4 papers
Ultracompact HII Regions
Stan Kurtz, Jose Franco
We review some recent observational results on the properties of ultracompact HII regions, in particular the presence of extended continuum emission surrounding ultracompact source…
Late AGB Magnetic Cycles: MHD Solutions for the HST PN Rings
Guillermo Garcia-Segura, Jose Alberto Lopez, Jose Franco
The Hubble Space Telescope has revealed the existence of multiple, regularly spaced, and faint concentric shells around some planetary nebulae. Here we present 2(1/2)D magnetohydro…
Interactions of Massive Stars with Their Parental Clouds
J. Franco, G. Garcia-Segura, T. Plewa
Here we discuss the interaction of massive stars with their parental molecular clouds. A summary of the dynamical evolution of HII regions and wind-driven bubbles in high-pressure…
The State of the Gas Around Young Stellar Groups
J. Franco, T. Plewa, G. Garcia-Segura
We present the main features in the evolution of the gas pressure in star forming regions, from the formation of the parental cloud to the moment when the region is pressurized by…