NGC 2361
It is also catalogued as Sharpless 2-298 and Gum 4.
The nebula has an overall bubble shape, but with complex filamentary structures. The nebula contains several hundred solar masses of ionised material, plus several thousand more of unionised gas. It is largely interstellar material swept up by winds from the central star, although some material does appear to be enriched with the products of fusion and is likely to come directly from the star. The expansion rate of different portions of the nebula varies from 10 km/s to at least 30 km/s, leading to age estimates of 78,500 - 236,000 years. The nebula has been studied at radio and x-ray wavelengths, but it is still unclear whether it was produced at the class O main sequence stage of development, as a red supergiant, luminous blue variable, or mainly as a Wolf-Rayet star.
NGC 2361 is a bright knot of nebulosity on one edge of the central ring of NGC 2359.
References
- ^ "NGC 2359". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 October 2012.
- ^ Zhekov, S. A. (2014). "X-rays from wind-blown bubbles: An XMM-Newton detection of NGC 2359". Monthly Notices of the Royal Astronomical Society. 443 (1): 12–18. arXiv:1406.2463. Bibcode:2014MNRAS.443...12Z. doi:10.1093/mnras/stu1138.
- ^ SEDS: NGC 2359 Archived 2010-03-26 at the Wayback Machine
- ^ "The Gum Catalog". Galaxymap.org. Archived from the original on 2013-07-16. Retrieved 2013-10-06.
- ^ Cappa, C. E.; Goss, W. M.; Niemela, V. S.; Ostrov, P. G. (1999). "A Study of Neutral and Ionized Gas of the Wolf-Rayet Ring Nebula NGC 2359". The Astronomical Journal. 118 (2): 948. Bibcode:1999AJ....118..948C. doi:10.1086/300995. S2CID 123709946.
External links
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)