弱相互作用大质量粒子（WIMP）是什么？
What is a WIMP (weakly interacting massive particle)?
WIMP是暗物质的候选粒子之一，假设它通过弱核力和引力相互作用、质量较大且运动缓慢。大量地下探测器正试图捕捉它与普通物质之间极罕见的碰撞。
A WIMP is a leading dark-matter candidate, hypothesized to interact via the weak nuclear force and gravity, with sizable mass and slow motion. Many underground detectors are trying to catch its exceedingly rare collisions with ordinary matter.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#WIMP #暗物质候选 #弱相互作用 #地下探测
科学家如何尝试直接探测“弱相互作用大质量粒子”（WIMPs）？
How do scientists try to directly detect WIMPs?
WIMPs 是暗物质的主流候选粒子之一，只通过弱核力与引力相互作用。地下实验如 XENON 和 LZ 将超纯净的液氙置于深处以屏蔽宇宙射线，静静等待极罕见的 WIMP 撞击原子核事件，至今尚未确证其存在。
WIMPs are a leading dark-matter candidate that interact only via the weak nuclear force and gravity. Underground experiments such as XENON and LZ place ultrapure liquid xenon deep below ground to shield cosmic rays and wait for the rare recoil of a nucleus struck by a WIMP; none has been confirmed yet.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review结论有争议 · Contested
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
XENON / LZ 暗物质直接探测实验（液氙时间投影室）
XENON / LZ dark matter direct-detection experiments
#暗物质 #WIMP #直接探测 #液氙实验
暗能量的“状态方程参数 w”告诉我们什么？
What does the dark-energy equation-of-state parameter w tell us?
暗能量的状态方程参数 w 描述其压强与能量密度之比。若 w = -1（即“宇宙学常数”），压强与密度大小相等、符号相反；暗能量巡天与普朗克等观测都把 w 约束在 -1 附近，但略偏离也可能暗示暗能量随时间变化。
The equation-of-state parameter w describes dark energy's pressure-to-density ratio. If w = −1 (a “cosmological constant”), pressure equals density in magnitude but opposite in sign. Surveys like DES and Planck constrain w near −1, though a slight deviation could mean dark energy evolves with time.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#暗能量 #状态方程 #宇宙学常数 #暗能量巡天
引力透镜如何被用来寻找暗物质？
How is gravitational lensing used to find dark matter?
大质量天体（包括暗物质晕）会弯曲背景光线，这种现象称为引力透镜。通过分析星系团造成的强、弱透镜畸变，可以绘制出不可见物质的分布，证明其远超可见物质。
Massive objects, including dark-matter halos, bend background light in an effect called gravitational lensing. By analyzing the strong and weak distortions around galaxy clusters, astronomers map the invisible matter and show it vastly outweighs the visible.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#引力透镜 #暗物质晕 #星系团 #质量分布
我们如何知道暗物质存在？
How do we know dark matter exists?
星系自转曲线、星系团引力透镜和宇宙大尺度结构都显示可见物质远远不够，必须存在大量不可见物质提供额外引力。
Galaxy rotation curves, cluster gravitational lensing and large-scale structure all show visible matter is far too little, requiring large invisible mass to supply extra gravity.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#引力透镜 #暗物质证据
子弹星系团的照片为什么被称为「暗物质的直接证据」?它到底拍到了什么?
Why is the Bullet Cluster called direct evidence for dark matter — what did the picture actually catch?
两个星系团以每秒四千多公里对撞后穿过彼此,照片叠加两种地图:X射线亮斑显示占普通物质大头的炽热气体——迎面风把它刹车甩在中间,像两团相撞的云;引力透镜重建的质量分布却显示主要质量已随星系径直穿行到两侧。即质量主体既不是气体也不是恒星,而是一种不与气体摩擦、碰撞中如幽灵般互不干扰的成分——恰是冷暗物质模型预言的性质。虽有个别研究者争论统计显著性,多数宇宙学家视其为排除纯修正引力的关键案例之一。
Two clusters crashed through each other at over four thousand kilometers per second, and the composite picture layers two maps. X-ray light marks the hot plasma holding most normal matter — ram pressure braked it mid-collision like two clouds colliding. Gravitational-lensing mass reconstruction, though, shows the dominant mass sailed straight through to both sides with the galaxies. The bulk of mass therefore neither glows nor frictionally interacts — it passed ghostlike through itself, exactly as cold dark matter models predict. Despite debates over statistical significance in individual merges, most cosmologists count it among the key cases ruling out purely modified-gravity accounts.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Clowe 等,《A Direct Empirical Proof of the Existence of Dark Matter》,The Astrophysical Journal Letters 第648卷,2006
D. Clowe et al., A Direct Empirical Proof of the Existence of Dark Matter, The Astrophysical Journal Letters 648, 2006
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1086/508162：A Direct Empirical Proof of t
#子弹星系团 #引力透镜 #冷暗物质
什么是ΛCDM模型？
What is the ΛCDM model?
