Telescópio Dampe revela padrão universal em raios cósmicos

14 de maio de 2026

Reportado por IA

Pesquisadores utilizando o telescópio espacial DAMPE identificaram um abrandamento espectral compartilhado em raios cósmicos através de múltiplos tipos de partículas. O padrão aparece em uma rigidez de cerca de 15 teraelétron-volts para prótons até núcleos de ferro. Esta descoberta, publicada na revista Nature, oferece uma nova perspectiva sobre como essas partículas de alta energia se comportam na galáxia.

Por mais de um século, cientistas estudam os raios cósmicos, as partículas mais energéticas conhecidas na natureza. Dados da missão DAMPE, lançada em dezembro de 2015, mostram agora que o número dessas partículas cai drasticamente além de um limite de rigidez comum. O efeito ocorre da mesma forma para prótons, hélio, carbono, oxigênio e núcleos de ferro.

Artigos relacionados

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

08 de abril de 2026 Reportado por IA

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.

Ciência

Gravitational waves may have created early universe dark matter

Ciência

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

Ciência

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

21 de abril de 2026 Reportado por IA

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.

quinta-feira, 14 de maio de 2026, 14:22h