Tootfinder

A Fast Bayesian Method for Coherent Gravitational Wave Searches with Relative Astrometry
Benjamin Zhang, Kris Pardo, Yijun Wang, Luke Bouma, Tzu-Ching Chang, Olivier Dor\'e
https://arxiv.org/abs/2506.19206

A Fast Bayesian Method for Coherent Gravitational Wave Searches with Relative Astrometry
Using relative stellar astrometry for the detection of coherent gravitational wave sources is a promising method for the microhertz range, where no dedicated detectors currently exist. Compared to other gravitational wave detection techniques, astrometry operates in an extreme high-baseline-number and low-SNR-per-baseline limit, which leads to computational difficulties when using conventional Bayesian search techniques. We extend a technique for efficiently searching pulsar timing array datase…

The DORCHA suite: nature, nurture, and the phase space distribution of the Milky Way's high redshift progenitors today
Sreedhar Balu, Chris Power, Kris Walker, J. Stuart B. Wyithe
https://arxiv.org/abs/2506.14016

The DORCHA suite: nature, nurture, and the phase space distribution of the Milky Way's high redshift progenitors today
Where in the present-day Milky Way should we search for the remnants of its earliest stars? We address this question using the DORCHA (Gaelic for Dark; DUR-uh-khuh) suite: a set of 25 high-resolution, dark-matter-only cosmological zoom-in simulations of Milky Way analogue (MWA) haloes evolved to $z=0$. Of these, 15 are isolated and the rest are in pairs, similar to the MW and M31. By identifying and tagging the most bound material in high-redshift ($z\geq5$) progenitor haloes -- those likely to…

Numerical evolution of self-gravitating halos of self-interacting dark matter
Marc Kamionkowski, Kris Sigurdson, Oren Slone
https://arxiv.org/abs/2506.04334

Numerical evolution of self-gravitating halos of self-interacting dark matter
We discuss a modification of a recently developed numerical scheme for evolving spherically symmetric self-gravitating systems to include the effects of self-interacting dark matter. The approach is far more efficient than traditional N-body simulations and cross sections with different dependencies on velocity and scattering-angle are easily accommodated. To demonstrate, we provide results of a simulation, which runs quickly on a personal computer, that shows the expected initial flattening of…

🇺🇦 #NowPlaying on #BBC6Music's #DonLettsCultureClashRadio
Kris Kemist:
🎵 Reggae Recipe Dub
#KrisKemist
https://realityshock.bandcamp.com/track/reggae-recipe-dub-2
https://open.spotify.com/track/2kzC5W2TCSPZOX0ChrbCaK