My thoughts on what the Hubble tension really is, based on George Efstathiou’s “To H0 or not to H0?“, arXiv:2103.08723.
This week’s entry discusses a new measurement of the Hubble constant from Type II Supernovae, a map from Poincaré gauge theories to bi-scalar-tensor theories useful for cosmological applications, and a map between fluid and field approaches to interacting dark energy valid at the background and first-order perturbation level.
This week’s entry is dedicated to the H0 tension and attempts to solve the latter through early dark energy (possibly going beyond General Relativity), as well as to how a mysterious phenomenon known as skyquakes could be connected to an exotic model of dark matter known as axion quark nuggets. I hope this post will provide you a bit of entertainment (hopefully at home) in this time of uncertainty due to COVID-19.
In this week’s summaries I look at vector-tensor Horndeski gravity (the lesser known sibling of scalar-tensor Horndeski gravity), the (im)possibility of solving the Hubble tension with late-time transitions in the dark energy, and a reconstruction of the time-dependent interaction between cold dark matter and vacuum energy. Note the possibility that next week’s entry might be cancelled or in the best case delayed (see my away note).
Here comes the third installment of my “Top arXiv papers of the week” column. Remember the warnings I pointed out in the first entry, that comments and criticisms are always appreciated, and enjoy!
