Tootfinder

QSO MUSEUM III: the circumgalactic medium in Ly$\alpha$ emission around 120 $z\sim3$ quasars covering the SDSS parameter space. Witnessing the instantaneous AGN feedback on halo scales
Jay Gonz\'alez Lobos, Fabrizio Arrigoni Battaia, Aura Obreja, Guinevere Kauffmann, Emanuele Paolo Farina, Tiago Costa
https://arxiv.org/abs/2…

QSO MUSEUM III: the circumgalactic medium in Ly$α$ emission around 120 $z\sim3$ quasars covering the SDSS parameter space. Witnessing the instantaneous AGN feedback on halo scales
Recent surveys show that $z>2$ quasars are surrounded by Hydrogen Lyman-$α$ (Ly$α$) glows with diverse emission levels and extents. These seem to depend on the activity of embedded quasars, the number of active galactic nucleus (AGN) photons able to reach the halo gas or circumgalactic medium (CGM) and the physical properties of the CGM. In this framework, we present VLT/MUSE snapshot observations (45 min/source) of 59 $z\sim3$ quasars extending the long-term QSO MUSEUM campaign to fainter SD…

BBC News, AFP, the AP, and Reuters say they are "desperately concerned for our journalists in Gaza, who are increasingly unable to feed themselves" (Amy Walker/BBC)
https://www.bbc.com/news/articles/c8j1j7n72ywo

BBC News and news agencies warn journalists in Gaza at risk of starvation - BBC News
News organisations say local journalists are increasingly unable to feed themselves in Gaza, facing the same "dire circumstances as those they are covering".

Stratified Hyperbolicity of the moduli stack of stable minimal models, I
Junchao Shentu
https://arxiv.org/abs/2506.17537 https://arxi…

Stratified Hyperbolicity of the moduli stack of stable minimal models, I
In this paper, we introduce a birationally admissible stratification on the Deligne-Mumford stack of stable minimal models (e.g., the KSBA moduli stack), such that the universal family over each stratum admits a simple normal crossing log birational model. We further demonstrate that each stratum is hyperbolic in the sense that every schematic generically finite covering of any closed substack is of logarithmic general type. This provides a partial answer to C.Birkar's question regarding the gl…

Emergent field theory
Erick I. Duque
https://arxiv.org/abs/2507.16163 https://arxiv.org/pdf/2507.16163…

Emergent field theory
The uniqueness theorems for general relativity and Yang-Mills theories can be circumvented by dropping the ubiquitous, yet often implicit, assumption that physical fields, such as the spacetime metric, are fundamental. The novel concept of emergent fields makes it possible to construct modified theories of gravity and forces where the spacetime metric and strength tensor fields emerge from a covariance analysis in the canonical formulation with nontrivial relations to the fundamental phase spac…

Floer homotopy theory for monotone Lagrangians
Ciprian Mircea Bonciocat
https://arxiv.org/abs/2506.17431 https://arxiv.org/pdf/2506.1…

Floer homotopy theory for monotone Lagrangians
We circumvent one of the roadblocks in associating Floer homotopy types to monotone Lagrangians, namely the curvature phenomena occurring in high dimensions. Given $N \ge 3$ and $R$ a connective $\mathbb E_1$-ring spectrum, there is a notion of an $N$-truncated, $R$-oriented flow category, to which we associate a module prospectrum over the Postnikov truncation $τ_{\le N - 3}R$. This endows ordinary Floer cohomology with an action of the Steenrod algebra over $τ_{\le N-3}R$, and also induces …

Structural Properties and Adjacency Spectrum of Coprime Graph of Integers
Subarsha Banerjee
https://arxiv.org/abs/2506.10583 https://…

Structural Properties and Adjacency Spectrum of Coprime Graph of Integers
Let $TCG_n$ denote the coprime graph having vertex set $\{1,2,\ldots,n\}$ with any two vertices $i,j$ being adjacent if and only if $\gcd(i,j)=1$. In this article, we first study some structural properties of $TCG_n$. We study the vertex connectivity and crossing number of the coprime graph of integers. We discover a lower constraint on the multiplicity of $-1$, which appears as an eigenvalue in the adjacency matrix of $TCG_n$. We demonstrate our findings with a variety of cases. We also show t…

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star
Charles D. Kilpatrick, Aswin Suresh, Kyle W. Davis, Maria R. Drout, Ryan J. Foley, Alexander Gagliano, Wynn V. Jacobson-Galan, Ravjit Kaur, Kirsty Taggart, Jason Vazquez
https://arxiv.org/abs/2…

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star
We present follow-up imaging and spectroscopy and pre-explosion imaging of supernova (SN) 2025pht located in NGC 1637 at 12 Mpc. Our spectroscopy shows that SN 2025pht is a Type II SN with broad lines of hydrogen and with minimal line-of-sight extinction inferred from Na I D absorption. NGC 1637 was the target of several epochs of Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) imaging covering the site of SN 2025pht from 31 to 0.7 yr prior to discovery. Using a follow-up HST…

@… Ich hab eines deiner Bilder gesichtet in https://hackaday.com/2025/07/01/one-laptop-manufacturer-had-t…

French Mural Depicts Lady Liberty Covering Her Face In Shame | Crooks and Liars
https://crooksandliars.com/2025/07/new-mural-france-depicts-lady-liberty

Means of Random Variables in Lie Groups
Shiraz Khan, Jikai Ye, Gregory S. Chirikjian
https://arxiv.org/abs/2508.12030 https://arxiv.org/pdf/2508.12030

Means of Random Variables in Lie Groups
The concepts of mean (i.e., average) and covariance of a random variable are fundamental in statistics, and are used to solve real-world problems such as those that arise in robotics, computer vision, and medical imaging. On matrix Lie groups, multiple competing definitions of the mean arise, including the Euclidean, projected, distance-based (i.e., Fréchet and Karcher), group-theoretic, and parametric means. This article provides a comprehensive review of these definitions, investigates their…