三角座星系
Triangulum galaxy viewed by Planck
摘要：
我们使用普朗克数据来研究M33星系，并发现其短轴投影到天空平面上的实质性温度不对称。这种温度的不对称性与HI速度场在21厘米，至少在0.5度的银河系中心的距离，它被发现从星系中心延伸到约3度。我们的结论是，所揭示的效果，即温度不对称性和它的扩展，意味着我们检测到的差异旋转的M33星系和它的扩展重子晕。
英文摘要：
We used Planck data to study the M33 galaxy and find a substantial temperature asymmetry with respect to its minor axis projected onto the sky plane. This temperature asymmetry correlates well with the HI velocity field at 21 cm, at least within a galactocentric distance of 0.5 degree, and it is found to extend up to about 3 degrees from the galaxy center. We conclude that the revealed effect, that is, the temperature asymmetry and its extension, implies that we detected the differential rotation of the M33 galaxy and of its extended baryonic halo.
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