Tootfinder

Optical Emission-Line Properties of eROSITA-selected SDSS-V Galaxies
Nadiia G. Pulatova, Evgenii Rubtsov, Igor V. Chilingarian, Hans-Walter Rix, Mariia Demianenko, Kirill A. Grishin, Ivan Yu. Katkov, Donald P. Schneider, Catarina Aydar, Johannes Buchner, Mara Salvato, Andrea Merloni, Anton M. Koekemoer, Roberto J. Assef, Claudio Ricci, Dominika Wylezalek, Damir Gasymov, William Nielsen Brandt, Castalia Alenka Negrete Pe\~naloza, Sean Morrison, Scott F. Anderson, Franz E. Bauer, Hector …

Optical Emission-Line Properties of eROSITA-selected SDSS-V Galaxies
We present and discuss optical emission line properties obtained from the analysis of Sloan Digital Sky Survey (SDSS) spectra for an X-ray selected sample of 3684 galaxies (0.002 < z < 0.55), drawn from the eRASS1 catalog. We modeled SDSS-V DR19 spectra using the NBursts full spectrum fitting technique with E-MILES simple stellar populations (SSP) models and emission line templates to decompose broad and narrow emission line components for correlation with X-ray properties. We place the galaxie…

When you are looking for some information on a web page, what do use now?
Google
Another keyword search engine (Kagi, DuckDuckGo, ...)
ChatGPT
Some other LLM-based AI query system

Exploring the fusion power plant design space: comparative analysis of positive and negative triangularity tokamaks through optimization
T. Slendebroek, A. O. Nelson, O. M. Meneghini, G. Dose, A. G. Ghiozzi, J. Harvey, B. C. Lyons, J. McClenaghan, T. F. Neiser, D. B. Weisberg, M. G. Yoo, E. Bursch, C. Holland
https://arxiv.org/abs/2507.196…

Exploring the fusion power plant design space: comparative analysis of positive and negative triangularity tokamaks through optimization
The optimal configuration choice between positive triangularity (PT) and negative triangularity (NT) tokamaks for fusion power plants hinges on navigating different operational constraints rather than achieving specific plasma performance metrics. This study presents a systematic comparison using constrained multi-objective optimization with the integrated FUsion Synthesis Engine (FUSE) framework. Over 200,000 integrated design evaluations were performed exploring the trade-offs between capital…

Using Model Predictive Control To Reduce Traffic Emissions on Urban Freeways
Alexander Hammerl, Ravi Seshadri, Thomas Kj{\ae}r Rasmussen, Otto Anker Nielsen
https://arxiv.org/abs/2506.13393

Using Model Predictive Control To Reduce Traffic Emissions on Urban Freeways
Urban traffic congestion significantly impacts regional air quality and contributes substantially to pollutant emissions. Suburban freeway corridors are a major source of traffic-related emissions, particularly nitrogen oxides (NOx) and carbon dioxide (CO2). This paper proposes a Model Predictive Control (MPC) framework aimed at emission reduction on peripheral freeway corridors. Emission rates on freeways exhibit high sensitivity to speed fluctuations and congestion recovery processes. To addr…

A "watch your replay videos" reflection assignment on comparing programming without versus with generative AI: learning about programming, critical AI use and limitations, and reflection
Sarah "Magz" Fernandez, Greg L Nelson
https://arxiv.org/abs/2507.17226

A "watch your replay videos" reflection assignment on comparing programming without versus with generative AI: learning about programming, critical AI use and limitations, and reflection
Generative AI is disrupting computing education. Most interventions focus on teaching GenAI use rather than helping students understand how AI changes their programming process. We designed and deployed a novel comparative video reflection assignment adapting the Describe, Examine, then Articulate Learning (DEAL) framework. In an introductory software engineering course, students recorded themselves programming during their team project two times: first without, then with using generative AI. S…

The Missing Hard Photons of Little Red Dots: Their Incident Ionizing Spectra Resemble Massive Stars
Bingjie Wang, Joel Leja, Harley Katz, Kohei Inayoshi, Nikko J. Cleri, Anna de Graaff, Raphael E. Hviding, Pieter van Dokkum, Jenny E. Greene, Ivo Labb\'e, Jorryt Matthee, Ian McConachie, Rohan P. Naidu, Erica J. Nelson
https://arxiv.org/…

The Missing Hard Photons of Little Red Dots: Their Incident Ionizing Spectra Resemble Massive Stars
The nature of Little Red Dots (LRDs) has largely been investigated through their continuum emission, with lines assumed to arise from a broad-line region. In this paper, we instead use recombination lines to infer the intrinsic properties of the central engine of LRDs. Our analysis first reveals a tension between the ionizing properties implied from H$α$ and HeII$\,λ$4686. The high H$α$ EWs require copious H-ionizing photons, more than the bluest AGN ionizing spectra can provide. In contrast…

#ndwgoecountdown Vortrag – Wie alt ist eigentlich der Mond?
Wer verrät schon gerne seine Alter? Der Mond jedenfalls nicht! Seit Langem bemühen sich Forschende, die Geburtsstunde unseres kosmischen Begleiters zu bestimmen. Wichtigster Anhaltspunkt: Mondgestein, von Apollo-Astronauten zurück zur Erde gebracht. Der Vortrag von Prof. Kleine gibt einen Überblick über den aktuellen …

Great thread about #Git self-hosting options:
https://jawns.club/@skyfaller/114989129643625908

THOR: a GPU-accelerated and MPI-parallel radiative transfer code
Chris Byrohl, Dylan Nelson
https://arxiv.org/abs/2507.11603 https://…

THOR: a GPU-accelerated and MPI-parallel radiative transfer code
Emission and absorption line features are important diagnostics for the physics underlying extragalactic astronomy. The interpretation of observed signatures involves comparing against forward modeled spectra from galaxy formation simulations as well as more simplified geometries, while including the complex scattering radiative transfer (RT) of resonant emission lines. Here, we present thor, a modern C++ radiative transfer code focused initially on resonant emission lines. thor is a high-perfo…