• Astronomers See Flares Coming from the Milky Way’s Supermassive Black Hole

    Updated: 2025-01-15 15:10:21
    Skip to content Universe Today Space and astronomy news Menu Videos Newsletter Podcast Contact Us Support Us Log in This artist†s conception of the mid-IR flare in Sgr A captures the variability , or changing intensity , of the flare as the black hole†s magnetic field lines bunch together . This bunching results in magnetic reconnection , which produces particles and energy that spiral along the magnetic field lines until they cool and release their energy , spiking the intensity of the flare . Credit : CfA Melissa Weiss Posted on January 15, 2025 January 15, 2025 by Andy Tomaswick Astronomers See Flares Coming from the Milky Way’s Supermassive Black Hole There’s plenty of action at the center of the galaxy , where a supermassive black hole SMBH known as Sagittarius A Sgr A literally

  • Galaxy Cores May be Giant Fuzzy Dark Stars

    Updated: 2025-01-15 02:20:15
    Skip to content Universe Today Space and astronomy news Menu Videos Newsletter Podcast Contact Us Support Us Log in This striking image was taken by the NASA ESA Hubble Space Telescope†s Wide Field Camera 3, a powerful instrument installed on the telescope in 2009. WFC3 is responsible for many of Hubble†s most breathtaking and iconic photographs , including Pictures of the Week . Shown here , NGC 7773 is a beautiful example of a barred spiral galaxy . A luminous bar-shaped structure cuts prominently through the galaxy's bright core , extending to the inner boundary of NGC 7773's sweeping , pinwheel-like spiral arms . Astronomers think that these bar structures emerge later in the lifetime of a galaxy , as star-forming material makes its way towards the galactic centre — younger

  • This Quasar Helped End the Dark Ages of the Universe

    Updated: 2025-01-14 23:47:16
    Skip to content Universe Today Space and astronomy news Menu Videos Newsletter Podcast Contact Us Support Us Log in AI-generated image created with researcher illustration , edited by Michael S . Helfenbein Posted on January 14, 2025 January 14, 2025 by Mark Thompson This Quasar Helped End the Dark Ages of the Universe After the Big Bang came the Dark Ages , a period lasting hundreds of millions of years when the universe was largely without light . It ended in the epoch of reionization when neutral hydrogen atoms became charged for the first time and the first generation of stars started to form . The question that has perplexed astronomers is what caused the first hydrogen atoms to charge . A team of researchers have observed an early quasar that pumped out enormous amounts of x-ray

  • Here's How We Could Measure the Mass of SgrA* to Within One Solar Mass

    Updated: 2025-01-14 19:02:20
    The mass of the Milky Way's supermassive black hole, SgrA*, is roughly 4.3 million times the mass of the Sun, give or take a few hundred thousand solar masses. But a team of astronomers thinks they can dial that accuracy down to know with an error rate of a single solar mass. They propose to do this by measuring gravitational waves from SgrA* as brown dwarfs orbit it closely. These dwarfs act like natural probes mapping out the warped space around SgrA*. The post Here's How We Could Measure the Mass of SgrA* to Within One Solar Mass appeared first on Universe Today.

  • Article on Testing Non standard Neutrino Properties at Arxiv

    Updated: 2025-01-09 03:01:00
    https://www.arxiv.org/abs/2501.04309

  • Limits on new gauge vector forces and associated mass giving scalars for Z decay

    Updated: 2025-01-09 02:57:00
    The new paper at ArXiv https://www.arxiv.org/abs/2501.04388 by Peli and Trocsanyi linit show how Higgs Bosons decay measurements can limit new Bosons. The current measurement of Z width is not yet strong enough to limit all new models. The SM theoretical prediction for the Higgs boson width is ΓSM h = 4.07 MeV, with a relative uncertainty of 4% [3]. The experimental measurements on the other hand are ΓATLAS h = 4.5+3.3 −2.5 MeV [17] and ΓCMS h = 3.2+2.4 −1.7 MeV [18], display a much larger uncertainty than the SM theoretical prediction allowing for several BSM models to remain compatible with observations.

  • Nova and T2K find non unitary mixing 3 sigma - Excess Neutrinos more than expected from oscillations - Neutrino Decay or Neutrino Pair Production

    Updated: 2025-01-07 02:58:00
    In https://www.arxiv.org/pdf/2501.00146 Yu et al Analysis results from the 295 Kilometer far detector from J-PARC, T2k, and the 810 Kilometer far detector at Fermilab both with Gev Muon Neutrino, both seem to show excess electron neutrinos more than can be expect from Unitary (Preversing Particle Number) Oscillations of Neutrinos, the Nova detector show this much more strongly than T2k. Could Muon Neutinos be pair producing electron neutinos by scattering along the way, v_mu-v_mu + v_e + v-bar_e? As our axial force might do. The amount of extra electron neutrinos is 6% averaged over both experiments.

  • DESI results don't favour a cosmological constant but a varying quintessence of some form.

    Updated: 2024-12-20 06:27:00
    The DESI results using Baryon Ascotic oscillations together with supernova spectrum to find galaxy velocity, seem at (3.4 Sigma) not to favour the cosmological constant but an dark energy or quintessence that reduces with time. Combined results have the equation of state parameter as 0.86 +.10 -.11. Zheng et al in https://arxiv.org/abs/2412.04830 Remember our axial force modelled qunintessence as a neutrino dark energy caused by the attractive force between neutrinos, which we estimate an equation of state or owega of 17/18 or 0.94444.

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