ΛCDM（Lambda冷暗物质）模型是当前描述宇宙的主流框架，假设宇宙由暗能量（Λ）、冷暗物质和普通物质组成。它成功解释了大量宇宙学观测，但也面临一些局部张力。
The ΛCDM (Lambda cold dark matter) model is the leading framework for the universe, assuming it is made of dark energy (Λ), cold dark matter, and ordinary matter. It explains a wide range of cosmological observations, though some local tensions remain.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#ΛCDM #冷暗物质 #宇宙学模型 #暗能量
星系自转曲线如何成为暗物质存在的关键证据？
How do galaxy rotation curves provide key evidence for dark matter?
按可见物质计算，星系外缘的恒星绕转速度应随距离下降，但薇拉·鲁宾等测得的自转曲线却在外侧保持平坦。这意味着星系被大量看不见的“暗物质”晕所包裹；早在1930年代，兹威基在星系团中也发现了类似的缺失质量迹象。
Based on visible matter alone, outer stars' orbital speeds should drop with distance, yet Vera Rubin's measured rotation curves stay flat far out. This implies galaxies are embedded in unseen “dark matter” halos; Zwicky saw similar missing mass in galaxy clusters back in the 1930s.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
薇拉·鲁宾、肯特·福特,《Rotation of the Andromeda Nebula from a Spectroscopic Survey of Emission Regions》,The Astrophysical Journal,1970 (DOI: 10.1086/150317)；弗里茨·兹威基（1933，星系团质量缺失）
Rubin and Ford, 'Rotation of the Andromeda Nebula from a Spectroscopic Survey of Emission Regions', The Astrophysical Journal, 1970, DOI: 10.1086/150317; Fritz Zwicky (1933)
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1086/150317
#暗物质 #自转曲线 #薇拉·鲁宾 #星系晕
什么是引力透镜？
What is gravitational lensing?
大质量天体弯曲周围时空，使背后星光路径偏折、影像被放大或扭曲，如同宇宙中的透镜，可用来称量暗物质。
A massive object bends spacetime so background light is deflected and distorted like through a lens—a cosmic lens used to weigh dark matter.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#引力透镜 #时空弯曲
星系转得越外圈越不减速,这和太阳系有什么根本不同?
Why do galaxy rotation curves stay flat out to the edge, unlike the solar system?
太阳系几乎全部质量集中在太阳,按开普勒-牛顿规律,越远的行星转速越慢(水星47公里每秒,海王星仅5.4);鲁宾与福特在1970年代测量仙女座等星系却发现,气体与恒星的转动速度到可见边缘依旧平直不坠。若只算发光物质,这些天体早该离心飞散。最经济的解释是存在大量不发光但贡献引力的暗物质,包裹成比可见盘大得多的晕;宇宙学今测得暗物质约占物质总量的八成五。平直自转曲线因此是暗物质最早、最直观的证据之一。
In the solar system nearly all mass sits in the Sun, so Kepler-Newton mechanics slows outer planets — Mercury orbits at 47 km/s, Neptune at 5.4. When Rubin and Ford measured Andromeda-class galaxies in the 1970s, gas and stars kept flat orbital speeds beyond the visible edge; counting starlight alone, such bodies should have flown apart. The economical fix is dark matter — non-luminous yet gravitational — forming a halo far larger than the visible disk; cosmology now credits it with about eighty-five percent of all matter. Flat rotation curves remain the earliest, most visceral link in that evidence chain.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
V. C. Rubin 与 W. K. Ford Jr.,《Rotation of the Andromeda Nebula from a Spectroscopic Survey of Emission Regions》,The Astrophysical Journal 159,1970 (DOI: 10.1086/150317)
V. C. Rubin and W. K. Ford Jr., 'Rotation of the Andromeda Nebula from a Spectroscopic Survey of Emission Regions', The Astrophysical Journal 159, 1970, DOI: 10.1086/150317
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1086/150317
#暗物质 #自转曲线 #暗晕
暗物质到底是什么？我们为什么确信它存在？
What exactly is dark matter, and why are we sure it exists?
暗物质是不发光、不吸收光、只通过引力显现的物质，星系旋转曲线、引力透镜和宇宙微波背景都证明它远多于普通物质，但其粒子本质仍是未解之谜。
Dark matter neither emits nor absorbs light and shows up only through gravity; rotation curves, gravitational lensing, and the CMB prove it outweighs ordinary matter, yet its particle nature remains unknown.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Carroll & Ostlie,《An Introduction to Modern Astrophysics》第2版,Cambridge University Press,2017
B. W. Carroll and D. A. Ostlie, An Introduction to Modern Astrophysics, 2nd ed., Cambridge University Press, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-1-108-42216-1 (2nd ed., Cambridge Univ. Press)
#暗物质 #引力 #未解之谜