| タイトル | The H II regions of the galaxy M101 |
| 著者（英） | Hester, J. J.; Dufour, R. J.; Scowen, P. A. |
| 著者所属（英） | NASA Johnson Space Center|NASA Goddard Space Flight Center |
| 発行日 | 1992-07-01 |
| 言語 | eng |
| 内容記述 | The physical properties and composition of the H II region population of the spiral galaxy M101 (NGC 5457) were examined using spectrophotometrically calibrated CCD imagery of two overlapping 16-arcmin fields in the M101, in which individual H II regions were identified and mapped using an automated algorithm. The characteristics obtained for the H II region population of M101 include the H II region luminosity function and radial variations in extinction; the forbidden O III line/H-beta, O/H, and forbidden S II line/H-alpha ratios; the ionization parameter U; and the numbers of ionizing photons. Global variations of physical properties of the H II regions in M101 are compared to model expectations derived for other galaxies. The evident star formation in the M101 galaxy is discussed. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 92A45733 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/325905 |
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