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The gradient of the brightest star age and density across the spiral arm S4 in the Andromeda galaxyстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Efremov Y.N., Ivanov G.R.
- Журнал: Astrophysics and Space Science
- Том: 86
- Номер: 1
- Год издания: 1982
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 117
- Последняя страница: 129
- DOI: 10.1007/BF00651834
- Аннотация: Approximately 1400 stars in the spiral arm S4 of Andromeda were measured on a plate obtained with the 2-m RC telescope of the Bulgarian National Observatory. A pronounced gradient of star luminosity and density was found in the central part of S4; here, the stars become fainter at about 2m and their surface density decreases tenfold at a distance of approximately 1 kpc from the inner edge of the arm. The decline of maximum star brightness from this edge is interpreted as an age gradient; the velocity of star formation propagation across the arm was determined as approximately 60 km/s. If Andromeda has trailing spiral arms and the pitch angle of S4 is approximately 25 deg in its central part, the pattern velocity is approximately 7-14 km/s kpc.
- Добавил в систему: Ефремов Юрий Николаевич