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Evidence of Hot-Bottom-Burning in Extreme OH/IR Stars
- Source :
- 宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe. :231-234
- Publication Year :
- 2018
- Publisher :
- 宇宙航空研究開発機構(JAXA), 2018.
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Abstract
- SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan<br />Observations by Herschel Space Observatory of extreme OH/IR stars indicate that these objects currently undergo a phase of very high mass loss - superwind. We derived relatively low 12C/13C ratios which is indicative of the hot-bottom burning process. Further evidence from the observed oxygen isotopes (16O/17O/18O) also support this idea. We conclude that these stars are massive (M greater than or equal to 5 solar mass) AGB stars. With SPICA-SAFARI, it will be possible to observe these isotopic ratios in a number of these stars as they contribute significant gas and dust mass return to the interstellar medium of our galaxy.<br />形態: カラー図版あり<br />Physical characteristics: Original contains color illustrations<br />資料番号: AA1730027049<br />レポート番号: JAXA-SP-17-010E
Details
- Language :
- English
- ISSN :
- 24332232
- Database :
- OpenAIRE
- Journal :
- 宇宙航空研究開発機構特別資料 = JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe
- Accession number :
- edsair.jairo.........26ee53a13f49f53294ec4128099626d3