We derive the distance and structure of the Perseus molecular cloud by combining
trigonometric parallaxes from Very Long Baseline Array (VLBA) observations, taken as part …

Zeeman–Doppler imaging studies have shown that the magnetic fields of T Tauri stars can
be significantly more complex than a simple dipole and can vary markedly between sources …

Over two years, 8859 high-resolution H-band spectra of 3493 young (1–10 Myr) stars were
gathered by the multi-object spectrograph of the APOGEE project as part of the IN-SYNC …

ABSTRACT A major impediment to understanding star formation in massive star-forming
regions (MSFRs) is the absence of a reliable stellar chronometer to unravel their complex …

Measuring the evolution of X-ray emission from pre-main-sequence (PMS) stars gives
insight into two issues: the response of magnetic dynamo processes to changes in the …

We study the four-dimensional relationships between magnetic activity, rotation, mass, and
age for solar-type stars in the age range 5–25 Myr. This is the late-pre-main-sequence (l …

We investigate stellar magnetic activity from the theoretical point of view, by using stellar
evolution models to calculate theoretical convective turnover times (τc) and Rossby numbers …

X-ray observations of low-mass stars in open clusters are critical to understanding the
dependence of magnetic activity on stellar properties and their evolution. Praesepe and the …

Context. Several studies showed that the magnetic activity of late-type main-sequence (MS)
stars is characterized by different regimes and that their activity levels are well described by …

High-energy radiation from a planet host star can have strong influence on the final
habitability of a system through several mechanisms. In this context we have constructed a …