Is string theory compatible with observational data? Today’s paper looks at how avoiding the swampland of unsuccessful string theories can mean violating reliable constraints on cosmological quantities.
Neutron star black hole mergers are an ideal way to measure the Hubble constant.
Many satellite galaxies in the local universe are orbiting their parent galaxies in highly coherent planes—yet such structures are vanishingly rare in simulations. What gives?
The redshifts of active galactic nuclei (AGNs) can help us piece together the universe’s evolutionary timeline. Unfortunately, measuring these redshifts can be pretty tricky. In today’s astrobite, we look at a trick for estimating and constraining the redshifts of AGNs that are – ironically enough – partially obscured from our view.
… and therefore more powerful. Describing dark matter as a fluid allows us to model dark matter candidates with great accuracy.
Quantum mechanics describes the unimaginably small, whilst Cosmology explains the unfathomably big. How the Universe blew up from one to the other is a question we think we’ve understood with the theory of inflation. But just how good is our picture of quantum mechanics? Today’s authors show that we can now use cosmological results to test our quantum framework.