SUBMILLIMETER ARRAY AND VERY LARGE ARRAY OBSERVATIONS IN THE HYPERCOMPACT HII REGION G35.58-0.03
文献类型：期刊论文
| 作者 | Zhang, Chuan-Peng1,2,3,4 ; Wang, Jun-Jie1,3; Xu, Jin-Long1,3; Wyrowski, Friedrich2; Menten, Karl M.2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-04-01 |
| 卷号 | 784期号:2 |
| 关键词 | HII regions ISM: individual objects (G35.58-0.03) stars: formation |
| 英文摘要 | The formation of hypercompact (HC) HII regions is an important stage in massive star formation. Spectral line and continuum observations can explore its dynamic conditions. We present high angular resolution observations carried out with the Submillimeter Array (SMA) and the Very Large Array (VLA) toward the HC HII region G35.58-0.03. With the 1.3 mm SMA and 1.3 cm VLA, we detected a total of about 25 transitions of 8 different species and their isotopologues (CO, CH3CN, SO2, CH3CCH, OCS, CS, H, and NH3). G35.58-0.03 consists of an HC H II core with electron temperature T*(e) >= 5500 K, emission measure EM approximate to 1.9 x 10(9) pc cm(-6), local volume electron density ne = 3.3 x 10(5) cm(-3), and a same width of radio recombination line FWHM approximate to 43.2 kms(-1) for both H30 alpha and H38 beta at its intrinsic core size similar to 3714 AU. The H30 alpha line shows evidence of an ionized outflow driving a molecular outflow. Based on the derived Lyman continuum flux, there should be an early-type star equivalent to O6.5 located inside the H II region. From the continuum spectral energy distribution from 3.6 cm, 2.0 cm, 1.3 cm, 1.3 mm and 0.85 mm to 0.45 mm, we distinguished the free-free emission (25% similar to 55%) from the warm dust component (75% similar to 45%) at 1.3 mm. The molecular envelope shows evidence of infall and outflow with an infall rate of 0.05M(circle dot) yr(-1) and a mass loss rate of 5.2 x 10(-3) M-circle dot yr(-1). The derived momentum (similar to 0.05 M-circle dot km s(-1)) is consistent between the infalling and outflowing gas per year. It is suggested that the infall is predominant and the envelope mass of dense core is increasing rapidly, but the accretion in the inner part might already be halted. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335519400022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6433]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Max Planck Inst Radioastron, D-53121 Bonn, Germany 3.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chuan-Peng,Wang, Jun-Jie,Xu, Jin-Long,et al. SUBMILLIMETER ARRAY AND VERY LARGE ARRAY OBSERVATIONS IN THE HYPERCOMPACT HII REGION G35.58-0.03[J]. ASTROPHYSICAL JOURNAL,2014,784(2). |
| APA | Zhang, Chuan-Peng,Wang, Jun-Jie,Xu, Jin-Long,Wyrowski, Friedrich,&Menten, Karl M..(2014).SUBMILLIMETER ARRAY AND VERY LARGE ARRAY OBSERVATIONS IN THE HYPERCOMPACT HII REGION G35.58-0.03.ASTROPHYSICAL JOURNAL,784(2). |
| MLA | Zhang, Chuan-Peng,et al."SUBMILLIMETER ARRAY AND VERY LARGE ARRAY OBSERVATIONS IN THE HYPERCOMPACT HII REGION G35.58-0.03".ASTROPHYSICAL JOURNAL 784.2(2014). |
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来源：国家天文台
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