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Chronostar. II. Kinematic age and substructure of the Scorpius-Centaurus OB2 association
Maruša Žerjal, Michael J. Ireland, Timothy D. Crundall +2
The nearest region of massive star formation - the Scorpius-Centaurus OB2 association (Sco-Cen) - is a local laboratory ideally suited to the study of a wide range of astrophysical…
Establishing Oph as a Prototype Rotator: Precision Orbit with new Keck, CHARA, and RV Observations
Tyler Gardner, John D. Monnier, Francis C. Fekel +11
Alpha Ophiuchi (Rasalhague) is a nearby rapidly rotating A5IV star which has been imaged by infrared interferometry. Oph is also part of a known binary system, with a companion…
A spectroscopically confirmed Gaia-selected sample of 318 new young stars within 200 pc
Maruša Žerjal, Adam D. Rains, Michael J. Ireland +7
In the Gaia era, the majority of stars in the Solar neighbourhood have parallaxes and proper motions precisely determined while spectroscopic age indicators are still missing for a…
Mid-infrared photometry of the T Tauri triple system with kernel phase interferometry
J. Kammerer, M. Kasper, M. J. Ireland +11
T Tauri has long been the prototypical young pre-main-sequence star. However, it has now been decomposed into a triple system with a complex disk and outflow geometry. We aim to me…
ARMADA I: Triple Companions Detected in B-Type Binaries alpha Del and nu Gem
Tyler Gardner, John D. Monnier, Francis C. Fekel +19
Ground-based optical long-baseline interferometry has the power to measure the orbits of close binary systems at ~10 micro-arcsecond precision. This precision makes it possible to…
TOI 694 b and TIC 220568520 b: Two Low-Mass Companions Near the Hydrogen Burning Mass Limit Orbiting Sun-like Stars
Ismael Mireles, Avi Shporer, Nolan Grieves +40
We report the discovery of TOI 694 b and TIC 220568520 b, two low-mass stellar companions in eccentric orbits around metal-rich Sun-like stars, first detected by the Transiting Exo…