Моделирование двугорбых кривых вращения газа в осесимметричном гравитационном поле галактик

Автор: Пейч М.М., Морозов А.Г., Хоперсков А.В.

Журнал: Математическая физика и компьютерное моделирование @mpcm-jvolsu

Статья в выпуске: 3 т.26, 2023 года.

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Представлены результаты построения моделей галактических дисков с так называемыми двугорбыми кривыми вращения газа, когда имеются зоны резкого изменения круговой скорости. Такие модели допускают развитие сдвиговых гидродинамических неустойчивостей, в частности, центробежной неустойчивости и неустойчивости типа акустического резонанса. В построенных моделях внутренний пик скорости вращения связан с наличи- ем околоядерного звездного диска. Изучено влияние параметров модели как внутреннего, так и основного экспоненциального звездного диска на радиальные профили круговой скорости. Развит численный метод, обеспечивающий построение двугорбых кривых вращения с произвольными распределениями поверхностной плотности звездного диска. Сформирована выборка галактик с кривыми вращения, содержащими области резких отрицательных градиентов. Модели этих объектов предназначены для проведения вычислительных экспериментов, направленных на изучение образования спиральных структур вследствие развития гидродинамической неустойчивости. Мы выбрали объекты, кривые вращения которых в центральной области не могут быть смоделированы сфероидальными галактическими балджами, что указывает на наличие особых компонент в составных моделях звездного диска, похожих на околоядерные диски.

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Галактики, кривые вращения, гидродинамические неустойчивости, декомпозиция, круговая скорость

Короткий адрес: https://sciup.org/149144550

IDR: 149144550 | DOI: 10.15688/mpcm.jvolsu.2023.3.7

Список литературы Моделирование двугорбых кривых вращения газа в осесимметричном гравитационном поле галактик

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