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The expansion of H ii regions can trigger the formation of stars. An overdensity of young stellar objects is observed at the edges of H ii regions but the mechanisms that give rise to this phenomenon are not clearly identified. Moreover, it is difficult to establish a causal link between H ii -region expansion and the star formation observed at the edges of these regions. A clear age gradient observed in the spatial distribution of young sources in the surrounding might be a strong argument in favor of triggering.

Source Citation

Figueira, M., Zavagno, A., Deharveng, L., Anderson, L. D. (2017). Star Formation Towards The Galactic H Ii Region Rcw 120 - Herschel Observations Of Compact Sources. Astronomy and Astrophysics, 600, A93.



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