97 citations · 935 across the 35 of their papers we have counts for
5 papers · 1 filter
Planetary nebulae : getting closer to an unbiased binary fraction
D. Douchin, O. De Marco, G. H. Jacoby +5
Why 80% of planetary nebulae are not spherical is not yet understood. The Binary Hypothesis states that a companion to the progenitor of the central star of a planetary nebula is r…
Testing the binary hypothesis for the formation and shaping of planetary nebulae
D. Douchin, O. De Marco, G. H. Jacoby +5
There is no quantitative theory to explain why a high 80% of all planetary nebulae are non-spherical. The Binary Hypothesis states that a companion to the progenitor of a central s…
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…
Radial Velocities of Galactic O-Type Stars. II. Single-lined Spectroscopic Binaries
S. J. Williams, D. R. Gies, T. C. Hillwig +2
We report on new radial velocity measurements of massive stars that are either suspected binaries or lacking prior observations. This is part of a survey to identify and characteri…
IC 4663: The first unambiguous [WN] Wolf-Rayet central star of a planetary nebula
B. Miszalski, P. A. Crowther, O. De Marco +4
We report on the serendipitous discovery of the first central star of a planetary nebula (PN) that mimics the helium- and nitrogen-rich WN sequence of massive Wolf-Rayet (WR) stars…