| タイトル | Bipolar nebulae and mass loss from red giant stars |
| 著者（英） | Cohen, M. |
| 著者所属（英） | NASA Ames Research Center|California Univ. |
| 発行日 | 1985-01-01 |
| 言語 | eng |
| 内容記述 | Observations of several bipolar nebulae are used to learn something of the nature of mass loss from the probable red-giant progenitors of these nebulae. Phenomena discussed are: (1) probable GL 2688's optical molecular emissions; (2) newly discovered very high velocity knots along the axis of OH 0739 - 14, which reveal evidence for mass ejections of + or 300 km/s from the M9 III star embedded in this nebula; (3) the bipolar structure of three extreme carbon stars, and the evidence for periodic mass ejection in IRC + 30219, also at high speed (about 80 km/s); and (4) the curious cool TiO-rich region above Parsamian 13, which may represent the very recent shedding of photospheric material from a cool, oxygen-rich giant. Several general key questions about bipolar nebulae that relate to the process of mass loss from their progenitor stars are raised. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 86A31501 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/385496 |
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