Copyright:
ESA/Planck;
Acknowledgement:
M.-A. Miville-Desch�nes, CNRS �
IAS,
U. Paris-XI
原文:
What does the magnetic field of our Galaxy look like? It has long been known that a modest magnetic field pervades our Milky Way Galaxy because it is seen to align small dust grains that scatter background light. Only recently, however, has the Sun-orbiting Planck satellite made a high-resolution map of this field. Color coded, the 30-degree wide map confirms, among other things, that the Galaxy’s interstellar magnetism is strongest in the central disk. The revolution of charged gas around the Galactic center creates this magnetism, and it is hypothesized that viewed from the top, the Milky Way’s magnetic field would appear as a spiral swirling out from the center. What caused many of the details in this and similar Planck maps — and how magnetism in general affected our Galaxy’s evolution — will likely remain topics of research for years to come.
中文翻譯:
我們的銀河系的磁場長什麼樣子？長久以來，我們已經知道銀河系內存在著一個適度的磁場，因為它能夠使小的塵埃顆粒對背景光散射時進行排列。然而，最近環繞太陽運行的Planck衛星製作了一幅高分辨率的磁場地圖。這張色彩編碼的30度寬地圖確認了銀河系的星際磁場在中央盤面最強。圍繞銀河中心運行的帶電氣體創造了這一磁場，並且有假設認為，如果從上方觀察銀河系，銀河的磁場會呈現出從中心螺旋狀延伸的樣子。造成這些細節的原因以及評估磁場對銀河系演變的影響，未來幾年還會是研究的主題。
#銀河系 #磁場 #Planck衛星 #科學探索 #宇宙奧秘 #星際磁場 #銀河中心 #螺旋結構 #空間研究
來源:NASA每日圖片
