INFRARED-SPECTRA AND CIRCUMSTELLAR EMISSION OF LATE-TYPE STARS .2. IRAS CARBON STARS
文献类型：期刊论文
| 作者 | NOGUCHI, K; SUN, JH; WANG, G |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 1991 |
| 卷号 | 43期号:2页码:275-310 |
| ISSN号 | 0004-6264 |
| 关键词 | CARBON STARS CIRCUMSTELLAR DUST ENVELOPES CIRCUMSTELLAR EMISSION INFRARED SPECTRA OXYGEN-RICH STARS |
| 英文摘要 | We carried out near-infrared photometry of the J, H, K, L, and 3.1-mu-m bands for 67 IRAS sources which have a 11.3-mu-m emission feature due to silicon carbide dust in their IRAS low-resolution spectra. Since these stars have no optical counterpart, most of them are considered to be carbon stars surrounded, and thus obscured, by thick circumstellar dust envelopes. We examined the statistical characteristics of the infrared spectra of carbon stars by comparing them with those of oxygen-rich stars, including stars with thick circumstellar dust envelopes, on the basis of near-infrared photometric data, IRAS photometric data, and IR-AS low-resolution spectra. It is shown that near-infrared colors are a good indicator of the thickness of the circumstellar dust envelopes on the basis of the dilution effect of the 3-mu-m absorption in carbon stars and the change of the 10-mu-m silicate feature in oxygen-rich stars. Three diagrams (L-[12] versus K-L, [12]-[25] versus K-L, and 25-mu-m excess in IRAS data versus K-L) are used to discriminate stars with carbon-rich dust envelopes separately from oxygen-rich stars. In these diagrams oxygen-rich stars and carbon stars form separate sequences depending on K-L. The differences between oxygen-rich stars and carbon stars are due to differences in their infrared spectra of circumstellar dust emission. |
| WOS关键词 | DUST SHELLS ; MASS-LOSS ; MU-M ; PHOTOMETRY ; ENVELOPES ; ABSORPTION ; EVOLUTION ; GRAINS ; BAND |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | ASTRONOMICAL SOC JAPAN |
| WOS记录号 | WOS:A1991FY59000008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/21284]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | NOGUCHI, K |
| 作者单位 | CHINESE ACAD SCI,BEIJING ASTRON OBSERV,BEIJING 100080,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | NOGUCHI, K,SUN, JH,WANG, G. INFRARED-SPECTRA AND CIRCUMSTELLAR EMISSION OF LATE-TYPE STARS .2. IRAS CARBON STARS[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,1991,43(2):275-310. |
| APA | NOGUCHI, K,SUN, JH,&WANG, G.(1991).INFRARED-SPECTRA AND CIRCUMSTELLAR EMISSION OF LATE-TYPE STARS .2. IRAS CARBON STARS.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,43(2),275-310. |
| MLA | NOGUCHI, K,et al."INFRARED-SPECTRA AND CIRCUMSTELLAR EMISSION OF LATE-TYPE STARS .2. IRAS CARBON STARS".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 43.2(1991):275-310. |
入库方式： OAI收割
来源：国家天文台
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