Tootfinder

Spin Constraints on 4U 1630-47 via combined Continuum Fitting and Reflection methods: a comparative study using Frequentist and Bayesian statistics
Debtroy Das, Honghui Liu, Zuobin Zhang, Cosimo Bambi, Jiachen Jiang, Johannes Buchner, Andrea Santangelo, Menglei Zhou
https://arxiv.org/abs/2509.09481…

Spin Constraints on 4U 1630-47 via combined Continuum Fitting and Reflection methods: a comparative study using Frequentist and Bayesian statistics
We present a comprehensive Bayesian spectral analysis of the black hole X-ray binary 4U 1630-47 during its 2022 outburst, using simultaneous \textit{NICER} and \textit{NuSTAR} observations. Using the traditional frequentist approach, we build our model combining reflection spectroscopy with continuum fitting techniques and analyse the data. In the Bayesian framework, we jointly constrain the black hole's spin, mass, inclination, and distance within a unified framework. Employing nested sampling…

Analysis of Pantheon supernova data suggests evidence of sign-changing pressure of the cosmological fluid
A. Kaz{\i}m \c{C}aml{\i}bel, M. Akif Feyizo\u{g}lu, \.Ibrahim Semiz
https://arxiv.org/abs/2508.06861

Analysis of Pantheon+ supernova data suggests evidence of sign-changing pressure of the cosmological fluid
In this work, we revisit/reinterpret/extend the model-independent analysis method (which we now call spread - luminosity distance fitting, spread-LDF) from our previous work. We apply it to the updated supernova type Ia catalogue, Pantheon+ and recent GRB compilations. The procedure allows us, using only FLRW assumption, to construct good approximations for expansion history of the universe, re-confirming its acceleration to be a robust feature. When we also assume General Relativity ("GR"), we…

"I got rid of – just one I got rid of the other night, you buy a house, they have a faucet in the house, Joe, and the faucet the water doesn’t come out. They have a restrictor. You can’t – in areas where you have so much water they don’t know what to do with it. Uh, you have a shower head the shower doesn’t uh, the shower doesn’t, you think it’s not working. It is working. The water’s dripping out and that’s no good for me. I like this hair lace and [sic] – I like that hair nice and wet…

Extended k-u Fading Model in mmWave Communication: Statistical Properties and Performance Evaluations
Jiahuan Wu, Xinchun Yu, Xiao-Ping Zhang
https://arxiv.org/abs/2509.15681 ht…

Extended k-u Fading Model in mmWave Communication: Statistical Properties and Performance Evaluations
This study proposes a small-scale fading model, named the extended k-u model, which incorporates the imbalance of multipath clusters by adding a new parameter based on the original k-u model. The extended k-u model outperforms the k-u model in characterizing small-scale fading in the millimeter-wave (mmWave) band and has more accurate modeling capability than the extended n-u model in scenarios with line-of-sight (LoS) paths. And it is mathematically more tractable than the a-k-n-u model. Exper…

Isospin symmetry breaking and gluon anomaly
A. A. Osipov
https://arxiv.org/abs/2509.07191 https://arxiv.org/pdf/2509.07191…

Isospin symmetry breaking and gluon anomaly
Isospin violating effects, both due to the nonvanishing quark mass difference $m_d-m_u$ and to virtual photons, are studied by fitting the squared masses of pseudoscalar mesons to the second order in the simultaneous expansion in powers of $1/N_c$, momenta and quark masses. It is shown that the gluon anomaly enhances the contribution of virtual photons and, thus, promotes to an additional (to the well-known current algebra result of Gross, Treiman and Wilczek) dynamical restoration of isospin s…

Very good take on this topic. I was about to say nuanced, but it's not really. It’s pretty plain, just not a POV you hear all that much.
Also, props to @… for the boost. I absolutely would not have seen this toot without the boost from Allison, and I’m so glad I did.

Favorable modifications of Scrape-Off Layer (SOL) heat flux width through pulsed fuelling in ADITYA-U Tokamak
SK Injamul Hoque (Institute for Plasma Research, Gandhinagar, India, Homi Bhabha National Institute, Mumbai, India), Harshita Raj (Institute for Plasma Research, Gandhinagar, India, Homi Bhabha National Institute, Mumbai, India), Ritu Dey (Department of Physics, Indian Institute of Technology Tirupati, Yerpedu, India), Soumitra Banerjee (Institute for Plasma Research, Gandhinag…

Favorable modifications of Scrape-Off Layer (SOL) heat flux width through pulsed fuelling in ADITYA-U Tokamak
Enhancement of the scrape-off layer (SOL) heat flux width has been observed in the ADITYA-U Tokamak following the injection of short fuel gas pulses. A notable reduction in parallel heat flux near the last closed flux surface (LCFS) is observed after each pulse. Comparative analysis indicates that pulsed fuelling is more effective in mitigating heat flux with improved core confinement than continuous gas feeding via real-time density control. Analytical and simulation works are also carried out…

Primordial Power Spectrum and Bispectrum from Lattice Simulations of Axion-U(1) Inflation
Drew Jamieson, Angelo Caravano, Eiichiro Komatsu
https://arxiv.org/abs/2507.22285 https…

Primordial Power Spectrum and Bispectrum from Lattice Simulations of Axion-U(1) Inflation
We present primordial non-Gaussianity predictions from a new high-precision code for simulating axion-U(1) inflation on a discrete lattice. We measure the primordial scalar curvature power spectrum and bispectrum from our simulations, determining their dependence on both scale and axion-gauge coupling strength. Both the gauge-sourced power spectrum and the bispectrum exhibit a strong blue tilt due to our choice of an $α$-attractor inflaton potential. We provide fitting functions for the power …

Characterizing Temperatures of Flares on the M Dwarf Wolf 359 from Simultaneous Multiband Optical Observations
Chia-Lung Lin, Li-Ching Huang, Wei-Jie Hou, Hsiang-Yao Hsiao, Wing-Huen Ip
https://arxiv.org/abs/2509.21505

Characterizing Temperatures of Flares on the M Dwarf Wolf 359 from Simultaneous Multiband Optical Observations
We present a flare temperature study of the highly active M~dwarf Wolf~359 using simultaneous multiband ($u$, $g$, $r$, $i$, and $z$) photometric observations from the Lulin 1-m and 41-cm telescopes. Twelve flares were detected over five nights, with significant brightness increases in the $u$, $g$, and $r$~bands; only three were seen in $i$, and none in $z$. From broadband SED fitting and $g$/$r$ color ratio, we derive an average flare temperature of $5500 \pm 1600$~K, significantly cooler tha…

Deciphering The Launching of Multi-phase AGN-driven Outflows and Their (Spatially Resolved) Multi-scale Impact
Lulu Zhang, Gagandeep Kaur, Tianmu Gao, \'Alvaro Labiano, Erin K. S. Hicks, Vivian U, Chris Packham, Missagh Mehdipour, Travis Fischer, Thaisa Storchi Bergmann, Namrata Roy, Isabel M\'arquez, Christiaan Boersma
https://arx…

Deciphering The Launching of Multi-phase AGN-driven Outflows and Their (Spatially Resolved) Multi-scale Impact
Beyond deepening our understanding of the formation, growth, and evolution of supermassive black holes, it is crucial to uncover the role of feeding and feedback processes from growing black holes (i.e., active galactic nucleus; AGN) in shaping the cosmic ecosystem. Such studies include understanding the dynamics of gas flows in the interstellar (ISM), circumgalactic (CGM), intracluster (ICM), and intergalactic media (IGM). As the output of a sub-group in Habitable Worlds Observatory (HWO) AGN …