亲爱的公主病
潮友社，疏解企业青年来相聚_我的网站
A | “集合！今晚潮友社召集两桌潮友，‘快乐星球’的居民们赶快接龙报名。
Chinese astronomers have discovered that the Milky Way is not a simple, smoothly warped disk, but contains widespread "wrinkle-like" structures resembling ripples on a water surface, providing new clues to understanding the galaxy's 3D structure and evolutionary history.
The discovery was made by a research team from the Purple Mountain Observatory (PMO) under the Chinese Academy of Sciences, using data from the "Milky Way Imaging Scroll Painting" (MWISP) survey. The findings were published online titled "Widespread corrugations superimposed on the Galactic warp in the outer CO disk" in the journal Nature Astronomy on August 7.
For decades, astronomers have known that the Milky Way's disk is not perfectly flat. Instead, its outer regions are slightly bent upward on one side and downward on the other - a structure known as a galactic warp.
However, the latest study shows that this large-scale bending is not the whole story. Smaller-scale vertical fluctuations are also embedded within the warped disk, creating a more complicated 3D structure.
"In many illustrations and in the public imagination, the Milky Way looks like a flat vinyl record," Sun Yan, associate researcher at PMO and the first author of the paper, told the Global Times on Tuesday. "In reality, the outer part of the Milky Way is more like a record that has been heated and deformed, with one side lifted and the other side lowered. That is the warp. On top of this large-scale deformation, there are additional smaller waves, which we call corrugations," Sun explained.
Using a more everyday analogy, Sun compared the Milky Way's structure to a sea surface. The warp is like a large swell that changes the overall height of the ocean, while corrugations are smaller waves superimposed on that swell.
"The two structures exist together. In our data analysis, we first removed the large-scale warp model, which allowed us to reveal the smaller wave-like patterns hidden underneath," Sun said.
The research focused on the Milky Way's outer gas disk rather than the more familiar stellar disk. According to Sun, cold molecular gas and stars provide two complementary ways to study the galaxy.
"Molecular gas is a sensitive probe for studying the vertical structure and dynamics of the galactic disk because it is concentrated near the disk plane and responds strongly to disturbances," she said.
Molecular gas is also the raw material for star formation, meaning its distribution is closely connected with the formation of young stars. The researchers traced this gas through carbon monoxide (CO) emission, which can penetrate regions obscured by interstellar dust and provide a different perspective from optical observations of stars.
The breakthrough was made possible by the MWISP survey, conducted using China's 13.7-meter millimeter-wave telescope.
"MWISP can be understood as giving the Milky Way a large-scale medical examination using millimeter-wave observations," Sun said.
Previous CO surveys were limited in sensitivity and coverage, making it difficult to accurately study the distant outer regions of the galaxy. In contrast, the latest study identified more than 30,000 molecular cloud samples, covering about half of the Milky Way's outer disk and extending to a distance of about 26 kiloparsecs from the Galactic center.
With such a large dataset, researchers were able to first establish a model of the overall warp and then separate subtle structures from the background. The newly identified corrugations have radial wavelengths of about 3.9-7.9 kiloparsecs and vertical amplitudes of about 100-200 parsecs.
The study also identified a corrugation structure extending about 40 kiloparsecs in azimuth at a distance of around 12.7 kiloparsecs from the Galactic center. In some spiral arm regions, vertical displacements can reach approximately 200 parsecs.
The researchers believe these large-scale vertical fluctuations are likely related to "bending waves" triggered by external gravitational disturbances, suggesting that the Milky Way might have experienced more complex interactions during its evolutionary history.
Although the newly discovered structures sound dramatic, they do not have any direct impact on Earth or the solar system. "Humans cannot directly sense these corrugations," Sun said. "Their scales reach thousands or even tens of thousands of light-years, and even if these structures are evolving, such changes would not be directly perceptible on human timescales."
The study focuses on the outer disk of the Milky Way and does not include the region around the solar system. "There is currently no evidence that these structures have any observable influence on Earth's environment," Sun said.
Instead, their significance lies in what they reveal about the past. Like geological layers recording Earth's history, these galactic structures preserve traces of the Milky Way's evolutionary journey, the researchers explained.
Researchers said future studies combining more precise motion measurements and numerical simulations could further reveal the origins of these structures and their role in the long-term evolution of the Milky Way.
。”8月3日，雄安新区容东片区定安社区潮友社青年社团微信群——“快乐星球”群里一声招呼，不到5分钟，桌游和狼人杀名额就被抢光。这个叫潮友社的青年社团，已成为雄安新区青年人钟情的社交港湾。潮友社诞生于一次入户调查。去年春天，定安社区工作人员走访居民，一些北京疏解企业的青年住户提出：大家渴望在下班后有一个能缷下疲惫、交到朋友的“社区客厅”。
B | 起初，工作人员只是在社区群里约着大家一起玩儿桌游，不料一次邀约竟来了20多人，社区不得不临时协调场地。这次相聚让大家发现：大批从北京疏解而来的青年，下班后缺少社交渠道，难寻玩伴。一边是疏解企业青年需求迫切，一边是社区场地闲置，两相契合，潮友社这个常态化青年社团应运而生。在社区的全程帮助下，潮友社2025年5月正式备案。起步之初仅有十余人的小规模桌游局，如今已成为拥有300多群友、每周都有活动的成熟社区青年组织。截至目前，定安社区潮友社累计开展各类活动182场，储备桌游品类50余种，涵盖剧本杀、狼人杀、策略经营、合作解谜等多种形式，活动排期紧凑，几乎隔日便有专场，活动名额常常一经发布便迅速报满。不同于普通线下桌游聚会，潮友社跳出纯娱乐局限，走出一条“娱乐+宣教”的特色路子。社团打造多款特色主题桌游剧本：依托本地红色历史资源创作党建主题剧本，引导青年们在角色扮演中沉浸式感悟革命精神；结合真实案例改编法治剧本，引导大家在推理探案的过程中，潜移默化读懂民法典相关知识。
C | “社团能够活力满满，核心在于‘社区搭台、青年唱戏’的自主运营模式。”容东片区定安社区党总支书记郭俊媛说，社区免费提供活动场地、配套基础保障，而活动策划、人员招募、现场主持、社群维护、新人引导等全部日常事务，均由两名青年主理人和多名青年志愿者负责。这些运营者身份不同，有互联网程序员，有自由职业者。如今，潮友社已成为定安社区青年文化的亮眼名片。（日报记者 刘光昱）。
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