2010A&A...514A..45A


Query : 2010A&A...514A..45A

2010A&A...514A..45A - Astronomy and Astrophysics, volume 514, A45-45 (2010/5-1)

The instability strip and pulsation features of post-AGB star models.

AIKAWA T.

Abstract (from CDS):

The instability strip and characteristics of the nonlinear behavior of the radial pulsation are examined for the observed photometric variability of post-AGB stars. A linear stability analysis for radial pulsation modes is performed in the domain 3.70≤logTeff≤3.90, 0.0≤logg≤1.8, assuming a total mass 0.6M and 0.8M for post-AGB stars. Radial modes up to the 5th overtone are considered, since we expect that there are some strange modes amongst high-order modes. Nonlinear simulations are tried for all the models, which have at least one pulsationally unstable mode. Pulsationally unstable modes are found in a large region of the domain, and these modes may be responsible for the observed variability. Nonlinear simulations on models that have unstable modes with higher overtones reveal the variability through small peak-to-peak variations. These variations are characteristics of the observed variations for some post-AGB stars located in the bluer region of the classical instability strip.

Abstract Copyright:

Journal keyword(s): stars: oscillations - stars: AGB and post-AGB - 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 - 2022
#notes
1 IRAS Z02229+6208 pA* 02 26 41.7882689568 +62 21 21.981286008   14.69 12.00 11.16 8.92 G8-K0_0-Ia: 53 0
2 IRAS 04296+3429 pA* 04 32 56.9743899192 +34 36 12.459816288   16.13 14.09 13.64 11.64 G0Ia 139 0
3 V* V382 Aur pA* 06 37 52.4269199856 +53 31 01.958446992   9.54 9.04     F7IV: 127 0
4 HD 56126 pA* 07 16 10.2590823192 +09 59 47.954735376   9.20 8.32     F0/5Ia 310 0
5 V* AC Her pA* 18 30 16.2373118976 +21 52 00.599340000 8.00 7.79 7.01     F4Ibp 325 0
6 V* R Sct RV* 18 47 28.9498974024 -05 42 18.542611800 8.30 6.67 5.20 4.14 3.37 K4/5pec 306 0
7 Hen 1-5 pA* 20 11 56.0595568008 +20 20 04.420944132 11.41 10.66 9.45     G8/K0Iae 497 0
8 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 853 1

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2022.05.24-11:54:06

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