کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1780522 | 1523808 | 2006 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stellar populations in barred spirals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Stellar populations in barred spirals Stellar populations in barred spirals](/preview/png/1780522.png)
چکیده انگلیسی
OASIS observations obtained at the Canada-France-Hawaii Telescope for the spiral galaxies NGC 4900 and NGC 5430 produce one spectrum for each 0.41â³ element of the 11â³Â à15â³ field of view. This allows for the spatial characterisation of the different stellar populations. From these observations we study the young (⩽10 Myr) and older stellar populations using evolutionary synthesis codes. Based on the gas emission lines, we find that the young populations are located in relatively small regions and dominate the integrated flux. In NGC 4900, the young populations are distributed in a bar-like structure featuring a hole near the position of the galaxy's centre. The young stellar populations of NGC 5430 form a nuclear ring and two patches at the base of the spiral arms. Based on Mg2 and FeI absorption lines, we find that in both galaxies, the young stars are superimposed on a relatively homogenous population of a few Gyr.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 49, Issues 10â12, January 2006, Pages 536-546
Journal: New Astronomy Reviews - Volume 49, Issues 10â12, January 2006, Pages 536-546
نویسندگان
Simon Cantin, Carmelle Robert, Anne Pellerin, Mercedes Mollá,