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 …

Context. EX Lupi is the prototype by which EXor-type outbursts have been defined. It has
experienced multiple accretion-related bursts and outbursts throughout the past decades …

We investigate whether triggering of the magnetorotational instability (MRI) in protoplanetary
discs can account for the wide diversity of observed accretion outbursts. We show that short …

We present evidence in support of the hypothesis that the young stellar object RNO 54 is a
mature-stage FU Ori type source. The star was first cataloged as a" red nebulous object" in …

We study the evolution of the FU Ori object V960 Mon since its outburst, using available
multiwavelength photometric time series over 8 yr, complemented by several epochs of …

During the pre-main-sequence evolution, Young Stellar Objects (YSOs) assemble most of
their mass during the episodic accretion process. The rarely seen FUOr-type events are …

Accretion luminosity of young star FU Ori (FUOR) increased from undetectable levels to
hundreds of L⊙ in 1937 and remains nearly as high at the present time. In a recent paper …

During the pre-main-sequence (pre-MS) evolution stage of a star, significant amounts of
stellar mass are accreted during episodic accretion events, such as multidecade FUor-type …

ABSTRACT Mid-infrared (mid-IR) variability in young stellar objects (YSOs) is driven by
several physical mechanisms, which produce a variety of amplitudes and light-curve …

In the classical grouping of large magnitude episodic variability of young accreting stars, FU
Ori type objects (FUORs) outshine their stars by a factor of∼ 100, and can last for up to …