RCW 95
Coordinates: (326.7°, 0.8°)
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The RCW catalog describes RCW 95 as a small bright nebula 3x2 arcminute in size. It is sometimes misidentified with the much larger and visually obscured infrared source IRAS 15408-5356.
Avedisova identifies no ionising star but places RCW 95 in star formation region SFR 326.61+0.82 with 21 components, including 9 masers and the HII region IRAS 15411-5352.
A 2009 paper identifies two ionising stars for the infrared source IRAS 15408-5356, which that paper identifies with RCW 95. These are the O5.5 V [BKH2005] 15408nr1410 and the O9.5 V [BKH2005] 15408nr1454. It gives a distance estimate of 1300 +/- 200 parsecs for the ionising cluster.
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. There is a massive infrared star cluster associated with RCW 95.
However, a look at the this Spitzer infrared image clearly shows that RCW 95 is associated with a small bubble (not a large cluster) that is above IRAS 15408-5356 and to the left of RCW 94. (The marker for the Avedisova star formation region associated with RCW 95 actually appears in between RCW 94 and RCW 95, not in the exact direction of the nebula itself.) The 2001 and 2009 papers mentioned above appear to misidentify RCW 95 with the much larger IRAS 15408-5356.
A search of SIMBAD around the actual coordinates of RCW 95 as given in the RCW catalog reveals that the O7 V star [OM80] 123 lies in this direction, so this might be the ionising star. The Georgelins give a distance estimate of 3300 parsecs for [OM80] 123.
Avedisova identifies no ionising star but places RCW 95 in star formation region SFR 326.61+0.82 with 21 components, including 9 masers and the HII region IRAS 15411-5352.
A 2009 paper identifies two ionising stars for the infrared source IRAS 15408-5356, which that paper identifies with RCW 95. These are the O5.5 V [BKH2005] 15408nr1410 and the O9.5 V [BKH2005] 15408nr1454. It gives a distance estimate of 1300 +/- 200 parsecs for the ionising cluster.
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. There is a massive infrared star cluster associated with RCW 95.
However, a look at the this Spitzer infrared image clearly shows that RCW 95 is associated with a small bubble (not a large cluster) that is above IRAS 15408-5356 and to the left of RCW 94. (The marker for the Avedisova star formation region associated with RCW 95 actually appears in between RCW 94 and RCW 95, not in the exact direction of the nebula itself.) The 2001 and 2009 papers mentioned above appear to misidentify RCW 95 with the much larger IRAS 15408-5356.
A search of SIMBAD around the actual coordinates of RCW 95 as given in the RCW catalog reveals that the O7 V star [OM80] 123 lies in this direction, so this might be the ionising star. The Georgelins give a distance estimate of 3300 parsecs for [OM80] 123.
Gives a distance estimate of 3300 parsecs for BDMW 123 = [OM80] 123 .[1]
Identifies two ionising stars, the O5.5 V [BKH2005] 15408nr1410 and the O9.5 V [BKH2005] 15408nr1454.[2]
RCW 94, RCW 95 and G326.65+0.59 are all part of the same complex at 3100 pc.[3]
There is a massive infrared star cluster associated with RCW 95.[4]
Identifies two ionising stars, the O5.5 V [BKH2005] 15408nr1410 and the O9.5 V [BKH2005] 15408nr1454.[2]
RCW 94, RCW 95 and G326.65+0.59 are all part of the same complex at 3100 pc.[3]
There is a massive infrared star cluster associated with RCW 95.[4]
Notes
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. ^ Roman-Lopes, A., Abraham, Z., Ortiz, R., et al. (2009). "GEMINI near-infrared spectroscopic observations of young massive stars embedded in molecular clouds", Monthly Notices of the Royal Astronomical Society, Vol. 394, 467-478. [2009MNRAS.394..467R]
3. ^ 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]
4. ^ Roman-Lopes, A. & Abraham, Z. (2004). "A Rich Star-forming Region in the Direction of RCW 95", The Astronomical Journal, Vol. 128, 2364-2373. [2004AJ....128.2364R]
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Most of the sources used to create these nebula descriptions are listed in the
notes section for each description. In some cases,
for example the Avedisova, Humphreys and Reed catalogs, the source is used extensively and is not listed in the
individual nebula descriptions. See this catalog overview
for more information on the catalogs and the general sources used
to create these descriptions and this introduction to HII regions
on the general history of this area of astronomy.
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The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.
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