Teleskop Dampe ungkap pola universal pada sinar kosmik

Kamis, 14 Mei 2026

Dilaporkan oleh AI

Para peneliti yang menggunakan teleskop ruang angkasa DAMPE telah mengidentifikasi pelemahan spektral yang sama pada sinar kosmik di berbagai jenis partikel. Pola tersebut muncul pada rigiditas sekitar 15 teraelektron-volt untuk proton hingga inti besi. Temuan ini, yang diterbitkan dalam Nature, menawarkan wawasan baru tentang bagaimana partikel berenergi tinggi ini berperilaku di galaksi.

Selama lebih dari satu abad, para ilmuwan telah mempelajari sinar kosmik, partikel paling energetik yang dikenal di alam. Data dari misi DAMPE, yang diluncurkan pada Desember 2015, kini menunjukkan bahwa jumlah partikel ini menurun drastis setelah melewati ambang batas rigiditas yang sama. Efek tersebut berlaku bagi proton, helium, karbon, oksigen, serta inti besi.

Artikel Terkait

New model proposes dark matter made of two particles to explain Milky Way gamma-ray excess

Building on prior detections of gamma-ray emissions from the Milky Way's center, physicists led by Gordan Krnjaic at Fermilab propose dark matter consists of two distinct particles that interact to produce detectable signals. This resolves the puzzle of signals in the Milky Way but none in dark-matter-rich dwarf galaxies, as observed by the Fermi Gamma-ray Space Telescope.

Physicists link extreme neutrino to exploding primordial black hole

Rabu, 08 April 2026 Dilaporkan oleh AI

Physicists at the University of Massachusetts Amherst propose that a record-breaking neutrino detected in 2023 originated from the explosion of a primordial black hole carrying a 'dark charge.' The particle's energy, 100,000 times greater than that produced by the Large Hadron Collider, puzzled scientists since only the KM3NeT experiment recorded it. Their model, published in Physical Review Letters, could also hint at the nature of dark matter.

Ilmu Pengetahuan

Gravitational waves may have created early universe dark matter

Ilmu Pengetahuan

Scientists capture metal turning into star-like plasma in trillionths of a second

Ilmu Pengetahuan

Researchers reduce uncertainty in cosmic birefringence measurements

Astronomers solve gamma-Cas X-ray mystery after 50 years

Astronomers have identified the source of unusual X-rays from the bright star gamma-Cas as a hidden white dwarf companion siphoning material from it. High-resolution data from the XRISM space mission confirmed that the emissions arise from matter heating up as it falls onto the unseen star. The discovery ends a puzzle that has intrigued scientists since the 1970s.

Scientists unveil camera capturing trillionth-of-a-second events

Selasa, 21 April 2026 Dilaporkan oleh AI

Researchers at East China Normal University have developed a new imaging technique that captures ultrafast events in trillionths of a second, revealing both brightness and structural changes in a single shot. The method, called compressed spectral-temporal coherent modulation femtosecond imaging (CST-CMFI), tracks phenomena like plasma formation and electron movement. Yunhua Yao, the team leader, described it as a major advance for physics, chemistry, and materials science.

14 Mei 2026 14.22