W 5 :恆星形成的支柱
W5: Pillars of Star Formation

來源::
Francesco Antonucci|發表日期:2025-06-23
恆星是如何形成的?美國國家航空航天局(NASA)的寬視場紅外巡天探測器(WISE,後來的NEOWISE)衛星拍攝的W 5 恆星形成區域的紅外影像提供了清晰的線索,表明空腔中心附近的大質量恆星比邊緣附近的恆星更老。 其中一個可能的原因是,中心的老恆星實際上觸發了邊緣年輕恆星的形成。 當熱的外流氣體將較冷的氣體壓縮成密度足以在引力作用下收縮成恆星的氣結時,就會觸發恆星的形成。 在這張具有科學色彩的紅外影像中,熾熱的外流氣體緩慢蒸發留下的壯觀氣柱提供了進一步的視覺線索。W 5 也被稱為 Westerhout 5 (W 5 )和 IC 1848 。 這些星雲與 IC 1805 一起構成了一個複雜的恆星形成區域,被人們稱為 "心和靈魂星雲"。這張特寫圖片突出顯示了 W 5 的一部分,面積約 2000 光年,其中恆星形成柱非常豐富。 W 5 位於仙后座方向大約 6500 光年之外。 APOD 30 歲了!..:明天(週二)下午 7 點在愛爾蘭科克市舉辦免費公開講座
原文:How do stars form? Images of the star forming region W5 like those in the infrared by NASA's Wide Field Infrared Survey Explorer (WISE, later NEOWISE) satellite provide clear clues with indications that massive stars near the center of empty cavities are older than stars near the edges. A likely reason for this is that the older stars in the center are actually triggering the formation of the younger edge stars. The triggered star formation occurs when hot outflowing gas compresses cooler gas into knots dense enough to gravitationally contract into stars. In the featured scientifically colored infrared image, spectacular pillars left slowly evaporating from the hot outflowing gas provide further visual clues. W5 is also known as Westerhout 5 (W5) and IC 1848. Together with IC 1805, the nebulas form a complex region of star formation popularly dubbed the Heart and Soul Nebulas. The featured image highlights a part of W5 spanning about 2,000 light years that is rich in star forming pillars. W5 lies about 6,500 light years away toward the constellation of Cassiopeia. APOD Turns 30!: Free public lecture in Cork, Ireland tomorrow (Tuesday) at 7 pm
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。