Amery Gration

Dyad: a binary-star dynamics and statistics library for Python Gration, A., (2026). Dyad: a binary-star dynamics and statistics library for Python. Journal of Open Source Software, 11(118), 9011, https://doi.org/10.21105/joss.09011

Software paper! This is Dyad, a Python library for binary-star dynamics and statistics. It allows you to generate a population of binary stars by sampling their component masses and orbital elements from a library of choices. Documentation and tutorials provided (just click through to the repo). 🔭 ☄️

A method for constructing the joint mass function of binary stars The initial mass function (IMF) describes the distribution of stellar masses in a population of newly born stars and is amongst the most fundamental concepts in astrophysics. It is not only the direct...

New paper 👀! The statistics of binary-star masses relies on the joint mass function, which must respect the IMF of the binaries' components and the distribution of their mass ratios. @robizzard.bsky.social, @payeldas.bsky.social, and I show how to construct it in the general case. 🔭☄️

Stellar velocity distributions in binary-rich ultrafaint dwarf galaxies Ultrafaint dwarf (UFD) galaxies are dominated by dark matter, the distribution of which may be inferred from the kinematics of that galaxy's stellar population. Star-by-star observations are available...

It's paper day! 'Stellar velocity distributions in binary-rich ultrafaint dwarf galaxies' is now up online. arxiv.org/abs/2509.14316

I will forever be haunted by this footage.

Trawling has only been filmed underwater a few times in documentary history, and never with such clarity.

What’s so heart-rending about these shots is watching how the animals don’t just get swept up — they swim for their lives.
🌎🦑🧪

For Women Scotland: a legal critique | Good Law Project April’s Supreme Court decision is being treated as the final word. But the judgment has introduced considerable uncertainty to the law, and some parts appear to set back the rights of trans people by ...

April’s Supreme Court decision is being treated as the final word.

But the judgment has introduced considerable uncertainty to the law, and some parts appear to set back the rights of trans people by over 20 years, says barrister @crash-w.bsky.social:
goodlaw.social/d4n8

If you're watching The Traitors this year, then here's a lovely paper on its dynamics! ui.adsabs.harvard.edu/abs/2010arXi...

... and that's me finally off Twitter.

Paper day! My paper with John Magorrian, 'Mapping dust in the giant molecular cloud Orion A' (arxiv.org/abs/2401.12976) has been accepted by MNRAS and is on the Arxiv.