Physics
Sunny Vagnozzi
What is the Hubble tension, really? A ...

My thoughts on what the Hubble tension really is, based on George Efstathiou’s “To H0 or not to H0?“, arXiv:2103.08723.

What is the Hubble tension, really? A SH0ES-centric view of the problem

A (Hubble) Tension Headache conference diary

A (Hubble) Tension Headache conference diary

As in last week’s post with TMCC2021, this week I will also be live-blogging the “A (Hubble) Tension Headache” conference “from” Southampton. As a clarification note, the conference features four plenary live talks, and a bunch of pre-recorded talks, both invited (including mine) and contributed. The conference will feature summaries and discussions of the pre-recorded talks, alongside panel discussions led by the speakers (plenary and non) of the day. Most of the pre-recorded talks will later be available on YouTube. As such, I will live-blog the plenary talks and the subsequent summaries/discussions/panels of the day, i.e. basically what is really going on during the conference. And the usual reminder of taking whatever is written here with a grain of salt always applies. Hope you enjoy it!

TMCC2021 conference diary

TMCC2021 conference diary

As explained in this earlier post, for this week and the next instead of running my usual weekly arXiv column, I’ll use this blog as a conference diary for two conferences I’ll be attending. I don’t yet know how this is going to pan out (in terms of format, etc.), I guess I’ll figure out on the fly what’s the best way of doing this, but don’t expect anything neat and orderly . This is pretty much the digital equivalent of the type of things I would jot down on the conference notepad if these conferences were happening in person (including possibly some extra-physics stuff from time to time, depending on how bored I am?). As such, take whatever is written here with a grain of salt. I hope you enjoy it!

Busy note 5 and update for the next two weeks

Busy note 5 and update for the next two weeks

A quick note to inform regular readers that my Week 7 reviews will have to be cancelled as I’m extremely busy preparing and recording my talks (at least one of which should later be available on Youtube) for these two conferences: “Tehran Meeting on Cosmology at the Crossroads” (next week), and “A (Hubble) Tension Headache” (week after the next), where I will be talking about spatial curvature and the Hubble tension (no surprise there) respectively.

Top arXiv papers from Week 6, 2021

Top arXiv papers from Week 6, 2021

This week’s post covers the resurgence of cosmic triangles in the context of the Hubble tension, how to use redshift drift to probe dark energy in a model-independent way, and how to self-calibrate polarization efficiency in CMB experiments. Enjoy the read and have a nice weekend!

Top arXiv papers from Week 3, 2021

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

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!

Away note 4

Away note 4

A short note to inform my regular readers that I’ll shortly be “leaving”, metaphorically speaking, for the Christmas holidays. My blog will be paused during then, therefore unfortunately no coverage for those unfortunate papers mistimed enough to come out over the Christmas period. I will resume my blog in the week beginning January 11, so “see” you then! In the meantime, Merry Christmas and Happy New Year! I hope your 2021 will be better than your 2020 (although it’s hard to see how it could be any worse).