تقرير
The empty ring galaxy ESO 474 - G040
| العنوان: | The empty ring galaxy ESO 474 - G040 |
|---|---|
| المؤلفون: | Brosch, Noah, Vaisanen, Petri, Kniazev, Alexei, Moiseev, Alexei |
| سنة النشر: | 2015 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We describe observations of the apparently empty ring galaxy ESO 474-G040 obtained with the Southern African Large Telescope (SALT). The observations, consisting of imaging, long-slit spectroscopy and Fabry-Perot mapping of the H-alpha line, allow determining the ring kinematics as well as estimating the metallicity of the ring and the stellar population composition in its various parts. We propose that the object could best be understood as being the result of a past merger of disk galaxies, which formed a gas ring that subsequently disrupted via the bead instability and is presently forming stars. Comment: MNRAS, in press. 28 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1506.00409 |
| رقم الأكسشن: | edsarx.1506.00409 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |