Identification of gravity waves in hydrodynamical simulations

被引：13

作者：

Dintrans, B

Brandenburg, A

机构：

[1] Observ Midi Pyrenees, CNRS, UMR 5572, F-31400 Toulouse, France

[2] NORDITA, DK-2100 Copenhagen O, Denmark

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 421卷 / 03期

关键词：

hydrodynamics; waves; stars : oscillations; stellar dynamics;

D O I：

10.1051/0004-6361:20035606

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The excitation of internal gravity waves by an entropy bubble oscillating in an isothermal atmosphere is investigated using direct two-dimensional numerical simulations. The oscillation field is measured by a projection of the simulated velocity field onto the anelastic solutions of the linear eigenvalue problem for the perturbations. This facilitates a quantitative study of both the spectrum and the amplitudes of excited g-modes.

引用

收藏

页码：775 / 782

页数：8

相关论文

共 26 条

[1]

[Anonymous], APJ

[2] ON THE GENERATION OF SOUND BY TURBULENT CONVECTION .1. A NUMERICAL EXPERIMENT [J].

BOGDAN, TJ ;

CATTANEO, F ;

MALAGOLI, A .

ASTROPHYSICAL JOURNAL, 1993, 407 (01) :316-&

[3]

BRANDENBURG A, 1988, ASTRON ASTROPHYS, V203, P154

[4] Magnetic structures in a dynamo simulation [J].

Brandenburg, A ;

Jennings, RL ;

Nordlund, A ;

Rieutord, M ;

Stein, RF ;

Tuominen, I .

JOURNAL OF FLUID MECHANICS, 1996, 306 :325-352

[5] Penetration and overshooting in turbulent compressible convection [J].

Brummell, NH ;

Clune, TL ;

Toomre, J .

ASTROPHYSICAL JOURNAL, 2002, 570 (02) :825-854

[6]

Cowling T.G., 1941, MON NOT R ASTRON SOC, V101, P367, DOI DOI 10.1093/MNRAS/101.8.367

[7] Stochastic excitation of gravity waves by overshooting convection in solar-type stars [J].

Dintrans, B ;

Brandenburg, A ;

Nordlund, Å ;

Stein, RF .

ASTROPHYSICS AND SPACE SCIENCE, 2003, 284 (01) :237-240

[8] A comparison of the anelastic and subseismic approximations for low-frequency gravity modes in stars [J].

Dintrans, B ;

Rieutord, M .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 324 (03) :635-642

[9]

DINTRANS B, 2004, UNPUB

[10] A search for solar g modes in the GOLF data [J].

Gabriel, AH ;

Baudin, F ;

Boumier, P ;

García, RA ;

Turck-Chièze, S ;

Appourchaux, T ;

Bertello, L ;

Berthomieu, G ;

Charra, J ;

Gough, DO ;

Pallé, PL ;

Provost, J ;

Renaud, C ;

Robillot, JM ;

Cortés, TR ;

Thiery, S ;

Ulrich, RK .

ASTRONOMY & ASTROPHYSICS, 2002, 390 (03) :1119-1131