Asymmetric Dusty Winds and Shells Around Pre- and Post-Cursors of Planetary Nebulae

Details Asymmetric Dusty Winds and Shells Around Pre- and Post-Cursors of Planetary Nebulae Asymmetric Dusty Winds and Shells Around Pre- and Post-Cursors of Planetary Nebulae

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..313..327g&link_type=abstract

Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird, Proceedings of the conference held 28 July - 1 August

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Key questions addressed by optical/infrared studies of Pre- and Post- Planetary Nebulae are posed. The observational evidence suggests that asymmetric dusty winds and fossil dust shell remnants are characteristic of almost all such objects that can be unambiguously identified. The asymmetries that lead to the axi-symmetric development of many PNe's appear to become ingrained in the circumstellar wind very early during the ascent of the Asymptotic Giant Branch and they become more persistant as AGB and Post-AGB age increases. All Post-PNe's that have been positively identified appear to be surrounded by asymmetric circumstellar winds and fossil dust remnants. Characteristic features of these winds are bipolar lobes and equatorial disks.

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