Xu Jinlong1; Wang Junjie1; Ning Changchun2; Zhang Chuanpeng1
Source Publicationresearchinastronomyandastrophysics
AbstractWe investigate 25 HⅡ regions that show bubble morphology in ~(13)CO(1–0) and infrared data, to search for quantitative evidence of triggered star formation by processes described by the collect and collapse (CC) and radiatively driven implosion (RDI) models. These HⅡ regions display the morphology of a complete or partial bubble at 8 μm, and are all associated with the molecular clouds that surround them. We found that the electron temperature ranges from 5627 K to 6839 K in these HⅡ regions, and the average electron temperature is 6083 K. The age of these HⅡ regions is from 3.0×10~5 yr to 1.7×10~6 yr, and the mean age is 7.7×10~5 yr. Based on the morphology of the associated molecular clouds, we divide these HⅡ regions into three groups, which may support CC and RDI models. We select 23 young IRAS sources which have an infrared luminosity of >10~3L_⊙ in 19 HⅡ regions. In addition, we identify some young stellar objects (including Class I sources), which are only concentrated in HⅡ regions G29.007+0.076, G44.339–0.827 and G47.028+0.232. The polycyclic aromatic hydrocarbon emissions of the three HⅡ regions all show a cometary globule. Comparing the age of each HⅡ region with the characteristic timescales for star formation, we suggest that the three HⅡ regions can trigger clustered star formation by an RDI process. In addition, we detect seven molecular outflows in the five HⅡ regions for the first time. These outflow sources may be triggered by the corresponding HⅡ regions.
Document Type期刊论文
2.NAOC-TU Joint Center for Astrophysics
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu Jinlong,Wang Junjie,Ning Changchun,et al. multiwavelengthstudyoftriggeredstarformationaround25hregions[J]. researchinastronomyandastrophysics,2014,14(1):47.
APA Xu Jinlong,Wang Junjie,Ning Changchun,&Zhang Chuanpeng.(2014).multiwavelengthstudyoftriggeredstarformationaround25hregions.researchinastronomyandastrophysics,14(1),47.
MLA Xu Jinlong,et al."multiwavelengthstudyoftriggeredstarformationaround25hregions".researchinastronomyandastrophysics 14.1(2014):47.
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