13 citations · 13 across the 1 of their papers we have counts for
2 papers
astro-ph2006★ 13 cited
Shaping bipolar Planetary Nebulae : How mass loss leads to waistline development
Catharinus Dijkstra, Angela Speck
Asymptotic Giant Branch (AGB) stars generally have spherically symmetric envelopes, whereas most post-AGB stars and Planetary Nebulae (PNe) show axisymmetric circumstellar envelope…
astro-ph2005
The Multitude of Molecular Hydrogen Knots in the Helix Nebula
Margaret Meixner, Peter McCullough, Joel Hartman +2
We present HST/NICMOS imaging of the H_2 2.12 μm emission in 5 fields in the Helix Nebula ranging in radial distance from 250-450" from the central star. The images reveal arcuate…