OBSERVED RELATIONSHIP BETWEEN CO 2-1 AND DUST EMISSION DURING THE POST-ASYMPTOTIC-GIANT-BRANCH PHASE
文献类型：期刊论文
| 作者 | He JH(何金华)1 ; Szczerba, R2; Hasegawa, TI3; Schmidt, MR2
|
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2014-02 |
| 卷号 | 210期号:2 |
| 关键词 | circumstellar matter infrared: stars planetary nebulae: general radio lines: stars stars: AGB and post-AGB stars: mass-loss |
| ISSN号 | 0067-0049 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | He, JH (reprint author), Chinese Acad Sci, Yunnan Observ, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming, Yunnan Province, Peoples R China. |
| 英文摘要 | A CO 2-1 line survey is performed toward a sample of 58 high Galactic latitude post-asymptotic-giant-branch (pAGB) stars. To complement the observations, a compilation of literature CO 2-1 line data of known pAGB stars is done. After combining the data sets, CO 2-1 line data are available for 133 pAGB stars (about 34% of known pAGB stars) among which 44 are detections. The CO line strengths are compared with infrared dust emission for these pAGB stars by defining a ratio between the integrated CO 2-1 line flux and IRAS 25 mu m flux density (CO-IR ratio). We refer to the relationship between the CO-IR ratio and the IRAS color C23 (defined with the 25 and 60 mu m flux densities) as the CO-IR diagram. The pAGB objects are found to be located between AGB stars and planetary nebulae (PNe), and are segregated into three distinctive groups (I, II, and III) on the CO-IR diagram. By analyzing their various properties such as chemical types, spectral types, binarity, circumstellar envelope expansion velocities, and pAGB sub-types on the CO-IR diagram, we argue that the group-I objects are mainly intermediate-mass C-rich pAGB stars in the early pAGB stage (almost all of the considered carbon-rich "21 mu m" stars belong to this group), the group-II objects are massive or intermediate mass pAGB stars that already follow the profound trend of PNe, and the group-III objects are mainly low-mass binary pAGB stars with very weak CO 2-1 line emission (almost all of the considered RV Tau variables belong to this group). The CO-IR diagram is proven to be a powerful tool for investigating the co-evolution of circumstellar gas and dust during the short pAGB stage of stellar evolution. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | MASS-LOSS RATES ; RV-TAURI STARS ; HIGH-RESOLUTION OBSERVATIONS ; PROTOPLANETARY NEBULA CRL-618 ; RICH CIRCUMSTELLAR ENVELOPES ; YOUNG PLANETARY-NEBULAE ; VELOCITY AGB STARS ; IRAS POINT SOURCES ; 21 MU-M ; RED-RECTANGLE |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0067-0049/210/2/26/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000331239000012 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4583]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan Province, China 2.N. Copernicus Astronomical Center, Rabianska 8, 87-100 Torun, Poland 3.Academia Sinica, Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei 10617, Taiwan |
| 推荐引用方式 GB/T 7714 | He JH,Szczerba, R,Hasegawa, TI,et al. OBSERVED RELATIONSHIP BETWEEN CO 2-1 AND DUST EMISSION DURING THE POST-ASYMPTOTIC-GIANT-BRANCH PHASE[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2014,210(2). |
| APA | He JH,Szczerba, R,Hasegawa, TI,&Schmidt, MR.(2014).OBSERVED RELATIONSHIP BETWEEN CO 2-1 AND DUST EMISSION DURING THE POST-ASYMPTOTIC-GIANT-BRANCH PHASE.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,210(2). |
| MLA | He JH,et al."OBSERVED RELATIONSHIP BETWEEN CO 2-1 AND DUST EMISSION DURING THE POST-ASYMPTOTIC-GIANT-BRANCH PHASE".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 210.2(2014). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。