Gum 34a and 34b both lie in a similar direction to RCW 54b and are filaments making up part of a shell surrounding the
Car OB2 association.
Gum 34b marks the forked structure above the ring surrounding
NGC 3503.
Gum 34a,b = RCW 54b are filaments making up part of a shell surrounding the Car OB2 association. They are ionised by stars in that association and this complex is located at a distance of 2900 pc. [
1]
Gum 34b marks the forked structure above the ring surrounding NGC 3503. [
2]
Notes
1. ^ Georgelin, Y. M., Russeil, D., Amram, P., et al. (2000). "Deep Hα survey
of the Milky Way. V. The l=289o to 295o area", Astronomy and
Astrophysics, Vol. 357, 308-324. [2000A&A...357..308G]
2. ^ Duronea, N. U., Vasquez, J., Cappa, C. E., et al. (2012). "NGC 3503 and
its molecular environment", Astronomy and Astrophysics, Vol. 537, A149.
[2012A&A...537A.149D]