کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1780397 | 1523806 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Near IR diffraction-limited integral-field SINFONI spectroscopy of the Circinus galaxy
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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: Near IR diffraction-limited integral-field SINFONI spectroscopy of the Circinus galaxy Near IR diffraction-limited integral-field SINFONI spectroscopy of the Circinus galaxy](/preview/png/1780397.png)
چکیده انگلیسی
Using the adaptive optics assisted near infrared integral field spectrometer SINFONI on the VLT, we have obtained observations of the Circinus galaxy on parsec scales. The morphologies of the H2 (1-0)S(1) 2.12 μm and Brγ 2.17 μm emission lines are only slightly different, but their velocity maps are similar and show a gradient along the major axis of the galaxy, consistent with rotation. Since Vrot/Ï â 1 suggests that random motions are also important, it is likely that the lines arise in a rotating spheroid or thickened disk around the AGN. Comparing the Brγ flux to the stellar continuum indicates that the star formation in this region began â¼108 yr ago. We also detect the [Sivi] 1.96 μm, [Alix] 2.04 μm and [Caviii] 2.32 μm coronal lines. In all cases we observe a broad blue wing, indicating the presence of two or more components in the coronal line region. A correlation between the ionisation potential and the asymmetry of the profiles was found for these high excitation species.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 50, Issues 4â5, June 2006, Pages 439-442
Journal: New Astronomy Reviews - Volume 50, Issues 4â5, June 2006, Pages 439-442
نویسندگان
F. Mueller Sánchez, R.I. Davies, F. Eisenhauer, L.J. Tacconi, R. Genzel,