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           IC5067 ペリカン星雲 The bubble nebula in Cassiopeia

バブル星雲  

 質量が太陽の45倍と言われる巨大・活発な星からの恒星風で周囲の星間ガスを圧迫しシャボン玉ができたとされていますが、少しその様子を調べてみました。
  

Telescope: Takahashi TOA 150 fL=1100mm F7.3
Camera : Bitran BJ53L -20 deg.
Exposure : Ha,O3,S2 2o'x5 each  total 300min.

   
 2016年4月22日 APODのハッブル鏡の画像は衝撃的とも言えるほど素晴らしく、ヴェールを全て取り払ってくれたようなものでした。April 22,2016 APOD NASA etc.
 
Reffered to;
 Hubble Heritage / Hubble Sees a Star 'Inflating'a Giant Bubble /  
 the article of Apr.21.2016
 The bubble with 7 light-years diameter lies 7,100 light-years away from us. The huge star blowing up this bubble is 45 times more massive than our sun. Gas on the star is extremely hot and emitted away as a "stellar wind" with its velocity nearly 2000km/sec. This flow sweeps up the interstellar gas in front of it, forming the outer edge of the bubble like a snowplow pushes up snow.
 As the surface of the bubble's shell expands outward, it collides dense regions of some side of cold gas, asymmetry phenomenon appears while making the star to be off-center from the bubble, with its location in the 10 o'clock position in the bubble as pointed by
arrow-'A'.
 'B'
seems to be an arc produced by collision between the gas and the wind. 
 Dense pillars of molecular cloud with dust,
'D', appear at the upper left of the bubble, and more "fingers" can be seen behind the bubble 'C'.
The pillars are similar to the "Pillars of Creation" in the Eagle Nebula. The Bubble Nebula's pillars are being illuminated by the strong ultraviolet radiation from the brilliant star inside of the bubble.
 The massive and extremely bright star is considered to be short-lived star that has lost most of its outer hydrogen and is now fusing helium into heavier elements. The star is about 4 million years old, and in 10 million to 20 million years, it will likely detonate as a supernova.


 
 自分の画像でどうか…、Aがバブル製造星、Bは(モヤーッと判別困難ですが)恒星風でできたものでハッブル画像では筋状の模様のようにクリアに捉えられています。Cは濃い分子雲が紫外線や恒星風の影響で輝いている状態。Dも濃い分子雲だが恒星風は未到達で、強烈紫外線で輝いている状態。
 また、この大質量星は誕生後まだ僅か400万年、寿命は1〜2千万年と極めて短く超新星爆発を起すだろうと見られています。



もどるボタン M20 Trifid 三裂星雲 - お薦め記事目次ペイジ 進むボタン

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NGC7635 Bubble Nebula

カシオペア座
距離 7100光年
 
Consteration: Cassiopeia
Distance: 7100 Light-years



The Bubble Nebula was discovered in 1787 by William Herschel, a prominent British astronomer.





  

 







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