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Stock 16 is a very young Galactic open cluster in the H II region RCW 75 (= Gum 48a). This region lies at the end of an "elephant trunk" shaped molecular cloud and may be a region with triggered star formation. The primary ionizing source for the H II region is the star HD 115455, with spectral type O7.5 III.
| Stock 16 | |
|---|---|
 ESO VST image of the most massive stars in Stock 16 in the upper right and some nebulosity of RCW 75 on the lower left | |
| Observation data (J2000 epoch) | |
| Right ascension | 13h 19m 29s[1] |
| Declination | −62° 38.0′[1] |
| Distance | 6200 ly (1900 pc) |
| Apparent dimensions (V) | 18′ x 13′ |
| Physical characteristics | |
| Estimated age | 4–6 Myr |
| Other designations | C 1315-623 |
| Associations | |
| Constellation | Centaurus |
RCW 75 is also Gum 48a.[2]
In Turner's 1985 paper The young open cluster Stock 16: an example of star formation in an elephant trunk? it was proposed the Stock 16 cluster was an example of star formation.[3] The study included UBV photometry of over thirty stars in the cluster.[3]
It is the 16th object in Jürgen Stock's catalogue of open clusters.
References
edit- ^ a b "Cl Stock 16". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 22, 2015.
- ^ Lang, Kenneth R. (2012-12-06). Astrophysical Data: Planets and Stars. Springer Science & Business Media. ISBN 978-1-4684-0640-5.
- ^ a b Turner, David Gerald (1985-05-01). "The young open cluster Stock 16: an example of star formation in an elephant trunk?". The Astrophysical Journal. 292: 148. doi:10.1086/163140. ISSN 0004-637X.
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