions and direct treatment of the seismic information
Bétrisey, J.; Buldgen, G.; Reese, D. R. +6 more
Context. Asteroseismology experienced a breakthrough in the last two decades thanks to the so-called photometry revolution with space-based missions such as CoRoT, Kepler, and TESS. Because asteroseismic modelling will be part of the pipeline of the future PLATO mission, it is relevant to compare some of the current modelling strategies and discus…
A review of planetary systems around HD 99492, HD 147379, and HD 190007 with HARPS-N
Poretti, E.; Sozzetti, A.; Delisle, J. -B. +26 more
Context. The Rocky Planet Search (RPS) program is dedicated to a blind radial velocity (RV) search of planets around bright stars in the northern hemisphere, using the high-resolution echelle spectrograph HARPS-N installed on the Telescopio Nazionale Galileo (TNG).
Aims: The goal of this work is to revise and update the properties of three pl…