Ai Mei; Zhu Ming; Xiao Li; Su Hongquan
Source Publicationresearchinastronomyandastrophysics
AbstractUltra compact HII (UCHII) G25.4NW is a bright IR source in the region of the inner Galaxy. New HI images from the Very Large Array Galactic Plane Survey show clear absorption features associated with the UCHII region up to 95 km s(-1), and there are no other absorptions up to the tangential velocity. This reveals that G25.4NW has a near-side distance of 5.7 kpc, and it is located in the region of the inner Galactic molecular ring. Using the new distance, the bolometric luminosity of G25.4NW is estimated as 10(5.6) L-circle dot, which corresponds to an O6 star. It contains 460 M-circle dot of ionized gas. A high-resolution (CO)-C-13 image from the Galactic Ring Survey reveals that G25.4NW is part of a more extended star-forming complex with about 10(4) M-circle dot of molecular gas.
Funding Project[National Natural Science Foundation of China] ; [National Basic Research Program of China (973 program)] ; [NAOC] ; [Chinese Academy of Sciences]
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ai Mei,Zhu Ming,Xiao Li,et al. propertiesoftheuchiiregiong254nwanditsassociatedmolecularcloud[J]. researchinastronomyandastrophysics,2013,13(8):935.
APA Ai Mei,Zhu Ming,Xiao Li,&Su Hongquan.(2013).propertiesoftheuchiiregiong254nwanditsassociatedmolecularcloud.researchinastronomyandastrophysics,13(8),935.
MLA Ai Mei,et al."propertiesoftheuchiiregiong254nwanditsassociatedmolecularcloud".researchinastronomyandastrophysics 13.8(2013):935.
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