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Young stellar clumps in the interacting system Arp 305статья
Статья опубликована в высокорейтинговом журнале
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: 16 января 2019 г.
- Авторы: Zasov Anatoly V., Saburova Anna S., Egorov Oleg V., Afanasiev Viktor L.
- Журнал: Monthly Notices of the Royal Astronomical Society
- Том: 477
- Номер: 4
- Год издания: 2018
- Издательство: Oxford Journals, Oxford University Press
- Местоположение издательства: Oxford, UK, England
- Первая страница: 4908
- Последняя страница: 4914
- DOI: 10.1093/mnras/sty1017
- Аннотация: We present the results from optical long-slit spectral observations of the interacting system Arp 305 that were carried out at the 6-m Big Telescope Alt-azimuth (BTA) at the Special Astrophysical Observatory, Russian Academy of Sciences. We look at the radial variation of gas kinematics and oxygen abundance. This study continues the series of spectral observations of tidal debris in interacting galaxies. Here we pay special attention to the star-forming region between the interacting galaxies – a tidal dwarf galaxy (TDG) candidate. This star-forming system appears to be gravitationally bound, or close to this condition. We show that the TDG is metal-poor in comparison to the parental galaxy. This can indicate that either the origin of the TDG's star-forming gas was very far from the centre of the parent galaxy or its gas has been diluted by the accretion of metal-poor intergalactic gas. Nevertheless, the region of the brightest emission clump in the TDG, where current star formation takes place, reveals a noticeable colour excess, which might indicate a local gas concentration. We note that the TDG is situated in the region where two gas flows intersect and that it is in a process of formation probably caused by the collision of these flows. The small difference in the velocity of the TDG, NGC 4017 and the gaseous bridge between them indicates that the lifetime of the TDG is restricted by the time of its fall back on to the parent galaxy.
- Добавил в систему: Сабурова Анна Станиславовна