| タイトル | H0, q0 and the local velocity field |
| 著者（英） | Sandage, A.; Tammann, G. A. |
| 著者所属（英） | Mount Wilson Observatory|Basel Univ.|European Southern Observatory |
| 発行日 | 1982-01-01 |
| 言語 | eng |
| 内容記述 | An attempt is made to find a systematic deviation from linearity for distances that are under the control of the Virgo cluster, and to determine the value of the mean random motion about the systematic flow, in order to improve the measurement of the Hubble and the deceleration constants. The velocity-distance relation for large and intermediate distances is studied, and type I supernovae are calibrated relatively as distance indicators and absolutely to obtain a new value for the Hubble constant. Methods of determining the deceleration constant are assessed, including determination from direct measurement, mean luminosity density, virgocentric motion, and the time scale test. The very local velocity field is investigated, and a solution is preferred with a random peculiar radial velocity of very nearby field galaxies of 90-100 km/s, and a Virgocentric motion of the local group of 220 km/s, leading to an underlying expansion rate of 55, in satisfactory agreement with the global value. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 82A42278 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/409253 |
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