A Phenomenological Model for the Extended Zone Above AGB Stars
arXiv:0801.3089 · doi:10.1016/j.newast.2008.01.007
Abstract
I suggest the existence of an extended zone above the surface of asymptotic giant branch (AGB), as well as similar stars experiencing high mass loss rates. In addition to the escaping wind, in this zone there are parcels of gas that do not reach the escape velocity. These parcels of dense gas rise slowly and then fall back. The wind and bound gas exist simultaneously to distances of ~100AU. I term this region the effervescent zone. In this phenomenological study I find that the density of the bound material in the effervescent zone falls as ~r^{-5/2}, not much faster than the wind density. The main motivation to propose the effervescent model is to allow wide binary companions to influence the morphology of the descendant planetary nebulae (PN) by accreting mass from the effervescent zone. Accretion from the effervescent zone is more efficient than accretion from the wind in forming an accretion disk around the companion. The companion might then blow two jets that will shape the descendant PN.
New Astronomy, in press
References in corpus (31)
- Multiple Molecular Winds in Evolved Stars I. A Survey of CO(2-1) and CO(3-2) Emission from 45 Nearby AGB Stars
- Probing the mass-loss history of AGB and red supergiant stars from CO rotational line profiles I. Theoretical model -- Mass-loss history unravelled in VY CMa
- Atmospheric dynamics and the mass loss process in red supergiant stars
- A Detailed Analysis of the Dust Formation Zone of IRC+10216 Derived from Mid-IR Bands of C2H2 and HCN
- The 3D Morphology of VY Canis Majoris. I The Kinematics of the Ejecta
- Circular Polarization of Water Masers in the Circumstellar Envelopes of Late Type Stars
- A movie of a star: multi-epoch VLBA imaging of the SiO masers towards the Mira variable TX Cam
- X-ray Outburst in Mira A
- Rings in the Haloes of Planetary Nebulae
- The multiplicity of exoplanet host stars - Spectroscopic confirmation of the companions GJ3021B and HD27442B, one new planet host triple-star system, and global statistics
- Magnetic Field, Dust, and Axisymmetrical Mass Loss on the AGB
- Collimated Fast Winds in Wide Binary Progenitors of Planetary Nebulae
- Born Again Protoplanetary Disk Around Mira B
- Dust Formation Above Cool Magnetic Spots in Evolved Stars
- Dust Formation and Inhomogeneous Mass Loss from AGB Stars
- The variable mass loss of the AGB star WX Psc as traced by the CO J=1-0 through 7-6 lines and the dust emission
- Modelling CO emission from Mira's wind
- Magnetic Flares on Asymptotic Giant Branch Stars
- First Resolved Images of the Mira AB Symbiotic Binary at Centimeter Wavelengths
- Stellar Structure and Mass Loss on the Upper AGB
- On Titanium Carbide Nanoparticles as the Origin of the 21 Micron Emission Feature in Post-Asymptotic Giant Branch Stars
- Mid-IR Observations of Mira Circumstellar Environment
- Three-component modeling of C-rich AGB star winds IV. Revised interpretation with improved numerical descriptions
- Mira B Rejuvenated
- Kinematic structure of the atmosphere and envelope of the post-AGB star HD56126
- Backflow in Post-Asymptotic Giant Branch Stars
- Defining the Termination of the Asymptotic Giant Branch
- Continuum driven winds from super-Eddington stars. A tale of two limits
- Photospheric Opacity and Over-Expanded Envelopes of Asymptotic Giant Branch Stars
- Shaping Planetary Nebulae by Jets
- Stellar structure and mass loss during the early post asymptotic giant branch
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- A pre-explosion extended effervescent zone around core collapse supernova progenitors
- An analysis of a spectrum of V838 Monocerotis in October 2005
- Very Late Thermal Pulses Influenced by Accretion in Planetary Nebulae
- Accelerating very fast gas in the supernova impostor sn 2009ip with jets from a stellar companion
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- A companion star launching jets in the wind acceleration zone of a giant star