A search for optical outflows from brown dwarfs in the Chamaeleon I molecular cloud
文献类型：期刊论文
| 作者 | Wang, HC ; Henning, T
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2006-06-01 |
| 卷号 | 643期号:2页码:985-994 |
| 关键词 | ISM : Herbig-Haro objects ISM : individual (Chamaeleon I) ISM : jets and outflows stars : formation stars : low-mass, brown dwarfs |
| ISSN号 | 0004-637X |
| 英文摘要 | A deep and wide-field HH object survey has been carried out toward the Chamaeleon I (Cha I) molecular cloud with a sky coverage of 1 degrees x 2 degrees, which embraces the entire Cha I molecular cloud. In total, 18 HH objects have been detected, including the previously known objects HH 48-51. The newly discovered HH objects are named HH 905-918. The possible exciting sources of the detected HH objects are discussed based on the morphology and locations of the HH objects and on results of previous surveys. Although more than 40 brown dwarfs or brown dwarf candidates have been detected in Cha I, no compelling evidence for optical outflows from brown dwarfs has been found in our images at the detection limit of 2.3 x 10(-20) W m(-2) arcsec(-2) (3 sigma) in the [S II] lambda lambda 6717, 6731 emission. The typical peak brightness of HH objects in Cha I is about 20 times above our detection limit. We conclude that the brightness of optical outflows from substellar objects should be about 20 times lower than that of outflows from young solar-type stars if all the HH objects detected in Cha I are driven by young stars. In three cases - i.e., HH 51, 908, and 909 - however, there are hints of a connection between HH objects and the nearby brown dwarfs or very low mass stars. |
| 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] | HERBIG-HARO OBJECTS ; YOUNG STELLAR OBJECT ; STAR-FORMING REGION ; T-TAURI STARS ; DARK-CLOUD ; X-RAY ; IRAS OBSERVATIONS ; INFRARED NEBULA ; EXCITING STARS ; DISKS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000238338700032 |
| 公开日期 | 2012-02-07 |
| 源URL | [http://159.226.72.40/handle/332002/3522]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Max Planck Inst Astron, D-69117 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Wang, HC,Henning, T. A search for optical outflows from brown dwarfs in the Chamaeleon I molecular cloud[J]. ASTROPHYSICAL JOURNAL,2006,643(2):985-994. |
| APA | Wang, HC,&Henning, T.(2006).A search for optical outflows from brown dwarfs in the Chamaeleon I molecular cloud.ASTROPHYSICAL JOURNAL,643(2),985-994. |
| MLA | Wang, HC,et al."A search for optical outflows from brown dwarfs in the Chamaeleon I molecular cloud".ASTROPHYSICAL JOURNAL 643.2(2006):985-994. |
入库方式： OAI收割
来源：紫金山天文台
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