Lee Hartmann

TL;DR: In this article, it is shown that core structure and asymmetry will strongly favor post-collapse fragmentation into binary and multiple stellar systems, and that cores are more likely to have structures favoring high infall rates at early times, helping to explain the differences between Class 0 and Class I protostars.

TL;DR: In this article, the bolometric luminosities and temperatures for 330 Orion YSOs, 315 of which have bolometric temperatures characteristic of protostars, were analyzed using fits to the spectral energy distributions (SEDs).

TL;DR: In this article , the authors investigate whether triggering of the magnetorotational instability (MRI) in protoplanetary discs can account for the wide diversity of observed accretion outbursts, showing that short-lived, relatively low accretion rate events probably result from triggering in the inner disc and can occur at low surface densities, comparable to or smaller than the minimum mass solar nebula, and thus are very unlikely to result from MRI triggering by gravitational instability.

TL;DR: In this paper, the Spitzer IRS spectrum of CVSO 224, the sole transitional disk located within the ~10 Myr old 25 Orionis group in Orion OB1a, was analyzed and a model fit to the spectral energy distribution of this object indicates a 7 AU inner disk hole that contains a small amount of optically thin dust.