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STAR FORMATION ASSOCIATED WITH THE SUPERNOVA REMNANT IC443
Xu, Jin-Long1,2; Wang, Jun-Jie1,2; Miller, Martin3
2011-02-01
Source PublicationASTROPHYSICAL JOURNAL
Volume727Issue:2
AbstractWe have performed submillimeter and millimeter observations in CO lines toward supernova remnant (SNR) IC443. The CO molecular shell coincides well with the partial shell of the SNR detected in radio continuum observations. Broad emission lines and three 1720 MHz OH masers were detected in the CO molecular shell. The present observations have provided further evidence in support of the interaction between the SNR and the adjoining molecular clouds (MCs). The total mass of the MCs is 9.26 x 10(3) M-circle dot. The integrated CO line intensity ratio (RICO(3-2)/ICO(2-1)) for the whole MC is between 0.79 and 3.40. The average value is 1.58, which is much higher than previous measurements of individual Galactic MCs. Higher line ratios imply that shocks have driven into the MCs. We conclude that high RICO(3-2)/ICO(2-1) is identified as a good signature of the SNR-MC interacting system. Based on the IRAS Point Source Catalog and the Two Micron All Sky Survey near-infrared database, 12 protostellar object and 1666 young stellar object (YSO) candidates (including 154 classical T Tauri stars and 419 Herbig Ae/Be stars) are selected. In the interacting regions, the significant enhancement of the number of protostellar objects and YSOs indicates the presence of some recently formed stars. After comparing the characteristic timescales of star formation with the age of IC443, we conclude that the protostellar objects and YSO candidates are not triggered by IC443. For the age of the stellar winds shell, we have performed our calculation on the basis of a stellar wind shell expansion model. The results and analysis suggest that the formation of these stars may be triggered by the stellar winds of the IC443 progenitor.
KeywordIsm: Clouds Ism: Individual Objects (Ic443) Ism: Molecules Ism: Supernova Remnants Stars: Formation
DOI10.1088/0004-637X/727/2/81
Indexed BySCI
Language英语
WOS IDWOS:000286662000020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8090
Collection射电天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China
3.Univ Cologne, Inst Phys, D-50937 Cologne, Germany
Recommended Citation
GB/T 7714
Xu, Jin-Long,Wang, Jun-Jie,Miller, Martin. STAR FORMATION ASSOCIATED WITH THE SUPERNOVA REMNANT IC443[J]. ASTROPHYSICAL JOURNAL,2011,727(2).
APA Xu, Jin-Long,Wang, Jun-Jie,&Miller, Martin.(2011).STAR FORMATION ASSOCIATED WITH THE SUPERNOVA REMNANT IC443.ASTROPHYSICAL JOURNAL,727(2).
MLA Xu, Jin-Long,et al."STAR FORMATION ASSOCIATED WITH THE SUPERNOVA REMNANT IC443".ASTROPHYSICAL JOURNAL 727.2(2011).
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