Search Publications
The mass of the young planet Beta Pictoris b through the astrometric motion of its host star
Snellen, I. A. G.; Brown, A. G. A.
The young massive Jupiters discovered with high-contrast imaging1-4 provide a unique opportunity to study the formation and early evolution of gas giant planets. A key question is to what extent gravitational energy from accreted gas contributes to the internal energy of a newly formed planet. This has led to a range of formation scenar…
Three-dimensional motions in the Sculptor dwarf galaxy as a glimpse of a new era
Massari, D.; Helmi, A.; Brown, A. G. A. +3 more
The three-dimensional motions of stars in small galaxies beyond our own are minute, yet they are crucial for understanding the nature of gravity and dark matter1,2. Even for the dwarf galaxy Sculptor—one of the best-studied systems, which is inferred to be strongly dark matter dominated3,4—there are conflicting reports5-…
The nature of the lithium enrichment in the most Li-rich giant star
Zhao, Gang; Gao, Qi; Yan, Hong-Liang +13 more
About 1% of giant stars1 have anomalously high Li abundances (ALi) in their atmospheres, conflicting directly with the prediction of standard stellar evolution models2. This finding makes the production and evolution of Li in the Universe intriguing, not only in the sense of Big Bang nucleosynthesis3,4 o…
Identification of the central compact object in the young supernova remnant 1E 0102.2-7219
Ruiter, Ashley J.; Dopita, Michael A.; Ghavamian, Parviz +4 more
Oxygen-rich young supernova remnants1 are valuable objects for probing the outcome of nucleosynthetic processes in massive stars, as well as the physics of supernova explosions. Observed within a few thousand years after the supernova explosion2, these systems contain fast-moving oxygen-rich and hydrogen-poor filaments visibl…