▪ Abstract Observational studies of low-mass stars during their early stages of evolution, from
protostars through the zero-age main sequence, show highly elevated levels of magnetic …

Many types of stars have strong magnetic fields that can dynamically influence the flow of
circumstellar matter. In stars with accretion disks, the stellar magnetic field can truncate the …

Aims. We investigate the evolution of protoplanetary discs (PPDs) with magnetically driven
disc winds and viscous heating. Methods. We considered an initially massive disc with~ 0.1 …

Aims. We examine whether ejection phenomena from accreting T Tauri stars can be
described by only one type of self-collimated jet model. Methods. We present analytical …

We present a study of accretion in a sample of 45 young, low-mass objects in a variety of
star-forming regions and young associations, about half of which are likely substellar. Based …

The inner 0.1 AU around accreting T Tauri stars hold clues to many physical processes that
characterize the early evolution of solar-type stars. The accretion-ejection connection takes …

We review recent observational and theoretical results on the relationship between
circumstellar accretion disks and jets in young stellar objects. We then present a theoretical …

We investigate the launching of outflows from the disc–magnetosphere boundary of slowly
and rapidly rotating magnetized stars using axisymmetric and exploratory 3D …

We present results of fully three-dimensional MHD simulations of disk accretion to a slowly
rotating magnetized star with its dipole moment inclined at an angle Θ to the rotation axis of …

In a high-dispersion 1 μm survey of 39 classical T Tauri stars (CTTSs) veiling is detected in
80% of the stars, and He I λ10830 and Pγ line emission in 97%. On average, the 1 μm …