|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Hierarchy and size distribution function of star formation regions in the spiral galaxy NGC 628статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 9 сентября 2014 г.
- Автор: Gusev Alexander S.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 442
- Номер: 4
- Год издания: 2014
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 3711
- Последняя страница: 3721
- DOI: 10.1093/mnras/stu1095
- Аннотация: Hierarchical structures and the size distribution of star formation regions in the nearby spiral galaxy NGC 628 are studied over a range of scales from 50 to 1000 pc using optical images obtained with the 1.5-m telescope of the Maidanak Observatory. We have found hierarchically structured concentrations of star formation regions in the galaxy, and smaller regions with a higher surface brightness are located inside larger complexes that have a lower surface brightness. We illustrate this hierarchy using a dendrogram, or structure tree, of the detected star formation regions, which demonstrates that most of these regions are combined into larger structures over several levels. We have found three characteristic sizes of young star groups: a parts per thousand 65 pc (OB associations), a parts per thousand 240 pc (stellar aggregates) and a parts per thousand 600 pc (star complexes). The cumulative size distribution function of star formation regions is found to be a power law with a slope of approximately -1.5 on scales appropriate to diameters of associations, aggregates and complexes. This slope is close to the slope found earlier by B. Elmegreen et al. for star formation regions in the galaxy on scales from 2 to 100 pc.
- Добавил в систему: Гусев Александр Сергеевич