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WB89 520: A Small Isolated High Mass Star Forming Region Associated with an Extremely Metal-poor Nebula

  • Jun-Jie Wang (a1), Jing-Yao Hu (a1), Jian-Yan Wei (a1) and Leonardo Testi (a2)

Abstract

In this paper, by discussing and analyzing the observational results of near infrared imaging, optical spectroscopy and 12CO molecular line, together with IRAS and NVSS data, we conclude that WB89 520 is an UC HII region with a very young compact stellar cluster. The spectrum of the UC HII region shows that it is an extremely metal-poor nebula, which has the lowest line ratio of [NII]/Hα (∼ 1/56) discovered in the nebulae of our Galaxy until now. We give two possible explanations for the low metallicity.

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Copyright

References

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Blitz, L., 1987, Physical processes in interstellar clouds. Morfill, and Scholer, , eds., (Reidel: Dordrecht), p. 35.
Panagia, N., 1973, AJ, 78, 929.
Wang, J.-J., Qian, Z.-Y., Hu, J.-Y., Jiang, B.-W., Wang, G., 1993, Chin. Astron. Astrophys., 17, no. 1, 61.

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