IC 348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars
文献类型：期刊论文
| 作者 | Palau, Aina1; Zapata, Luis A.1; Rodriguez, Luis F.1; Bouy, Herve2; Barrado, David2; Morales-Calderon, Maria2; Myers, Philip C.3; Chapman, Nicholas4,5; Juarez, Carmen6; Li, Di7,8
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2014-10-11 |
| 卷号 | 444期号:1页码:833-845 |
| 关键词 | brown dwarfs stars: formation ISM: individual objects: IC348-SMM2 ISM: jets and outflows ISM: lines and bands submillimetre: ISM |
| 英文摘要 | We report on Submillimeter Array observations of the 870 mu m continuum and CO (3-2), (CO)-C-13 (2-1), and (CO)-O-18 (2-1) line emission of a faint object, SMM2E, near the driving source of the HH 797 outflow in the IC 348 cluster. The continuum emission shows an unresolved source for which we estimate a mass of gas and dust of 30M(Jup), and the CO (3-2) line reveals a compact bipolar outflow centred on SMM2E, and barely seen also in (CO)-C-13 (2-1). In addition, (CO)-O-18 (2-1) emission reveals hints of a possible rotating envelope/disc perpendicular to the outflow, for which we infer a dynamical mass of similar to 16M(Jup). In order to further constrain the accreted mass of the object, we gathered data from Spitzer, Herschel, and new and archive submillimetre observations, and built the spectral energy distribution (SED). The SED can be fitted with one single-modified blackbody from 70 mu m down to 2.1 cm, using a dust temperature of similar to 24 K, a dust emissivity index of 0.8, and an envelope mass of similar to 35M(Jup). The bolometric luminosity is 0.10 L-circle dot, and the bolometric temperature is 35 K. Thus, SMM2E is comparable to the known Class 0 objects in the stellar domain. An estimate of the final mass indicates that SMM2E will most likely remain substellar, and the SMM2E outflow force matches the trend with luminosity known for young stellar objects. Thus, SMM2E constitutes an excellent example of a Class 0 proto-brown dwarf candidate which forms as a scaled-down version of low-mass stars. Finally, SMM2E seems to be part of a wide (similar to 2400 au) multiple system of Class 0 sources. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000342925100064 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6453]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Univ Nacl Autonoma Mexico, Ctr Radioastron & Astrofis, Morelia 58090, Michoacan, Mexico 2.INTA CSIC, Dept Astrofis, Ctr Astrobiol, E-28691 Madrid, Spain 3.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 4.Northwestern Univ, CIERA, Evanston, IL 60208 USA 5.Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA 6.Inst Ciencies Espai CSIC IEEC, Fac Ciencias, E-08193 Bellaterra, Catalunya, Spain 7.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 8.Space Sci Inst, Boulder, CO 80301 USA |
| 推荐引用方式 GB/T 7714 | Palau, Aina,Zapata, Luis A.,Rodriguez, Luis F.,et al. IC 348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,444(1):833-845. |
| APA | Palau, Aina.,Zapata, Luis A..,Rodriguez, Luis F..,Bouy, Herve.,Barrado, David.,...&Li, Di.(2014).IC 348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,444(1),833-845. |
| MLA | Palau, Aina,et al."IC 348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 444.1(2014):833-845. |
入库方式： OAI收割
来源：国家天文台
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