PMO OpenIR  > 分子云与恒星形成研究团组
Near-infrared polarimetric and spectrometric study of the massive star-forming region S87
Chen, X; Yao, Y; Yang, J; Jiang, Z; Ishii, M
2004-12-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume428Issue:2Pages:523-533
AbstractWe present JHK' imaging polarimetry for the massive star-forming region S87, and K-band spectrometry from 2.0 to 2.35 mum for several infrared sources in the region. The polarimetric patterns of S87E reveal a deeply embedded source (DES-S87) associated with reflection nebulosities. Exciting OH maser and 1.3 mm dust continuum emission, the DES-S87 is suggested to be the youngest star in S87 and the driving source of bipolar CO outflow in the region. A blue cavity is discovered in the [J-K'] color image, to the southwest of DES. Radial dependence of polarization degrees in the cavity could be fitted to the slab model of outflows at an inclination of similar to60degrees out of the plane of the sky (Minchin et al. 1991b). The nebular complex of S87E can be divided into three area. The North nebula, exhibiting a bipolar structure, may represent a bipolar outflow in the northwest-southeast direction. The southwest nebula traces the blueshifted CO outflow and corresponds to the cavity structure discovered in the [J-K'] color image. The nebular structure of S87E suggests a quadrupolar outflow driven by DES-S87. A well-defined centrosymmetric pattern is found in the nebula of S87W with high degrees of polarization, which indicates single scattering off small dust grains in the reflection nebula. The polarimetric vectors around NIRSA show a polarization disk feature oriented in the southeast-northwest direction. Strong Brgamma emission and H-2 emissions are found in the K-band spectra, indicating the presences of strong stellar wind, envelope/disk, shocked gas, and high-density PDRs in the circumstellar environment of S87E and S87W. According to the K-band spectrum, the mass of DES-S87E is estimated to be 20 M-circle dot.
KeywordIsm : Individual : Objects S87 Ism : Lines And bAnds Polarization Stars : Formation Instrumentation : Polarimeters
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1051/0004-6361:20041264
WOS KeywordYOUNG STELLAR OBJECTS ; H-II REGIONS ; MOLECULAR-HYDROGEN EMISSION ; DEEPLY EMBEDDED SOURCE ; IMAGING POLARIMETRY ; POLARIZATION MAPS ; K-BAND ; REFLECTION NEBULAE ; MULTIPOLAR OUTFLOW ; BIPOLAR NEBULAE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000225335100016
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7691
Collection分子云与恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Natl Astron Observ Japan, Mitaka, Tokyo 181, Japan
Recommended Citation
GB/T 7714
Chen, X,Yao, Y,Yang, J,et al. Near-infrared polarimetric and spectrometric study of the massive star-forming region S87[J]. ASTRONOMY & ASTROPHYSICS,2004,428(2):523-533.
APA Chen, X,Yao, Y,Yang, J,Jiang, Z,&Ishii, M.(2004).Near-infrared polarimetric and spectrometric study of the massive star-forming region S87.ASTRONOMY & ASTROPHYSICS,428(2),523-533.
MLA Chen, X,et al."Near-infrared polarimetric and spectrometric study of the massive star-forming region S87".ASTRONOMY & ASTROPHYSICS 428.2(2004):523-533.
Files in This Item:
File Name/Size DocType Version Access License
2004002Near-infrared(650KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, X]'s Articles
[Yao, Y]'s Articles
[Yang, J]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, X]'s Articles
[Yao, Y]'s Articles
[Yang, J]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, X]'s Articles
[Yao, Y]'s Articles
[Yang, J]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2004002Near-infrared polarimetric and spectrometric study of the massive star-forming region S87 .pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.