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Sh 2-106

Emission nebula in the constellation Cygnus

Field	Value
name	Sh 2-106
image	Star-forming region S106 (captured by the Hubble Space Telescope).jpg
caption	Sharpless 2-106
type	H II region
subtype	bipolar nebula
epoch	J2000.0
ra	{{cite simbad
title	SH 2-106
accessdate	2013-01-13}}
dec
dist_ly	2,000
dist_pc	600
size_v	3′ × 3′
constellation	Cygnus
names	S106

Sh 2-106, also known as the Celestial Snow Angel, is an emission nebula and a star formation region in the constellation Cygnus. It is a H II region estimated to be around 2,000 light years (600 pc) from Earth, in an isolated area of the Milky Way.

In the center of the nebula is a young and massive star that emits jets of hot gas from its poles, forming the bipolar structure. Dust that surrounds the star is also ionized by it. The nebula spans about 2 light-years across.

Central star

The central star, a source of infrared radiation usually referred to as S106 IR or S106 IRS 4. It is a massive star, approximately 15 solar masses. Two jets of matter streaming from its poles heat surrounding matter to a temperature of around 10,000 °C. Dust that is not ionized by the star's jets reflect light from the star. With an estimated surface temperature of 37,000 K, it is classified as a type O8 star. It loses around 10−6 \begin{smallmatrix}M_\odot\end{smallmatrix} per year in solar winds, ejecting material at around 100 km/s.

Studies of images has revealed that the star-forming region has also created hundreds of low-mass brown dwarf stars and protostars.

References

NASA, ESA, and the Hubble Heritage Team (STScI/AURA). (6 Dec 2011). "Hubble Serves Up a Holiday Snow Angel".
(15 Dec 2011). "Young star rebels against its parent cloud".
(7 Nov 2011). "Star Forming Region S106".
(1 Sep 1983). "Radio images of the bipolar H II region S106". Astrophysical Journal, Part 1.
(Mar 2006). "Very Low Luminosity Young Cluster and the Luminosity and Mass Functions in S106". The Astronomical Journal.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

h-ii-regions emission-nebulae cygnus-(constellation) sharpless-objects star-forming-regions

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