Tootfinder

GA-NIFS: an extended [OIII] halo around the sub-Eddington quasar J1342 0928 at z=7.54
Bartolomeo Trefoloni, Stefano Carniani, Elena Bertola, Giacomo Venturi, Sandra Zamora, Eleonora Parlanti, Santiago Arribas, Andrew Bunker, St\'ephane Charlot, Francesco D'Eugenio, Peter Jakobsen, Roberto Maiolino, Michele Perna, Bruno Rodr\'iguez Del Pino, Hannah \"Ubler, Chris J. Willott, Torsten B\"oker, Giovanni Cresci, Isabella Lamperti, Madeline Marshall, Pablo G. P\'ere…

GA-NIFS: an extended [OIII] halo around the sub-Eddington quasar J1342+0928 at z=7.54
The James Webb Space Telescope (\textit{JWST}) opened a new observational window on the primordial Universe. Here we present new JWST NIRSpec integral field spectroscopy (IFS) observations of the $z=7.54$ quasar ULAS J1342+0928 obtained as part of the Galaxy Assembly with NIRSpec IFS (GA-NIFS) GTO programme. The new data-set obtained with both the prism ($R\sim100$) and the high-resolution grating ($R\sim2700$) allow for a complete description of the quasar emission from the rest-frame UV to op…

A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov
Sophie E. Deam, Michele T. Bannister, Cyrielle Opitom, Matthew M. Knight, Ryan Ridden-Harper, Darryl Z. Seligman, Alan Fitzsimmons, Aur\'elie Guilbert-Lepoutre, Emmanuel Jehin, Laurent Jorda, Michael Marsset, Youssef Moulane, Philippe Rousselot, Pierre Vernazza, Bin Yang

A portrait throughout perihelion of the NH$_2$-rich interstellar comet 2I/Borisov
The interstellar comet 2I/Borisov is the first interstellar object where compositional characterisation was possible throughout its entire perihelion passage. We report all 16 epochs of a comprehensive optical observation campaign with ESO VLT's integral field spectrograph MUSE, spanning 126 days from 2019 November 14 to 2020 March 19. The spatial dust emission of 2I/Borisov was predominantly smooth, with no seasonal effect. A jet-like feature was consistently visible. The gas production morpho…

Revealing the Unseen: The Discovery of Long-Awaited Radiation from the Intermittent Pulsar PSR B1931 24
Abdujappar Rusul, Z. G. Wen, J. P. Yuan, Ali Esamdin, X. P. Zheng, Michael Kramer
https://arxiv.org/abs/2507.04816

Revealing the Unseen: The Discovery of Long-Awaited Radiation from the Intermittent Pulsar PSR B1931+24
Pulsars are typically characterized by their stable, highly magnetized, and fast-rotating nature, which underpins their persistent radio emissions. However, the discovery of prolonged radio-quiet ("off") states in intermittent pulsars, such as PSR B1931+24, has challenged the most fundamental theory of pulsar magnetospheric emission. Despite long-term monitoring with several telescopes, continuous emission during these "off" states had not been detected in 20 years of observations. Fortunately,…

Macaulay representation of the prolongation matrix and the SOS conjecture
Zhiwei Wang, Chenlong Yue, Xiangyu Zhou
https://arxiv.org/abs/2509.04314 https://…

Macaulay representation of the prolongation matrix and the SOS conjecture
Let $z \in \mathbb{C}^n$, and let $A(z,\bar{z})$ be a real valued diagonal bihomogeneous Hermitian polynomial such that $A(z,\bar{z})\|z\|^2$ is a sum of squares, where $\|z\|$ denotes the Euclidean norm of $z$. In this paper, we provide an estimate for the rank of the sum of squares $A(z,\bar{z})\|z\|^2$ when $A(z,\bar{z})$ is not semipositive definite. As a consequence, we confirm the SOS conjecture proposed by Ebenfelt for $2 \leq n \leq 6$ when $A(z,\bar{z})$ i…

Understanding the Landscape of Ampere GPU Memory Errors
Zhu Zhu, Yu Sun, Dhatri Parakal, Bo Fang, Steven Farrell, Gregory H. Bauer, Brett Bode, Ian T. Foster, Michael E. Papka, William Gropp, Zhao Zhang, Lishan Yang
https://arxiv.org/abs/2508.03513

Understanding the Landscape of Ampere GPU Memory Errors
Graphics Processing Units (GPUs) have become a de facto solution for accelerating high-performance computing (HPC) applications. Understanding their memory error behavior is an essential step toward achieving efficient and reliable HPC systems. In this work, we present a large-scale cross-supercomputer study to characterize GPU memory reliability, covering three supercomputers - Delta, Polaris, and Perlmutter - all equipped with NVIDIA A100 GPUs. We examine error logs spanning 67.77 million GPU…

Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS
Darryl Z. Seligman, Marco Micheli, Davide Farnocchia, Larry Denneau, John W. Noonan, Toni Santana-Ros, Luca Conversi, Maxime Devog\`ele, Laura Faggioli, Adina D. Feinstein, Marco Fenucci, Tessa Frincke, Olivier R. Hainaut, Willem B. Hoogendam, Henry H. Hsieh, Theodore Kareta, Michael S. P. Kelley, Tim Lister, Du\v{s}an Mar\v{c}eta, Karen J. Meech, Francisco Oca\~na, Eloy Pe\~na-Asensio, Benjamin J. Shap…

Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS
We report initial observations aimed at the characterization of a third interstellar object candidate. This object, 3I/ATLAS -- also C/2025 N1 (ATLAS) -- , was discovered on 2025 July 1 UT and has an orbital eccentricity of $e\sim6.2$, perihelion of $q\sim 1.35$ au, inclination of $\sim175^\circ$, and hyperbolic velocity of $V_\infty\sim 60$ km s$^{-1}$. 3I/ATLAS has an absolute magnitude of $H_V\sim12$, which corresponds to a nuclear radius of $\sim10\text{ km}$, assuming an asteroid-like albe…

Replaced article(s) found for math.CV. https://arxiv.org/list/math.CV/new
[1/1]:
- Macaulay representation of the prolongation matrix and the SOS conjecture
Zhiwei Wang, Chenlong Yue, Xiangyu Zhou

Extreme Negative Polarisation of New Interstellar Comet 3I/ATLAS
Zuri Gray, Stefano Bagnulo, Galin Borisov, Yuna G. Kwon, Alberto Cellino, Ludmilla Kolokolova, Rosemary C. Dorsey, Grigori Fedorets, Mikael Granvik, Eric MacLennan, Olga Mu\~noz, Philippe Bendjoya, Maxime Devog\`ele, Simone Ieva, Antti Penttil\"a, Karri Muinonen
https://…

Extreme Negative Polarisation of New Interstellar Comet 3I/ATLAS
We present the first polarimetric observations of the third discovered interstellar object, 3I/ATLAS (C/2025 N1), obtained pre-perihelion with FORS2/VLT, ALFOSC/NOT, and FoReRo2/RCC, over a phase angle range of 7.7-22.4°. This marks the second ever polarimetric study of an interstellar object, the first distinguishing 2I/Borisov from most Solar System comets by its higher positive polarisation. Our polarimetric measurements as a function of phase angle reveal that 3I is characterised by an dee…

Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Ying-Tung Chen, Patryk Sofia Lykawka, Yukun Huang, JJ Kavelaars, Wesley C. Fraser, Michele T. Bannister, Shiang-Yu Wang, Chan-Kao Chang, Matthew J. Lehner, Fumi Yoshida, Brett Gladman, Mike Alexandersen, Edward Ashton, Young-Jun Choi, A. Paula Granados Contreras, Takashi Ito, Youngmin JeongAhn, Jianghui Ji, Myung-Jin Kim, Samantha M. Lawler, Jian Li, Zhong-Yi Lin, Hong-Kyu Moon, Surhud More, Marco Mu\~noz-Guti\…

Discovery and dynamics of a Sedna-like object with a perihelion of 66 au
Trans-Neptunian objects (TNOs) with large perihelion distances ($q > 60$ au) and semi-major axes ($a > 200$ au) provide insights into the early evolution of the solar system and the existence of a hypothetical distant planet. These objects are still rare and their detection is challenging, yet they play a crucial role in constraining models of solar system formation. Here we report the discovery of a Sedna-like TNO, 2023\,KQ$_{14}$, nicknamed `Ammonite', with $q = 66$ au, $a = 252$ au, and incl…

Initial VLT/MUSE spectroscopy of the interstellar object 3I/ATLAS
Cyrielle Opitom, Colin Snodgrass, Emmanuel Jehin, Michele T. Bannister, Erica Bufanda, Sophie E. Deam, Rosemary Dorsey, Marin Ferrais, Said Hmiddouch, Matthew M. Knight, Rosita Kokotanekova, Brayden Leicester, Micha\"el Marsset, Brian Murphy, Vincent Okoth, Ryan Ridden-Harper, Mathieu Vander Donckt, L\'ea Ferellec, Damien Hutsemekers, Manuela Lippi, Jean Manfroid, Zouhair Benkhaldoun

Initial VLT/MUSE spectroscopy of the interstellar object 3I/ATLAS
The interstellar comet 3I/ATLAS is only the third interstellar object to be discovered. Pre-perihelion measurements provide a unique opportunity to study its activity and composition, which may alter as it is heated in the coming months. We provide an initial baseline from optical spectroscopic observations obtained only two days after discovery, using the MUSE instrument on the VLT on 2025 July 3, while 3I was at 4.47 au from the Sun and 3.46 au from the Earth. These observations confirm the c…