29 citations · 29 across the 2 of their papers we have counts for
3 papers
Planetary Nebulae
Orsola De Marco, Isabel Aleman, Stavros Akras
Planetary nebulae are formed by the matter ejected by low-to-intermediate mass stars (~0.8-8 times the mass of the Sun) towards the end of their lives. As hydrogen and then helium…
IC4663: the first unambiguous [WN] Wolf-Rayet central star of a planetary nebula
Brent Miszalski, Paul A. Crowther, Orsola De Marco +4
Several [WC]-type central stars of planetary nebulae (PNe) are known to mimic the spectroscopic appearance of massive carbon-rich or WC-type Wolf-Rayet stars. In stark contrast, no…
Cloud fragmentation and proplyd-like features in HII regions imaged by HST
Orsola De Marco, C. R. O'Dell, Pamela Gelfond +2
We have analyzed HST ACS and WFPC2 new and archival images of eight HII regions to look for new proto-planetary disks (proplyds) similar to those found in the Orion Nebula. We find…