| タイトル | H-alpha Fabry-Perot interferometric observations of blue compact dwarf galaxies |
| 著者（英） | Thuan, Trinh Xuan; Williams, T. B.; Malumuth, E. |
| 著者所属（英） | Space Telescope Science Inst.|Virginia Univ.|Rutgers Univ. |
| 発行日 | 1987-01-01 |
| 言語 | eng |
| 内容記述 | H-alpha Fabry-Perot interferometric observations of the two blue compact dwarf galaxies (BCDs) 7 Zw 403 and 1 Zw 49 are presented. The velocity field of 7 Zw 403 shows no clear large-scale organized motion but the velocity field is not completely chaotic either. The gas associated with the 8 H II regions in 7 Zw 403 has neither the highest nor lowest velocities. The BCD 1 Zw 49 is dominated by a single H II region which is about 50 times brighter than any other feature in the galaxy. There is a chain of fainter H II regions extending across the galaxy. The velocity field is well ordered along the H II region chain, but it is very complex around the dominant H II region, suggesting H-alpha loops and filaments around the latter. Both BCDs show velocity gradients of about 25 km/s on scales of about 10 pc in 7 Zw 403 and of about 50 pc in 1 Zw 49. These velocity discontinuities compress the gas and are probably responsible for the star formation. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 89A10016 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/367811 |
