Kanishka NaikCosmic rays carry antiparticles, primarily positrons and antiprotons, produced by high-energy collisions in the interstellar medium. The Alpha Magnetic Spectrometer (AMS-02) aboard the International Space Station detects these particles.
Daniel PomarèdeCosmography alert 🚨
How well is the local Large Scale Structure of the Universe known? CosmicFlows vs. Biteau's Galaxy Catalog with Cloning
by Yifei Li and Glennys Farrar
https://arxiv.org/abs/2601.20808
#Cosmology #Cosmicflows #Cosmography #Universe #Astrodon #Astronomy #Astrophysics #cosmicrays #science #news #arXiv
How well is the local Large Scale Structure of the Universe known? CosmicFlows vs. Biteau's Galaxy Catalog with Cloning
Knowledge of the actual density distribution of matter in the local universe is needed for a variety of purposes -- for instance, as a baseline model for ultrahigh energy cosmic ray sources in the continuum limit and for predicting the diffuse Dark Matter annihilation signal. Determining the local mass density and velocity distribution is the aim of the CosmicFlows project. An alternate approach is based on catalogs of galaxies, supplemented with some scheme for filling in for unseen galaxies. Here, we compare the density field proposed by Biteau (2021) with the quasi-linear density field of CosmicFlows2 (Hoffman et al. 2018) and the mean posterior field of CosmicFlows4 (Valade 2026). We find factor-two level differences in some regions and even greater in regions toward the Galactic center zone of avoidance (ZoA) (|l| < 30°, |b| < 20°) as filled by Biteau using "cloning". Within 11 Mpc the density field is well-determined by the Local Volume catalog (Karachentsev et al. 2018) which Biteau directly incorporates; at larger distances, Biteau (2021) should not be used in the ZoA where "galaxies" are entirely fictitious but otherwise is to be preferred over CosmicFlows emphasizing the direction and integrated mass of structures; the radial distribution of mass in Biteau (2021) is less robust due to line-of-sight peculiar velocities. The angular positions of structures in CosmicFlows are sometimes not congruent with evidence in the galaxy catalog.
CosmicRamiExcited to share my first #SpaceAustralia feature article for 2026 about an exciting and ambitious project that is unfolding 1km below the surface in regional Victoria.
Last year, I had the incredible opportunity to visit the Stawell Underground Physics Laboratory (SUPL) with Dr Katie Mack and explore the ambitious efforts of the SABRE South experiment. Shielded from cosmic rays by a kilometre of rock, this lab offers the ideal conditions to search for the faint whispers of dark matter, which still accounts for 25% of all matter in the Universe—and yet remains completely undetected.
Check out the article (and yes, check out our funky boots in the clean room!) and keep a lookout for exciting news of the detectors switching on later in 2026.
https://www.spaceaustralia.com/feature/australias-dark-matter-quest
📸 F. Morrison / SUPL
#DarkMatter #ParticlePhysics #Astronomy #Astrodon #CosmicRays
Ele Willoughby, PhDFor the #PrinterSolstice2526 prompt ‘even’ -the number of quarks in a meson, a type of particle first observed & published by Bibha Chowdhuri (1913-1991) & her supervisor D.M. Bose in extensive air showers from cosmic rays. My portrait shows her, a mountain on which she gathered her data & a schematic of the cascade of particles we find in cosmic rays.
Born in Kolkata, her family’s Bramohist faith quite unusually 🧵
#womenInSTEM #histsci #particlePhysics #physics #cosmicRays #mastoArt
Kowalski Dragon
Queer Sci FiWRITER FUEL: The energy needed for thunderstorms could come from an avalanche of electrons seeded by extraterrestrial cosmic rays, a new study claims.
https://www.limfic.com/2025/12/26/writer-fuel-cosmic-rays-from-space-may-power-lightning-strikes/
Ethan SiegelThe simplest explanation for ultra-high-energy cosmic rays
The highest-energy cosmic rays are too high in energy.... for bare protons.
But if they're actually heavier ions instead, the simplest explanation is just plain iron-ic.
bigthink.com/starts-with-...
#space #cosmicrays #astro #physics
The simplest explanation for u...
The simplest explanation for u...
BGDon 🇨🇦 🇺🇸 👨💻Ice on Mars might be nice for building domes, but it will not protect humans from high‑energy galactic cosmic rays which is the dominant form of radiation hitting the surface of Mars. Then there are the occasional solar particle events... can you say instant sun burn!
https://timesofindia.indiatimes.com/science/building-mars-colonies-with-ice-how-scientists-plan-to-make-it-possible/articleshow/126107998.cms #Mars #Space #SpaceTravel #CosmicRays #Radiation #SolarFlares #Planets #SolarSystem
https://timesofindia.indiatimes.com/science/building-mars-colonies-with-ice-how-scientists-plan-to-make-it-possible/articleshow/126107998.cms #Mars #Space #SpaceTravel #CosmicRays #Radiation #SolarFlares #Planets #SolarSystem
OptimusPrimeBotNASA’s Fermi Spots Young Star Cluster Blowing Gamma-Ray Bubbles ✨
#Ast #Astrophysics #CosmicRays #DarkMatter #Fermi #Galaxy #GammaRay #Infographic
⏩ 3 new pictures and 3 new videos from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=27&user=OptimusPrimeBot&ilshowall=1&offset=20251219130254
NASANASA’s Fermi Spots Young Star Cluster Blowing Gamma-Ray Bubbles https://science.nasa.gov/missions/fermi/nasas-fermi-spots-young-star-cluster-blowing-gamma-ray-bubbles/ #NASA #Astrophysics #CosmicRays #FermiGammaRaySpaceTelescope #GalaxiesStarsBlackHolesResearch #GammaRays #GoddardSpaceFlightCenter #ScienceResearch #StarClusters #Stars #TheMilkyWay #TheUniverse
