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NGC 7129

NGC 7129
史匹哲太空望遠鏡拍攝的 NGC 7129
Credit: SIRTF/NASA.
觀測資料:曆元 J2000.0
赤经21h 42m 56s
赤纬+66° 6′ 12″
距離3,300 ly
视星等(V)11.5
視大小(V)7′ x 7′
星座仙王座
物理性質
半径3 ly [1]
絕對星等(V)未知
其他名稱OCL 240, LBN 497
參見:弥漫星云星雲列表

NGC 7129是一個位於仙王座反射星雲,距離地球約3300光年。一個年輕疏散星團將環繞在周圍的星雲照亮[2]。最近的研究認為該星團有超過130個年齡1百萬年以下的恆星[來源請求]。NGC 7129和附近的星團NGC 7142在天球上距離只有半度。

概要

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NGC 7129外觀像玫瑰花苞,而年輕的恆星輻射使該星雲擴張。分子雲中形狀特殊的氣泡在恆星誕生時就圍繞在旁邊。玫瑰紅的顏色來自於氣泡表面被來自年輕恆星的輻射加熱的塵埃。年輕恆星產生的紫外線和可見光被周圍的塵埃吸收並將塵埃加熱,使塵埃釋放出波長較長的紅外線並且被史匹哲太空望遠鏡拍攝。屬於假色的偏紅顏色代表富含碳氫化合物分子區域發射的紅外線輻射[來源請求]

氣泡外溫度低得多的分子雲大多無法被史匹哲拍攝到;但是三個接近星雲中心的極年輕恆星發射出超音速噴流進入雲氣。雲氣和噴流氣體互相碰撞使星雲中的一氧化碳分子被加熱,產生的複雜結構雲氣在史匹哲的影像上就像是玫瑰花苞的莖[來源請求]

圖集

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參考資料

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  1. ^ 距離 × sin( 直徑角= / 2 ) = 3 光年
  2. ^ NGC 7129 and NGC 7142. [2012-03-25]. (原始内容存档于2011-10-19). 

外部連結

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NGC 7129
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