Gum Nebula - Nebula - astro.wikisort.org

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The Gum Nebula (Gum 12) is an emission nebula that extends across 36° in the southern constellations Vela and Puppis. It lies approximately 450 parsecs from the Earth.[1] Hard to distinguish, it was widely believed to be the greatly expanded (and still expanding) remains of a supernova that took place about a million years ago. More recent research suggests it may be an evolved H II region. It contains the 11,000-year-old Vela Supernova Remnant, along with the Vela Pulsar.

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Gum Nebula
Supernova remnant

Observation data: J2000.0 epoch
Right ascension	08^h 00^m
Declination	−43° 00′
Distance	1470 ly (450 pc)
Apparent magnitude (V)	+12 (infrared only)
Constellation	Vela
Physical characteristics
Absolute magnitude (V)	3.73 (infrared)

Designations	Gum 12
See also: Lists of nebulae

The Gum Nebula contains about 32 cometary globules.[2] These dense cloud cores are subject to such strong radiation from O-type stars γ² Vel and ζ Pup and formerly the progenitor of the Vela Supernova Remnant that the cloud cores evaporate away from the hot stars into comet-like shapes. Like ordinary Bok globules, cometary globules are believed to be associated with star formation.[3]

It is named after its discoverer, the Australian astronomer Colin Stanley Gum (1924–1960). Gum had published his findings in 1955 in a work called A study of diffuse southern H-alpha nebulae (see Gum catalog).

The Gum nebula was photographed during Apollo 16 while the command module was in the double umbra of the Sun and Earth, using high-speed Kodak film.[4]

One of 4 images of the Gum Nebula photographed by Apollo 16 in 1972. AS16-127-20024.

Popular culture

The Gum Nebula is explored by the crew of the Starship Titan in the Star Trek novel Orion's Hounds.[5]

References

Graham, J.A., 1986. Objects associated with low-mass star formation in the Gum nebula. The Astrophysical Journal, 302, pp.352-362.
Zealey, W. J., Z. Ninkov, E. Rice, M. Hartley, & S. B. Tritton. 1983, ApL, 23, 119.
Reipurth, B. 1983, A&A, 117, 183. Star formation in BOK globules and low-mass clouds. "I - The cometary globules in the GUM Nebula."
Apollo 16 Preliminary Science Report (NASA SP-315), 1972. Chapter 31, Astronomical Photography, Part A, Gum Nebula, Glactic Cluster, and Zodiacal Light Photography, by R. D. Mercer, L. Dunkelman, and Thomas K. Mattingly.
Bennett, Christopher (2005-12-27). Orion's Hounds. Pocket Books. ISBN 141650950X.

External links

Wikimedia Commons has media related to Gum 12.

Gum Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
APOD: Gum Nebula, with mouse over (2009.08.22)
Galaxy Map: Entry for Gum 12 in the Gum Catalog
Galaxy Map: Detail chart for the Gould Belt (showing the location of Gum 12 relative to the sun)
Encyclopedia of Science: Entry for the Gum Nebula (erroneously called Gum 56)
SouthernSkyPhoto.com

v t e Gum Catalog
Colin Stanley Gum
Gum 1 Gum 2 Gum 3 Gum 4 Gum 5 Gum 6 Gum 7 Gum 8 Gum 9 Gum 10 Gum 12 Gum 13 Gum 14 Gum 15 Gum 16 Gum 17 Gum 18 Gum 19 Gum 20 Gum 21 Gum 22 Gum 23 Gum 24 Gum 25 Gum 26 Gum 27 Gum 28 Gum 29 Gum 30 Gum 31 Gum 32 Gum 33 Gum 34 Gum 35 Gum 36 Gum 37 Gum 38 Gum 39 Gum 40 Gum 41 Gum 42 Gum 43 Gum 44 Gum 45 Gum 46 Gum 47 Gum 48 Gum 49 Gum 50 Gum 51 Gum 52 Gum 53 Gum 54 Gum 55 Gum 56 Gum 57 Gum 58 Gum 59 Gum 60 Gum 61 Gum 62 Gum 63 Gum 64 Gum 65 Gum 66 Gum 67 Gum 68 Gum 69 Gum 70 Gum 71 Gum 72 Gum 73 Gum 74 Gum 75 Gum 76 Gum 77 Gum 78 Gum 79 Gum 80 Gum 81 Gum 82 Gum 83 Gum 84 Gum 85
See also: Gum Nebula

На других языках

[de] Gum-Nebel

Der Gum-Nebel (Gum 12) ist ein Emissionsnebel, der sich in den südlichen Sternbildern Vela und Puppis befindet. Mit einem scheinbaren Durchmesser von 40° ist er der Nebel mit der größten Winkelausdehnung am Nachthimmel.

- [en] Gum Nebula

[es] Nebulosa Gum

La nebulosa Gum (también conocida como Gum 12 o nebulosa de Gum) es una nebulosa de emisión que se extiende a través de 36° en las constelaciones del sur Vela y Puppis. Se encuentra aproximadamente a 350 parsecs de la Tierra. Difícil de distinguir, se creía ampliamente que se trataba de los restos muy expandidos (y aún en expansión) de una supernova que tuvo lugar hace aproximadamente un millón de años. Investigaciones más recientes sugieren que puede ser una región H II evolucionada.

[ru] Туманность Гама

Туманность Гама (Gum 12) — сверхпузырь, остаток сверхновой, основная часть которого располагается в созвездиях Кормы и Парусов (бывшее созвездие Корабль Арго). Расстояние до центра туманности оценивается в 400 парсек. Туманность Гама является одной из наиболее обширных туманностей звёздного неба: внешние её части захватывают также созвездия Киля, Компаса, Насоса, Большого Пса, Голубя. Предполагается, что сверхновая, положившая начало туманности, взорвалась 2,6 млн лет назад.

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