کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1780255 1523802 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure and kinematics of large spiral galaxies
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
Structure and kinematics of large spiral galaxies
چکیده انگلیسی
We parametrise the structure and kinematics of four large and massive spiral galaxies in terms of a tilted-ring model of the Hi disk. Only one of the examined galaxies shows a typical warp structure, suggesting that warps are rarer towards larger masses of spiral galaxies. The galaxies show a sharp drop in the Hi surface density profile at a large radius, which determines the edge of the Hi disk. Beyond this edge we do not detect any neutral gas. Including the results of earlier, similar studies, we find a possible anti-correlation of the size of Hi disks of spiral galaxies (in terms of optical radii) with the optical radius of a galaxy. An extremely massive Hi cloud without any stellar counterpart in the DSS2 is found to interact with UGC 2153.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 51, Issues 1–2, February 2007, Pages 120-124
نویسندگان
, , , , , ,