AGBs, Post-AGBs and the Shaping of Planetary Nebulae
作者： Eric Lagadec
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摘要: During the last decades, observations, mostly with Hubble Space Telescope, have revealed that round Planetary Nebulae were exception rather than rule. A huge variety of features are observed, such as jets, discs, tori, showing ejection material is not due to isotropic radiation pressure on a spherical shell and more physics involved. This shaping process certainly occur early in evolution these low intermediate mass stars must leave imprints evolutionary stages prior PN phase. Thanks news instruments most advanced telescopes (e.g., VLTI, SPHERE/VLT ALMA), high angular resolution observations revolutionising our view gas dust during AGB post-AGB phases. In this review I will present newest results concerning loss from stars, related objects.
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