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.
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 is the second entry of my “Top arXiv papers of the week” column. The usual warnings I already pointed out in the first entry hold here too, in other words your mileage may vary. With these caveats in mind, hope you enjoy!
