PMO OpenIR  > 太阳活动的多波段观测研究团组
MASSIVE QUIESCENT CORES IN ORION. VI. THE INTERNAL STRUCTURES AND A CANDIDATE OF TRANSITING CORE IN NGC 2024 FILAMENT
Ren, Zhiyuan1,2,3; Li, Di1,2
2016-06-10
Source PublicationASTROPHYSICAL JOURNAL
Volume824Issue:1
AbstractWe present a multiwavelength observational study of the NGC 2024 filament using infrared to submillimeter continuum and the NH3 (1, 1) and (2, 2) inversion transitions centered on FIR-3, the most massive core therein. FIR-3 is found to have no significant infrared point sources in the Spitzer/IRAC bands. But the NH3 kinetic temperature map shows a peak value at the core center with T-k = 25 K, which is significantly higher than the surrounding level (T-k = 15-19 K). Such internal heating signature without an infrared source suggests an ongoing core collapse possibly at a transition stage from first hydrostatic core (FHSC) to protostar. The eight dense cores in the filament have dust temperatures between 17.5 and 22 K. They are much cooler than the hot ridge (T-d similar to 55 K) around the central heating star IRS-2b. Comparison with a dust heating model suggests that the filament should have a distance of 3-5 pc from IRS-2b. This value is much larger than the spatial extent of the hot ridge, suggesting that the filament is spatially separated from the hot region along the line of sight.
KeywordIsm: Clouds Ism: Individual Objects (Ngc 2024, Orion) Ism: Molecules Stars: Formation Stars: Low-mass
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-637X/824/1/52
WOS Keyword1ST HYDROSTATIC CORE ; YOUNG STELLAR OBJECTS ; STAR-FORMING REGIONS ; GOULD BELT SURVEY ; DENSE CORES ; PROTOSTELLAR CORES ; MOLECULAR CLOUDS ; SPECTRAL ENERGY ; HIGH-RESOLUTION ; MAGNETIC-FIELD
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000377937300052
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16236
Collection太阳活动的多波段观测研究团组
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Chaoyang Dist Datun Rd A20, Beijing, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Ren, Zhiyuan,Li, Di. MASSIVE QUIESCENT CORES IN ORION. VI. THE INTERNAL STRUCTURES AND A CANDIDATE OF TRANSITING CORE IN NGC 2024 FILAMENT[J]. ASTROPHYSICAL JOURNAL,2016,824(1).
APA Ren, Zhiyuan,&Li, Di.(2016).MASSIVE QUIESCENT CORES IN ORION. VI. THE INTERNAL STRUCTURES AND A CANDIDATE OF TRANSITING CORE IN NGC 2024 FILAMENT.ASTROPHYSICAL JOURNAL,824(1).
MLA Ren, Zhiyuan,et al."MASSIVE QUIESCENT CORES IN ORION. VI. THE INTERNAL STRUCTURES AND A CANDIDATE OF TRANSITING CORE IN NGC 2024 FILAMENT".ASTROPHYSICAL JOURNAL 824.1(2016).
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