Gum_65

Sh2-9

Sh2-9

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Sh2-9, also known as Gum 65, is combination emission and reflection nebula in the Scorpius constellation, surrounding the multiple star system Sigma Scorpii. Sigma Scorpii is 1° to the northwest of Messier 4,[1][2] and the nebula can be easily seen with small telescopes.

Quick Facts Emission nebula, Observation data: J2000.0 epoch ...

Sharpless 9 is a red emission nebula that surrounds the star Sigma Scorpii.[2] It is thought the star Sigma Scorpii, a variable giant star, is ionizing this region.[3] It is also recorded as reflection nebula C130.[4]

This region is noted as both an emission and reflection nebula, although sometimes only one aspect is noted.[5][2]

The magnitude 1.1 Antares is 2° to the southeast of this nebula.[2]

One of strongest 2.3 GHz sources in the region coincides with Sharpless 9.[4]

There is a radio source on the edge, and it has been proposed that this is because there is a collision between this nebula and the dark nebula Kh 527.[4]

Catalogs

Examples:[4]

References

  1. [1]
    "SH2-9". SharplessCatalog.Com. Sharpless Catalog.
  2. [2]
    Abrams, Bernard; Stecker, Michael (2012-12-06). Structures in Space: Hidden Secrets of the Deep Sky. Springer Science & Business Media. ISBN 9781447104414.
  3. [3]
    "The Gum Catalog". galaxymap.org. Retrieved 2019-10-30.
  4. [4]
    E. E. Baart; et al. (Dec 1980). "A 2.3 GHz radio continuum map of the upper Scorpio region". Astronomy and Astrophysics. 92: 156. Bibcode:1980A&A....92..156B.
  5. [5]
    Gilmour, Jess K. (2003). The Practical Astronomer's Deep-sky Companion. Springer Science & Business Media. ISBN 9781852334741.


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