The phenomenon of quasi-periodic pulsations (QPPs) in solar and stellar flares has been
known for over 50 years and significant progress has been made in this research area. It has …

Context. The Taurus Molecular Cloud (TMC) is the nearest large star-forming region,
prototypical for the distributed mode of low-mass star formation. Pre-main sequence stars …

Aim. We have investigated the gas organization within the paradigmatic Integral Shape
Filament (ISF) in Orion in order to decipher whether or not all filaments are bundles of fibers …

We have used the Very Long Baseline Array to measure the trigonometric parallax of
several member stars of the Orion Nebula Cluster showing non-thermal radio emission. We …

This is the first in a series of papers in which we describe and report the analysis of a large
survey of Herbig Ae/Be stars in circular spectropolarimetry. Using the ESPaDOnS and …

We present a global study of low-mass, young stellar object (YSO) surface densities (Σ) in
nearby (< 500 pc) star-forming regions based on a comprehensive collection of Spitzer …

Abstract The Chandra Orion Ultradeep Project (COUP) provides the most comprehensive
data set ever acquired on the X-ray emission of pre-main-sequence stars. In this paper, we …

Young solar-type stars are known to be strong X-ray emitters and their X-ray spectra have
been widely studied. X-rays from the central star may play a crucial role in the …

We present the time evolution of viscously accreting circumstellar disks as they are
irradiated by ultraviolet and X-ray photons from a low-mass central star. Our model is a …

Cosmic rays (CRs) are thought to provide an important source of ionization in the outermost
and densest regions of protoplanetary disks; however, it is unknown to what degree they are …