Tootfinder

The First Radio-Bright Off-Nuclear TDE 2024tvd Reveals the Fastest-Evolving Double-Peaked Radio Emission
Itai Sfaradi, Raffaella Margutti, Ryan Chornock, Kate D. Alexander, Brian D. Metzger, Paz Beniamini, Rodolfo Barniol Duran, Yuhan Yao, Assaf Horesh, Wael Farah, Edo Berger, Nayana A. J., Yvette Cendes, Tarraneh Eftekhari, Rob Fender, Noah Franz, Dave A. Green, Erica Hammerstein, Wenbin Lu, Eli Wiston, Yirmi Bernstein, Joe Bright, Collin T. Christy, Luigi F. Cruz, David R DeBoer, Wal…

The First Radio-Bright Off-Nuclear TDE 2024tvd Reveals the Fastest-Evolving Double-Peaked Radio Emission
We present the first multi-epoch broadband radio and millimeter monitoring of an off-nuclear TDE using the VLA, ALMA, ATA, AMI-LA, and the SMA. The off-nuclear TDE 2024tvd exhibits double-peaked radio light curves and the fastest evolving radio emission observed from a TDE to date. With respect to the optical discovery date, the first radio flare rises faster than $F_{\rm ν} \sim t^{9}$ at $Δt = 88-131$ days, and then decays as fast as $F_{\rm ν} \sim t^{-6}$. The emergence of a second radio…

Een bananenrepubliek is er niks bij.
Ruzie tussen Trump en Musk escaleert: 'Ondankbaar en doorgedraaid' https://nos.nl/l/2570118

Ruzie tussen Trump en Musk escaleert: 'Ondankbaar en doorgedraaid'
De rijkste man ter wereld en de machtigste man ter wereld vechten openlijk een ruzie uit.

Immer diese Angelsachsen mit ihren Maßeinheiten. 🤨
#Messtechnik

On the Efficiency of Producing Gamma-Ray Bursts from Isolated Population III Stars
Gibran Morales-Rivera, Ramandeep Gill, S. Jane Arthur, Paz Beniamini, Jonathan Granot
https://arxiv.org/abs/2508.03689

On the Efficiency of Producing Gamma-Ray Bursts from Isolated Population III Stars
The rate of long-duration gamma-ray bursts (GRBs) from isolated Pop III stars is not well known, as it depends on our poor understanding of their initial mass function (IMF), rotation rates, stellar evolution, and mass loss. A sub-population of massive ($M_{\rm ZAMS}\gtrsim20M_\odot$) Pop III stars is expected to suffer core-collapse and launch a relativistic jet that would power a GRB. In the collapsar scenario, a key requirement is that the pre-supernova star imparts sufficient angular moment…

A dynamical coherency gate for state recovery: Statistical requiem for the long arc of cislunar orbital mis-prediction
Binyamin Stivi, Vishnuu Mallik, Lamberto Dell'Elce, Aaron J. Rosengren
https://arxiv.org/abs/2506.22748

A dynamical coherency gate for state recovery: Statistical requiem for the long arc of cislunar orbital mis-prediction
We present a statistically grounded methodology for recovering physically consistent initial conditions from historical two-line element sets (TLEs), enabling accurate long-arc trajectory reconstruction for distant and highly eccentric Earth satellites. The approach combines numerical averaging of osculating orbital elements with Gaussian-mixture-model (GMM) filtering with robust fallback strategies to isolate a dynamically coherent subset of mean elements at a common reference epoch. From this…

ProForm: Solder-Free Circuit Assembly Using Thermoforming
Narjes Pourjafarian, Zhenming Yang, Jeffrey I. Lipton, Benyamin Davaji, Gregory D. Abowd
https://arxiv.org/abs/2507.20933

ProForm: Solder-Free Circuit Assembly Using Thermoforming
Electronic waste (e-waste) is a growing global challenge, with millions of functional components discarded due to the difficulty of repair and reuse. Traditional circuit assembly relies on soldering, which creates semi-permanent bonds that limit component recovery and contribute to unnecessary waste. We introduce ProForm, a thermoforming approach for solder-free circuit prototyping. By encapsulating electronic components with pressure-formed thermoplastics, ProForm enables secure, reversible mo…

Properties and approximations of a Bessel distribution for data science applications
Massimiliano Bonamente
https://arxiv.org/abs/2507.21812 https://arxiv.…

Properties and approximations of a Bessel distribution for data science applications
This paper presents properties and approximations of a random variable based on the zero-order modified Bessel function that results from the compounding of a zero-mean Gaussian with a $χ^2_1$-distributed variance. This family of distributions is a special case of the McKay family of Bessel distributions and of a family of generalized Laplace distributions. It is found that the Bessel distribution can be approximated with a null-location Laplace distribution, which corresponds to the compoundi…

X-ray absorption lines in FUV-detected quasars: II. Cosmological density and properties of the missing baryons
Massimiliano Bonamente, David Spence, Jussi Ahoranta, Nastasha Wijers, Toni Tuominen, Jelle De Plaa
https://arxiv.org/abs/2507.21719

X-ray absorption lines in FUV-detected quasars: II. Cosmological density and properties of the missing baryons
This paper presents constraints on the cosmological density of baryons from a systematic search for O VII and O VIII absorption lines in the XMM-Newton and Chandra X-ray spectra of 51 background sources. The search is based on far ultra-violet redshift priors from HST and FUSE, and it has resulted in the identification of 34 possible O VII and O VIII absorption-line systems at the 99% confidence level, out of a search in 1,224 systems with fixed redshift priors. Of these, 7 O VII and 8 O VIII s…

Closure Conversion, Flat Environments, and the Complexity of Abstract Machines
Beniamino Accattoli (Inria & LIX, \'Ecole Polytechnique), Dan Ghica (Huawei Central Software Institute, University of Birmingham), Giulio Guerrieri (University of Sussex), Cl\'audio Belo Louren\c{c}o (Huawei Central Software Institute), Claudio Sacerdoti Coen (Universit\`a di Bologna)

Closure Conversion, Flat Environments, and the Complexity of Abstract Machines
Closure conversion is a program transformation at work in compilers for functional languages to turn inner functions into global ones, by building closures pairing the transformed functions with the environment of their free variables. Abstract machines rely on similar and yet different concepts of closures and environments. In this paper, we study the relationship between the two approaches. We adopt a very simple λ-calculus with tuples as source language and study abstract machines for bot…

Positive Sharing and Abstract Machines
Beniamino Accattoli, Claudio Sacerdoti Coen, Jui-Hsuan Wu
https://arxiv.org/abs/2506.14131 https://

Positive Sharing and Abstract Machines
Wu's positive $λ$-calculus is a recent call-by-value $λ$-calculus with sharing coming from Miller and Wu's study of the proof-theoretical concept of focalization. Accattoli and Wu showed that it simplifies a technical aspect of the study of sharing; namely it rules out the recurrent issue of renaming chains, that often causes a quadratic time slowdown. In this paper, we define the natural abstract machine for the positive $λ$-calculus and show that it suffers from an inefficiency: the quad…