Search Publications
Brown dwarfs as ideal candidates for detecting UV aurora outside the Solar System: Hubble Space Telescope observations of 2MASS J1237+6526
Saur, Joachim; Youngblood, Allison; Roth, Lorenz +5 more
Context. Observations of auroral emissions are powerful means to remotely sense the space plasma environment around planetary bodies and ultracool dwarfs. Therefore successful searches and characterization of aurorae outside the Solar System will open new avenues in the area of extrasolar space physics.
Aims: We aim to demonstrate that brown …
Resolving the dynamical mass tension of the massive binary 9 Sagittarii
Sana, H.; Hawcroft, C.; Mahy, L. +4 more
Context. Direct dynamical mass measurements of stars with masses above 30 M⊙ are rare. This is the result of the low yield of the upper initial mass function and the limited number of such systems in eclipsing binaries. Long-period, double-lined spectroscopic binaries that are also resolved astrometrically offer an alternative to eclips…
Magnetic reconnection as a mechanism to produce multiple thermal proton populations and beams locally in the solar wind
André, N.; Fedorov, A.; Livi, S. +37 more
Context. Spacecraft data revealed early on the frequent observation of multiple near-thermal proton populations in the solar wind. Decades of research on their origin have focused on processes such as magnetic reconnection in the low corona and wave-particle interactions in the corona and locally in the solar wind.
Aims: This study aims to hi…
NGC 1261: An r-process enhanced globular cluster from the Gaia-Enceladus event
McWilliam, Andrew; Koch-Hansen, Andreas J.; Hansen, Camilla J.
Our Milky Way (MW) has witnessed a series of major accretion events in the past. One of the later additions, the Gaia-Enceladus merger, has contributed a considerable mass to the inner Galaxy, but also generously donated to the outer halo. So far, associations with present-day MW globular clusters (GCs) have been chiefly based on their kinematics …
A revised cone model and its application to non-radial prominence eruptions
Zhang, Q. M.
Context. The traditional cone models achieve great success in studying the geometrical and kinematic properties of halo coronal mass ejections (CMEs).
Aims: In this Letter, a revised cone model is proposed to investigate the properties of CMEs as a result of non-radial prominence eruptions.
Methods: The cone apex is located at the source…
Decoding the morphological evolution of open clusters
Hu, Qingshun; Zhang, Yu; Esamdin, Ali
Context. The properties of open clusters such as metallicity, age, and morphology are useful tools in studies of the dynamic evolution of open clusters. The morphology of open clusters can help us better understand the evolution of such structures.
Aims: We aim to analyze the morphological evolution of 1256 open clusters by combining the shap…
χ1 Fornacis cluster DANCe. Census of stars, structure, and kinematics of the cluster with Gaia-EDR3
Miret-Roig, N.; Bouy, H.; Sarro, L. M. +4 more
Context. The χ1 Fornacis cluster (Alessi 13) is one of a few open clusters of its age and distance in the Solar neighbourhood that ought to benefit from more attention as it can serve as a cornerstone for numerous future studies related to star and planet formation.
Aims: We take advantage of the early installment of the third data…
Molecular cloud catalogue from 13CO (1-0) data of the Forgotten Quadrant Survey
Rygl, K. L. J.; Testi, L.; Benedettini, M. +13 more
Context. New-generation spectroscopic surveys of the Milky Way plane have been revealing the structure of the interstellar medium, allowing the simultaneous study of dense structures from single star-forming objects or systems to entire spiral arms.
Aims: The good sensitivity of the new surveys and the development of dedicated algorithms now …
The kinematics of Small Magellanic Cloud star clusters
Piatti, Andrés E.
We report results of the proper motions of 25 known Small Magellanic Cloud (SMC) clusters (ages ∼ 1-10 Gyr old) derived from Gaia EDR3 data sets. When these mean proper motions were gathered with existent radial velocity measurements to compose the clusters' velocity vectors, we found the parameter values of a rotation disk that best resemble thei…
The SOPHIE search for northern extrasolar planets. XVII. A wealth of new objects: Six cool Jupiters, three brown dwarfs, and 16 low-mass binary stars
Bouchy, F.; Deleuil, M.; Moutou, C. +30 more
Distinguishing classes within substellar objects and understanding their formation and evolution need larger samples of substellar companions such as exoplanets, brown dwarfs, and low-mass stars. In this paper, we look for substellar companions using radial velocity surveys of FGK stars with the SOPHIE spectrograph at the Observatoire de Haute-Pro…