Tootfinder

A Multi-Messenger Search for the Supermassive Black Hole Binary in 3C 66B with the Parkes Pulsar Timing Array
Jacob Cardinal Tremblay, Boris Goncharov, Rutger van Haasteren, N. D. Ramesh Bhat, Zu-Cheng Chen, Valentina Di Marco, Satoru Iguchi, Agastya Kapur, Wenhua Ling, Rami Mandow, Saurav Mishra, Daniel J. Reardon, Ryan M. Shannon, Hiroshi Sudou, Jingbo Wang, Shi-Yi Zhao, Xing-Jiang Zhu, Andrew Zic

A Multi-Messenger Search for the Supermassive Black Hole Binary in 3C 66B with the Parkes Pulsar Timing Array
A sub-parsec supermassive black hole binary at the center of the galaxy 3C 66B is a promising candidate for continuous gravitational wave searches with Pulsar Timing Arrays. In this work, we search for such a signal in the third data release of the Parkes Pulsar Timing Array. Matching our priors to estimates of binary parameters from electromagnetic observations, we find log Bayes factor of 0.22, highlighting that the source can be neither confirmed nor ruled out. We place upper limits at 95% c…

Cartel Feria Pulsar 2025
Son 3 dias de música chilena y exposiciones en la Estación Mapocho. Del 5 al 7 de diciembre.
Algunos de los artistas que se seršn parte del cartel: #AnaTijoux #JavieraMena #FernandoMilagros

TL;DR: what if nationalism, not anarchy, is futile?
Since I had the pleasure of seeing the "what would anarchists do against a warlord?" argument again in my timeline, I'll present again my extremely simple proposed solution:
Convince the followers of the warlord that they're better off joining you in freedom, then kill or exile the warlord once they're alone or vastly outnumbered.
Remember that even in our own historical moment where nothing close to large-scale free society has existed in living memory, the warlord's promise of "help me oppress others and you'll be richly rewarded" is a lie that many understand is historically a bad bet. Many, many people currently take that bet, for a variety of reasons, and they're enough to coerce through fear an even larger number of others. But although we imagine, just as the medieval peasants might have imagined of monarchy, that such a structure is both the natural order of things and much too strong to possibly fail, in reality it takes an enormous amount of energy, coordination, and luck for these structures to persist! Nations crumble every day, and none has survived more than a couple *hundred* years, compared to pre-nation societies which persisted for *tends of thousands of years* if not more. I'm this bubbling froth of hierarchies, the notion that hierarchy is inevitable is certainly popular, but since there's clearly a bit of an ulterior motive to make (and teach) that claim, I'm not sure we should trust it.
So what I believe could form the preconditions for future anarchist societies to avoid the "warlord problem" is merely: a widespread common sense belief that letting anyone else have authority over you is morally suspect. Given such a belief, a warlord will have a hard time building any following at all, and their opponents will have an easy time getting their supporters to defect. In fact, we're already partway there, relative to the situation a couple hundred years ago. At that time, someone could claim "you need to obey my orders and fight and die for me because the Queen was my mother" and that was actually a quite successful strategy. Nowadays, this strategy is only still working in a few isolated places, and the idea that one could *start a new monarchy* or even resurrect a defunct one seems absurd. So why can't that same transformation from "this is just how the world works" to "haha, how did anyone ever believe *that*? also happen to nationalism in general? I don't see an obvious reason why not.
Now I think one popular counterargument to this is: if you think non-state societies can win out with these tactics, why didn't they work for American tribes in the face of the European colonizers? (Or insert your favorite example of colonialism here.) I think I can imagine a variety of reasons, from the fact that many of those societies didn't try this tactic (and/or were hierarchical themselves), to the impacts of disease weakening those societies pre-contact, to the fact that with much-greater communication and education possibilities it might work better now, to the fact that most of those tribes are *still* around, and a future in which they persist longer than the colonist ideologies actually seems likely to me, despite the fact that so much cultural destruction has taken place. In fact, if the modern day descendants of the colonized tribes sow the seeds of a future society free of colonialism, that's the ultimate demonstration of the futility of hierarchical domination (I just read "Theory of Water" by Leanne Betasamosake Simpson).
I guess the TL;DR on this is: what if nationalism is actually as futile as monarchy, and we're just unfortunately living in the brief period during which it is ascendant?

