Could we Detect Dark Matter's Annihilation Within Globular Clusters? - by PaulMattSutter
A team of astronomers studied two nearby globular clusters, 47 Tucanae and Omega Centauri, searching for signals produced by annihilating dark matter. Those the searches turned up empty, they weren’t a failure. The lack of a detection placed strict upper limits on the mass of the hypothetical dark matter particle.Dark matter makes up around 80% of all the mass in the universe, although it’s.
So far, the only evidence we have for its existence is through its gravitational effects on the rest of the universe. Because of this, astronomers aren’t exactly sure about what dark matter is, although many physicists believe that it’s someOne possibility is that dark matter is made of some ultra-light particle, like an axion. And while these particles wouldn’t interact with normal matter, they might very rarely interact with themselves, colliding together and annihilating.
South Africa Latest News, South Africa Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Astrophysicists devised a new method to simulate a 'fuzzy' dark matter galactic haloScientists have recently proposed a way to simulate dark matter, which accounts for roughly 85 percent of all the matter in the universe.
Read more »
Biblioracle: Can an android write a book? A new app gets scary close.But what if you could outsource the writing of a book to an algorithm, and the book could be drafted within a matter of minutes?
Read more »
Deep Zoom-In Simulation of a Fuzzy Dark Matter Galactic HaloFuzzy dark matter (FDM) made of ultralight bosonic particles is a viable alternative to cold dark matter with clearly distinguishable small-scale features in collapsed structures. On large scales, it behaves gravitationally like cold dark matter deviating only by a cutoff in the initial power spectrum and can be studied using $N$-body methods. In contrast, wave interference effects near the de Broglie scale result in new phenomena unique to FDM. Interfering modes in filaments and halos yield a stochastically oscillating granular structure which condenses into solitonic cores during halo formation. Investigating these highly nonlinear wave phenomena requires the spatially resolved numerical integration of the Schr\'odinger equation. In previous papers we introduced a hybrid zoom-in scheme that combines $N$-body methods to model the large-scale gravitational potential around and the mass accretion onto pre-selected halos with simulations of the Schr\'odinger-Poisson equation to capture wave-like effects inside these halos. In this work, we present a new, substantially improved reconstruction method for the wave function inside of previously collapsed structures. We demonstrate its capabilities with a deep zoom-in simulation of a well-studied sub-${L}_{*}$-sized galactic halo from cosmological initial conditions. With a particle mass of $m=2.5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}22}\text{ }\text{ }\mathrm{eV}$ and halo mass ${M}_{\mathrm{vir}}=1.7\ifmmode\times\else\texttimes\fi{}{10}^{11}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$ in a $(60\text{ }\text{ }{\mathrm{h}}^{\ensuremath{-}1}\text{ }\text{comoving Mpc}{)}^{3}$ cosmological box, it reaches an effective resolution of 20 comoving pc. This pushes the values of $m$ and $M$ accessible to simulations significantly closer to those relevant for studying galaxy evolution in the allowed range of FDM masses.
Read more »
The Best Products for Acne Scars, According to DermatologistsCreams, gels, and retinoids that help even texture and brighten dark marks.
Read more »
12 Charged After Drug-Infused Paper, Ink, Envelopes Detected In Larimer Inmates' MailNine male inmates and three female accomplices have been charged following the takedown of a drug trafficking organization that provided illicit drugs to inmates through their incoming mail.
Read more »