This week’s post covers a new measurement of H0 from fast radio bursts, a new compressed low-multipole Planck likelihood, and the first detailed study of the impact of the mass-sheet degeneracy in gravitational wave lensing. Enjoy!
Top arXiv papers from Week 3, 2021
This week’s post is dedicated to dark energy in the context of (not solving) the Hubble tension, the possibility that the NANOGrav pulsar timing array may have detected non-tensorial gravitational wave polarizations, and the construction of a general covariant action for the so-called holographic dark energy model. Enjoy the read and have a nice weekend!
Top arXiv papers from Week 51, 2020
After a while that this subject hadn’t appeared in my blog, this week’s entry is entirely dedicated to the Hubble tension: a new observational update in light of Gaia DR3 parallaxes, an old model being killed, and prospects from future neutron star-black hole mergers. A heads-up that this will be the last entry for 2020, as I’m “going” on holidays. Stay tuned for next year’s entries, “see” you soon, Merry Christmas and Happy New Year!
Top arXiv papers from Week 41, 2020
After disappearing for a week, this week I cover three papers discussing why reducing the sound horizon is necessary but not sufficient to solve the Hubble tension, how to probe gravitational waves using astrometry, and whether unparticles might have something to do with dark energy. As of this week I’ve also decided to start including plots from the respective papers, where necessary, in my summaries, as a good plot is worth a thousand words. Enjoy!
Top arXiv papers from Week 37, 2020
After a much needed 3-week break in Spain and 2 weeks “at” the Cosmology from Home conference (great talks, great format, great work by the organizers, 5+ stars from my side), the weekly arXiv synopses return! This week I cover the first constraints on small-scale non-Gaussianity from the UV galaxy luminosity function, astrophysical signatures of black holes carrying magnetic charge, and the HMCODE-2020 code for modelling the non-linear matter power spectrum. Enjoy!
Top arXiv papers from Week 31, 2020
End-of-the-week synopses looking at the possibility of directly detecting dark energy fluctuations using anisotropies in gravitational wave luminosity distances, constraints on baryonic effects from the DES Y1 data, and revisiting constraints on the CMB temperature and whether the latter might have some bearings on the H0 tension. A heads-up that this will be the last entry for the next 5 weeks, as I’m going on holiday. Enjoy, and see you again here in mid-September!
Top arXiv papers from Week 30, 2020
Top arXiv papers from Week 28, 2020
Top arXiv papers from Week 26, 2020
End of the week wrap-up, which discusses how early dark energy runs into trouble when confronted against large-scale structure full-shape galaxy power spectrum data (with a social injustice metaphor related to bad practices when trying to solve the H0 tension), the puzzling origin of GW190814, and a good ambulance chasing paper which turns XENON1T into a machine to set precise constraints on non-standard neutrino interactions.
Top arXiv papers from Week 20, 2020
This week’s installment covers a new Bayesian analysis code (particularly designed for cosmological studies!) called Cobaya, a gravitational wave constraint on the number π (yes, you’ve read correctly) as a null test of General Relativity, and a new proposal for holographic dark energy based on John Barrow’s recent COVID-19-inspired proposal for fractal structure on a black hole event horizon. Enjoy!