RCW 36
Also called
Gum 20Coordinates: (265.08°, 1.4°)
[ Catalog | Explorer | SIMBAD ]
The HII region RCW 36 is ionised by a remarkably large and dense star cluster [BDB2003] G265.14+01.45 that is 2-3 million years old and is embedded in the Vela Molecular Ridge Cloud C (VMR C). The cluster has at least 350 members packed within a radius of 0.5 pc. The main ionising star for RCW 36 and the most massive cluster member, [MLG2003] IRS 34 68, is located towards the cluster centre and has a class of O8-O9.
Avedisova places RCW 36 in star formation region SFR 265.12+1.44 with 43 components, including 2 masers, 11 infrared sources, the globule FeSt 2-42 and the reflection nebulae Bran 210A-C.
The RCW 36 cluster can be seen in this 2MASS infrared image.
Avedisova places RCW 36 in star formation region SFR 265.12+1.44 with 43 components, including 2 masers, 11 infrared sources, the globule FeSt 2-42 and the reflection nebulae Bran 210A-C.
The RCW 36 cluster can be seen in this 2MASS infrared image.
The main ionising star for RCW 36 is [MLG2003] IRS 34 68.[1]
"The RCW 36 cluster has at least 350 members and a cluster radius of 0.5 pc, and the radial profile of the stellar surface number density can be well fitted with King profiles better than with 1/r profiles. In the central 0.1 pc x 0.1 pc region of the RCW 36 cluster, the stellar surface number density is approximately 3000 stars pc−2 This is much higher than most of the young clusters within 1 kpc of the Sun." Estimated to be 2-3 million years old.[2]
"The RCW 36 cluster has at least 350 members and a cluster radius of 0.5 pc, and the radial profile of the stellar surface number density can be well fitted with King profiles better than with 1/r profiles. In the central 0.1 pc x 0.1 pc region of the RCW 36 cluster, the stellar surface number density is approximately 3000 stars pc−2 This is much higher than most of the young clusters within 1 kpc of the Sun." Estimated to be 2-3 million years old.[2]
Notes
1. ^ Massi, F., Lorenzetti, D., & Giannini, T. (2003). "Star formation in the Vela molecular clouds. V. Young stellar objects and star clusters towards the C-cloud", Astronomy and Astrophysics, Vol. 399, 147-167. [2003A&A...399..147M]
2. ^ Baba, D., Nagata, T., Nagayama, T., et al. (2004). "Deep Near-Infrared Imaging toward the Vela Molecular Ridge C. I. A Remarkable Embedded Cluster in RCW 36", The Astrophysical Journal, Vol. 614, 818-826. [2004ApJ...614..818B]
Distance estimates
700 pc [2004ApJ...614..818B]Links
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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
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