My thoughts on what the Hubble tension really is, based on George Efstathiou’s “To H0 or not to H0?“, arXiv:2103.08723.
With a week of delay due to Italian bureaucracy-induced commitments, my Week 17 summaries are now out. There is a new entry in terms of topics covered, i.e. the thorny issue of naturalness in particle physics and cosmology (besides two papers covering limits on the duration of inflation, and independent inferences of the baryon energy density from Planck). As always, comments are very welcome!
This week’s entry focuses on observational tests of a specific class of string inflationary models (which allow to set limits on the fundamental microscopic string parameters), observational tests of naked singularity spacetimes from their shadows and the continuum spectrum emitted from accretion disks, and finally a study addressing the interesting question of what was the maximum initial temperature of the Universe in the radiation domination epoch. Happy Easter to those readers who celebrate it!
On the day the UK leaves the EU and I get to live in a non-EU country again after 5 years (yeah!), here comes the fifth installment of my “Top arXiv papers of the week“ column. From this week, I will be reviewing 3 papers instead of 5 (for more info, please see this post). You might also have noticed that my blog now has a name (again, see this post for more info). Enjoy!
