Lee Hartmann

TL;DR: In this paper, a two-dimensional, two-fluid hydrodynamic calculations were carried out to find that a planetary-mass companion located at the outer disk of SAO 206462 could be responsible for these observed structures.

TL;DR: In this article, the authors have computed smoothed particle hydrodynamics simulations of the initial formation and evolution of a dynamically young star cluster through cold (subvirial) collapse, starting with an ellipsoidal, turbulently seeded distribution of gas and forming sink particles representing (proto)stars.

TL;DR: In this article, a survey of chromospheric and transition region (TR) line emission in late-type stars obtained with the IUE satellite is presented, which is consistent with the picture advanced by many others that rapid rotation appears to result in enhanced fluxes.

TL;DR: In this article, the inner scattered light structure of the L1527 IRS (IRAS 04368+2557) was resolved in the Gemini image into a compact bipolar structure with a narrow dark lane in the center, consistent with the initial modeling of a bright inner cavity separated by a dark lane due to extinction along the line of sight of the central protostar by the disk.

TL;DR: In this paper, the photoevaporative loss alone, coupled with a range of initial angular momenta of the protostellar cloud, can explain the observed decline of the frequency of optically thick dusty disks with increasing age.