Accretion through circumstellar disks plays an important role in star formation and in
establishing the properties of the regions in which planets form and migrate. The …

Context. Transition disks are protoplanetary disks with dust-depleted cavities, possibly
indicating substantial clearing of their dust content by a massive companion. For several …

Over the duration of the Kepler mission, KIC 8462852 was observed to undergo irregularly
shaped, aperiodic dips in flux of up to∼ 20 per cent. The dipping activity can last for …

AA Tau is the archetype for a class of stars with a peculiar periodic photometric variability
thought to be related to a warped inner disk structure with a nearly edge-on viewing …

EX Lup is the archetype for the class of young stars that undergoes repeated accretion
outbursts of∼ 5 mag at optical wavelengths that last for months. Despite extensive …

We present ten young (≲ 10 Myr) late-K and M dwarf stars observed in K2 Campaign 2 that
host protoplanetary disks and exhibit quasi-periodic or aperiodic dimming events. Their …

The K2 Mission has photometrically monitored thousands of stars at high precision and
cadence in a series of∼ 80-day campaigns focused on sections of the ecliptic plane. During …

The∼ 2 Myr old classical T Tauri star CI Tau shows periodic variability in its radial velocity
(RV) variations measured at infrared (IR) and optical wavelengths. We find that these …

We perform three-dimensional (3D) magnetohydrodynamic simulations of magnetospheric
accretion in a T Tauri star to study the accretion and wind structures in the close vicinity of …

Gaia21bty, a pre-main-sequence star that previously had shown aperiodic dips in its light
curve, underwent a considerable Δ G≈ 2.9 mag brightening that occurred over a few …