We ve had the Big Bang, now some scientists believe there may one day be an opposite reaction – the Fiery Crunch
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We ve had the Big Bang, now some scientists believe there may one day be an opposite reaction – the Fiery Crunch
theaustralian.com.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from theaustralian.com.au Daily Mail and Mail on Sunday newspapers.
Galactic outflows are believed to play a critical role in the evolution of galaxies by regulating their mass build-up and star formation1. Theoretical models assume bipolar shapes for the outflows that extend well into the circumgalactic medium (CGM), up to tens of kiloparsecs (kpc) perpendicular to the galaxies. They have been directly observed in the local Universe in several individual galaxies, for example, around the Milky Way and M82 (refs. 2,3). At higher redshifts, cosmological simulations of galaxy formation predict an increase in the frequency and efficiency of galactic outflows owing to the increasing star-formation activity4. Galactic outflows are usually of low gas density and low surface brightness and therefore difficult to observe in emission towards high redshifts. Here we present an ultra-deep Multi-Unit Spectroscopic Explorer (MUSE) image of the mean Mg II emission surrounding a sample of galaxies at z ≈ 1 that strongly suggests the pres