2005A&A...444..849R


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET19:49:46

2005A&A...444..849R - Astronomy and Astrophysics, volume 444, 849-860 (2005/12-4)

Blowing up warped disks in 3D. Three-dimensional AMR simulations of point-symmetric nebulae.

RIJKHORST E.-J., MELLEMA G. and ICKE V.

Abstract (from CDS):

The Generalized Interacting Stellar Winds model has been very successful in explaining observed cylindrical and bipolar shapes of planetary nebulae. However, many nebulae have a multipolar or point-symmetric shape. Previous two-dimensional calculations showed that these seemingly enigmatic forms can be reproduced by a two-wind model in which the confining disk is warped, as is expected to occur in irradiated disks. In this paper we present the extension to fully three-dimensional Adaptive Mesh Refinement simulations using the publicly available hydrodynamics package Flash. We briefly describe the mechanism leading to a radiation driven warped disk, and give an equation for its shape. We derive time scales related to the disk and compare them to the radiative cooling time scale of the gas, thereby determining the relevant part of parameter space. By comparing two-dimensional calculations including realistic radiative cooling through a cooling curve, with ones employing a low value for the adiabatic index γ, we show that the latter, computationally less expensive approach, is a valid approximation for treating cooling in our nebulae. The results of the fully three-dimensional wind-disk simulations show our mechanism to be capable of producing a plethora of multipolar (and quadrupolar) morphologies, which can explain the observed shape of a number of (proto-)planetary nebulae.

Abstract Copyright:

Journal keyword(s): planetary nebulae: general - methods: numerical - hydrodynamics

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PN M 4-18 PN 04 25 50.8357219366 +60 07 12.778708522   14.22 13.96     [WC11] 170 0
2 NGC 3242 PN 10 24 46.1335198512 -18 38 32.294434711   11.83 12.15     ~ 802 1
3 PN M 1-26 PN 17 45 57.6652777318 -30 12 00.874208077   12.89 12.08 12.00   [WR] 203 0
4 NGC 6751 PN 19 05 55.5385116189 -05 59 32.291075445   15.78 15.48     [WC4] 321 0
5 PN K 3-24 PN 19 12 05.88 +15 09 04.5           ~ 44 0
6 NGC 7009 PN 21 04 10.8153350719 -11 21 48.581808296   12.48 12.07     ~ 969 1
7 NGC 7026 PN 21 06 18.5721833093 +47 51 06.780221314   15.33 15.1     [WC3] 406 1
8 NGC 7662 PN 23 25 53.6 +42 32 06   9.4 12     ~ 913 0

    Equat.    Gal    SGal    Ecl

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2021.03.07-19:49:46

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