The age of an individual star cannot be measured, only estimated through mostly model-
dependent or empirical methods, and no single method works well for a broad range of …

BANYAN Σ is a new Bayesian algorithm to identify members of young stellar associations
within 150 pc of the Sun. It includes 27 young associations with ages in the range∼ 1–800 …

I review the current state of determinations of the Hubble constant, which gives the length
scale of the Universe by relating the expansion velocity of objects to their distance. There …

Context. The relevance of M dwarfs in the search for potentially habitable Earth-sized
planets has grown significantly in the last years. Aims. In our on-going effort to …

We present an updated release of the BaSTI (a Bag of Stellar Tracks and Isochrones) stellar
model and isochrone library for a solar-scaled heavy element distribution. The main input …

While the strong anticorrelation between chromospheric activity and age has led to the
common use of the Ca ii H and K emission index (R^{\prime} _ {\mathrm {HK}\,}= L …

A comprehensive census of the stellar content of the OB associations within 1 kpc from the
Sun is presented, based on Hipparcos positions, proper motions, and parallaxes. It is a key …

Modern astronomical research is beset with a vast range of statistical challenges, ranging
from reducing data from megadatasets to characterizing an amazing variety of variable …

K2 Rotation Periods for Low-mass Hyads and a Quantitative Comparison of the Distribution of
Slow Rotators in the Hyades and Praesepe - IOPscience This site uses cookies. By continuing …

Context. Understanding the origin and evolution of stellar angular momentum is one of the
major challenges of stellar physics. Aims. We present new models for the rotational …