Tootfinder

An Ultra-Faint, Chemically Primitive Galaxy Forming at the Epoch of Reionization
Kimihiko Nakajima, Masami Ouchi, Yuichi Harikane, Eros Vanzella, Yoshiaki Ono, Yuki Isobe, Moka Nishigaki, Takuji Tsujimoto, Fumitaka Nakamura, Yi Xu, Hiroya Umeda, Yechi Zhang
https://arxiv.org/abs/2506.11846…

An Ultra-Faint, Chemically Primitive Galaxy Forming at the Epoch of Reionization
The formation of the first stars and galaxies marked the onset of cosmic structure and chemical enrichment, yet direct observations of such primordial systems remain elusive. Here we present James Webb Space Telescope spectroscopic observations of LAP1-B, an ultra-faint galaxy at redshift z_{spec}=6.625 +/-0.001, corresponding to a cosmic age of 800 million years after the Big Bang, strongly magnified by gravitational lensing. LAP1-B exhibits a gas-phase oxygen abundance of (4.2 +/- 1.8) x 10^{…

Addressing the $H_0$ tension through matter with pressure and no early dark energy
Youri Carloni, Orlando Luongo, Marco Muccino
https://arxiv.org/abs/2506.11531

Addressing the $H_0$ tension through matter with pressure and no early dark energy
We propose that the Hubble tension arises due to an unaccounted additional component, that behaves as \emph{matter with pressure}. We demonstrate that this fluid remains subdominant compared to both dust and radiation throughout nearly the entire universe expansion history. Specifically, the additional fluid satisfies the Zel'dovic limit with a constant equation of state, $ω_s > 0$, and a quite small normalized energy density, $Ω_s$. Accordingly, this component modifies both the sound horizon…

Penrose process in magnetized non-Kerr rotating spacetime with anomalous quadrupole moment
Shao-Jun Zhang
https://arxiv.org/abs/2507.08401 https://

Penrose process in magnetized non-Kerr rotating spacetime with anomalous quadrupole moment
We investigate the magnetic Penrose process in the Quevedo-Mashhoon spacetime, immersed in a uniform magnetic field $B$. This metric is a stationary, axisymmetric, asymptotically flat vacuum solution to Einstein's equations with an arbitrary anomalous quadrupole moment ${\cal Q}$. A non-vanishing ${\cal Q}$ significantly modifies the near-horizon geometry, creating a multi-lobe ergoregion. Both ${\cal Q}$ and $B$ strongly influence the negative-energy region, which can extend well beyond the er…

LLMs often nail short-term tasks but AI agents can spiral into insane meltdowns over time. This AI-powered vending machine tried to email the FBI to say it was a victim of cyberfraud and then declared its quantum state "collapsed":
https://www.linked…

BASS XLVIII: [Ne v] {\lambda}3427 Emission in Powerful Nearby Active Galactic Nuclei
Tomer Reiss, Benny Trakhtenbrot, Claudio Ricci, Franz E. Bauer, Michael J. Koss, Kohei Ichikawa, Darshan Kakkad, Richard Mushotzky, Kyuseok Oh, Alessandro Peca, Rudolf B\"ar, Yaherlyn Diaz, Fiona Harrison, Meredith C. Powell, Eleonora Sani, Daniel Stern, C. Megan Urry

BASS XLVIII: [Ne v] λ3427 Emission in Powerful Nearby Active Galactic Nuclei
We investigate the high-ionization, narrow [Ne v] $λ$3427 emission line in a sample of over 340 ultrahard X-ray (14-195 keV) selected Active Galactic Nuclei (AGN) drawn from the BASS project. The analysis includes measurements in individual and stacked spectra, and considers several key AGN properties such as X-ray luminosity, supermassive black hole (SMBH) mass, Eddington ratios, and line-of-sight column density. The [Ne v] $λ$3427 line is robustly detected in ~43% (146/341) of the AGN in ou…

Elf Tote an Schule - Erste Fotos: Das ist der Amok-Täter von Graz! #News #Nachrichten

Microscopic investigation of enhanced Pauli paramagnetism in metallic Pu$_2$C$_3$
R. Yamamoto, M. S. Cook, A. R. Altenhof, P. Sherpa, S. Park, J. D. Thompson, H. E. Mason, D. C. Arellano, D. V. Prada, P. H. Tobash, F. Ronning, E. D. Bauer, N. Harrison, W. A. Phelan, A. P. Dioguardi, M. Hirata
https://arxiv.org/abs/2506.09911

Microscopic investigation of enhanced Pauli paramagnetism in metallic Pu$_2$C$_3$
A combined study of the structural and electronic properties of polycrystalline Pu$_2$C$_3$ is reported based on x-ray diffraction, specific heat, magnetic susceptibility, ${}^{13}$C nuclear magnetic resonance (NMR), and band structure calculations. X-ray diffraction reveals a global noncentrosymmetric cubic lattice, with a nearest-neighbor C--C bond length of $r = 1.38$ Å. ${}^{13}$C NMR measurements indicate that the global cubic symmetry is locally broken, revealing two unique carbon enviro…

Learning from the Storm: A Multivariate Machine Learning Approach to Predicting Hurricane-Induced Economic Losses
Bolin Shen, Eren Erman Ozguven, Yue Zhao, Guang Wang, Yiqun Xie, Yushun Dong
https://arxiv.org/abs/2506.17964

Learning from the Storm: A Multivariate Machine Learning Approach to Predicting Hurricane-Induced Economic Losses
Florida is particularly vulnerable to hurricanes, which frequently cause substantial economic losses. While prior studies have explored specific contributors to hurricane-induced damage, few have developed a unified framework capable of integrating a broader range of influencing factors to comprehensively assess the sources of economic loss. In this study, we propose a comprehensive modeling framework that categorizes contributing factors into three key components: (1) hurricane characteristics…

Hat jemand gute Tipps, wie man eine Gravur in einem Ring wieder lesbar machen kann?
Wir haben einen Ring, wo die Gravur sehr abgenutzt ist, aber noch leicht erkennbar. Wir würden gerne die Buchstaben erkennen können, um die Herkunft aufzuklären.
Ist in Familienbesitz seit Jahrzehnten, also nicht gestern auf der Straße gefunden.
#FediHelp

Replaced article(s) found for gr-qc. https://arxiv.org/list/gr-qc/new
[2/2]:
- Predicting wide binaries and deviations from standard gravity using machine learning algorithms
Amoy Ashesh, Harsimran Kaur, Sandeep Aashish