Avedisova gives no ionising star but places RCW 94 in star formation region SFR 326.16+0.89
with 17 components, including 3 masers and the infrared HII regions IRAS 15384-5348
and IRAS 15394-5358
. A 1973 paper points out that the OB star LSS 3386
is located towards the centre of RCW 94. Cameron Reed says that this is an O6 I supergiant. A 2001 paper gives the class as O9 III.
The Georgelins also associate LSS 3386 with RCW 94, and give a class of O6 and a distance of 2300 parsecs. They place RCW 94 and RCW 95 at the same distance of 2300 parsecs, implying but not explicitly stating that it is the ionising star.
According to a 2001 paper by McClure-Griffiths and colleagues, RCW 94, RCW 95 and G326.65+0.59 are all part of the same complex at 3100 pc. RCW 94 is surrounded by an expanding HI shell and a giant molecular cloud.
You can see the large bubble around RCW 94 in this Spitzer infrared image
The Georgelins also associate LSS 3386 with RCW 94, and give a class of O6 and a distance of 2300 parsecs.[1
LSS 3386 is O9 III.[2
LSS 3386 occurs towards the centre of RCW 94.[3
RCW 94, RCW 95 and G326.65+0.59 are all part of the same complex at 3100 pc. RCW 94 is surrounded by an expanding HI shell and a giant molecular cloud.[4
1. ^ Georgelin, Y. M., Amram, P., Georgelin, Y. P., et al. (1994). "Deep Hα
survey of the Milky Way. II. The l=328deg area.", Astronomy and
Astrophysics Supplement Series, Vol. 108, 513-532. [1994A&AS..108..513G]
2. ^ Patriarchi, P., Morbidelli, L., Perinotto, M., et al. (2001).
"Determination of R_V towards galactic O stars", Astronomy and
Astrophysics, Vol. 372, 644-650. [2001A&A...372..644P]
3. ^ Johnson, Hugh M. (1973). "Luminous Stars in the Cores of H II Regions",
Publications of the Astronomical Society of the Pacific, Vol. 85, 586.
4. ^ McClure-Griffiths, N. M., Green, A. J., Dickey, John M., et al. (2001).
"The Southern Galactic Plane Survey: The Test Region", The Astrophysical
Journal, Vol. 551, 394-412. [2001ApJ...551..394M]