Polarized Emission of Intrabinary Shocks in Spider Pulsars from Global 3D Kinetic Simulations
Andrew G. Sullivan, Jorge Cort\'es, Lorenzo Sironi
https://arxiv.org/abs/2508.11625

Polarized Emission of Intrabinary Shocks in Spider Pulsars from Global 3D Kinetic Simulations
In spider pulsar systems, a relativistic intrabinary shock forms when the pulsar wind collides with the massive outflow driven off the pulsar's low-mass stellar companion. The shock is a site of non-thermal particle acceleration, likely via shock-driven magnetic reconnection, and produces synchrotron emission. These shocks are among the few systems in which global scales can be reasonably captured with kinetic simulations, enabling first-principles particle acceleration and emission studies. We…

Tolerance of Phase Noise in Single-Carrier M-Ary QAM Terahertz Wireless Communications
Bowen Liu, Takasumi Tanabe
https://arxiv.org/abs/2509.16843 https://…

Tolerance of Phase Noise in Single-Carrier M-Ary QAM Terahertz Wireless Communications
Terahertz wireless communications offer abundant untapped spectrum and are regarded as a promising playground for next-generation high-throughput links. Yet oscillator phase noise becomes the dominant impairment at such high frequencies, severely limiting the reliability of high-order QAM transmission. Here, phase noise is reconstructed from measured spectra and embedded into a single-carrier link model to evaluate its impact. Distinct distortion mechanisms are identified, with slow common phas…

The organizers of the Zurich Street Parade this year were really lucky. This is the first non-rainy weekend around here in more than a month, and in this context "non-rainy" is German for "pouring liters of rain and it's 10° and we want to murder ourselves collectively in a big dark ritual"
Arte is kind enough to broadcast this other ritual live for your viewing and auditing pleasure.

¡Este es de los regresos que me gustan! 🤩
Después de que volvieron Los Santos Dumont ahora vuelve Casanova. Estuve muy pegado con esa banda como a principios de los 2010.
Ojalš quw saquen presentación en vivo pronto.
https://www.futuro.cl/2025/09/regres…

Just watched a video about project plowshare, which also contained an estimate of the price of a small nuclear weapon, with the point of reference „For the price of a small house in a city, you can wipe that city off the map“.
I feel like this is a promising extension to the „rent vs. buy“ binary.
https://www.youtube.com/watch…

Memory as Structured Trajectories: Persistent Homology and Contextual Sheaves
Xin Li
https://arxiv.org/abs/2508.11646 https://arxiv.org/pdf/2508.11646

Memory as Structured Trajectories: Persistent Homology and Contextual Sheaves
We propose a topological framework for memory and inference grounded in the structure of spike-timing dynamics, persistent homology, and the Context-Content Uncertainty Principle (CCUP). Starting from the observation that polychronous neural groups (PNGs) encode reproducible, time-locked spike sequences shaped by axonal delays and synaptic plasticity, we construct spatiotemporal complexes whose temporally consistent transitions define chain complexes over which robust activation cycles emerge. …

Finding Supermassive Black Hole Binary Mergers in Pulsar Timing Array Data
Sharon Mary Tomson, Boris Goncharov, Rutger van Haasteren
https://arxiv.org/abs/2510.04537 https://

Finding Supermassive Black Hole Binary Mergers in Pulsar Timing Array Data
Galaxy observations suggest there is about one merger of supermassive black hole binaries (SMBHB) throughout the observable universe in a year. Here, we introduce the methodology to search for gravitational waves from these events with Pulsar Timing Arrays (PTAs). Modelling the inspiral, the merger, the ringdown, and the gravitational wave memory components of the signal in simulated data, we demonstrate a proof of principle for detection and parameter estimation. We study a few representativ…