| タイトル | Accurate galactic N(H) values towards quasars and AGN |
| 著者（英） | Lockman, Felix J.; Wilkes, Belinda J.; Elvis, Martin |
| 著者所属（英） | Harvard-Smithsonian Center for Astrophysics|National Radio Astronomy Observatory |
| 発行日 | 1989-03-01 |
| 言語 | eng |
| 内容記述 | Integrated Galactic 21-cm column densities toward about 174 quasars and AGN are presented. The data are corrected for stray radiation, using the technique of Lockman et al. (1986). Because of the 21-arcmin beam size of the 140-ft telescope used in the study, the uncertainty in N(H) due to angular variations in the H I of the Galaxy at high latitudes is minimized. The column densities are accurate to about 1 X 10 to the 19th atoms/sq cm, or 5 percent, whichever is larger. Errors above N(H) of about 4 X 10 to the 20th atoms/sq cm are dominated by opacity uncertainties. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 89A31264 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/364529 |
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