This HII region has been examined in detail in papers by Zavagno et.al. [1
] and Deharveng et.al. [2
], who found significant new star formation underway at the edges of the bubble.
RCW 120 was the subject of one of the first published studies based on images from the Herschel infrared space telescope
According to Avedisova, RCW 120 is ionised by the O8 V star CD -38 11636 (CGO 439) and the B2 V star VDBH 84B
. She places the nebula in the star formation region SFR 348.26+0.47
along with 3 masers and the radio HII region [CH87] 347.386+0.266
A 2005 study refers to the Avedisova paper and gives the class of the main ionising star as O6 V, so the star may be hotter than Avedisova suggests.[4
You can view an interesting multiwavelength image of RCW 120
and see the Spitzer infrared view here
1. ^ Zavagno, A., Pomarès, M., Deharveng, L., et al. (2007). "Triggered star
formation on the borders of the Galactic H ii region RCW 120", Astronomy
and Astrophysics, Vol. 472, 835-846. [2007A&A...472..835Z]
2. ^ Deharveng, L., Zavagno, A., Schuller, F., et al. (2009). "Star formation
around RCW 120, the perfect bubble", Astronomy and Astrophysics, Vol. 496,
3. ^ Zavagno, A., Russeil, D., Motte, F., et al. (2010). "Star formation
triggered by the Galactic H II region RCW 120. First results from the
Herschel Space Observatory", Astronomy and Astrophysics, Vol. 518, L81.
4. ^ Deharveng, L., Zavagno, A., & Caplan, J. (2005). "Triggered massive-star
formation on the borders of Galactic H II regions. I. A search for
``collect and collapse'' candidates", Astronomy and Astrophysics, Vol.
433, 565-577. [2005A&A...433..565D]