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Asymmetric Planetary Nebulae: Evidence of Bipolar Structures in Precursors - Dejan Vinković

This study presents evidence of bipolar structures in precursors of planetary nebulae (PNe) observed at Mt. Rainier National Park in 2003. The research discusses asymmetry in late stages of AGB winds and presents findings from IRC+10011 and IRC+10216, among others. The study explores density contrast, driving mechanisms, and jet evolution in AGB winds. The research raises questions about prevalence, time scales, driving mechanisms, and controlling parameters in AGB wind phase. Attend upcoming talks for further insights.

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Asymmetric Planetary Nebulae: Evidence of Bipolar Structures in Precursors - Dejan Vinković

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  1. ASYMMETRIC PLANETARY NEBULAE III Mt. Rainier National Park 28 July - 1 August 2003 Evidence of Bipolar Structures in Precursors of PNe Dejan Vinković University of Kentucky (IAS, Princeton) M. Elitzur (University of Kentucky) G. Weigelt, K-H Hofmann (MPIfR, Bonn)

  2. Evidence for bipolar jets in late stages of AGB winds AGB winds spherical (?) recall the talk by Sahai PPNs asymmetric  PNs asymmetric 

  3. Evidence for bipolar jets in late stages of AGB winds ? ?

  4. IRC+10011 (CIT3) – the prototype OH/IR star Hofmann et al ‘01  = 1.24 m  = 1.65 m  = 2.12 m Vinković et al ‘03

  5. IRC+10011 (CIT3)

  6. IRC+10011 (CIT3) – bipolarity inside • Spherical on large scales • Asymmetry at ~ 100 AU • Density contrast of 100 – ram pressure! • Driving mechanism very close to the star High-velocity young jet ?

  7. IRC+10216 – the prototype C-star HCN J = 1 – 0 Dayal & Bieging ‘95

  8. IRC+10216 – K-band Weigelt et al. ‘02

  9. IRC+10216 – the bipolarity inside • Spherical at ~ 4,000 AU (molecules; Lindqvist et al ‘00) • Asymmetric at ~ 60 AU (K-band; Men'shchikov et al ’02) • ~ 10-5 Myr-1 3·10-4 Myr-1about 50 years ago talk by Fong: signature of bipolarity in molecular shells in the outer envelope?

  10. Scheuer 1974 Late phases of high develop bipolarity

  11. Jet evolution? ? IRC+10011 IRC+10216 V Hydrae: talk by Sahai

  12. IRC+30219 (CIT6) Schmidt et al. ApJ (2002)

  13. IRC+30219 (CIT6) Schmidt et al. ApJ (2002)

  14. IRC+30219 (CIT6) the bipolarity outside • Asymmetric at > 1,000 AU • A few hundred years old • The next phase of IRC+10216?

  15. W43A – the Jets are Out! upcoming talk by Claussen! talk by Aryal(?): large bipolar lobes interacting with the ISM and probably started already in the AGB phase talk by Schoenberner: asymmetry in NGC6826 started already in the end of AGB phase Imai et al ‘02

  16. post-AGB jets are out (and evolving) Hen 3-1475: talk & poster by A.Riera multiple outflows: talk by Sahai rotational disks: talk by Jura CO asymmetry: talk by Meixner bipolar in molecules: talk by Castro-Carrizo

  17. …and also in PN K3-35 jet masers: talk by Miranda ... and many other presentations Miranda et al ‘01

  18. > 1000 AU < 100 AU < 100 AU > 1000 AU ~ ~ ~ ~ jet evolution IRC+10011 J image IRC+10216 J & K image IRC+30219 large bipolarity W43A jet (masers)

  19. Conclusions • AGB wind phase ends with jets • Questions: - how prevalent? • time scales? • driving mechanism? • controlling parameters? + upcoming talks!

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