Tootfinder

This https://arxiv.org/abs/2505.11386 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCV_…

MutualNeRF: Improve the Performance of NeRF under Limited Samples with Mutual Information Theory
This paper introduces MutualNeRF, a framework enhancing Neural Radiance Field (NeRF) performance under limited samples using Mutual Information Theory. While NeRF excels in 3D scene synthesis, challenges arise with limited data and existing methods that aim to introduce prior knowledge lack theoretical support in a unified framework. We introduce a simple but theoretically robust concept, Mutual Information, as a metric to uniformly measure the correlation between images, considering both macro…

SPECULOOS: five years hunting terrestrial planets around ultra-cool dwarfs
Sebasti\'an Z\'u\~niga-Fern\'andez (Astrobiology Research Unit, Universit\'e de Li\`ege, Li\`ege, Belgium), Michael Gillon (Astrobiology Research Unit, Universit\'e de Li\`ege, Li\`ege, Belgium), SPECULOOS consortium
https://arxiv.org/…

SPECULOOS: five years hunting terrestrial planets around ultra-cool dwarfs
The SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) project aims to detect temperate terrestrial planets transiting nearby ultracool dwarfs, including late M-dwarf stars and brown dwarfs, which are well-suited for atmospheric characterization using the James Webb Space Telescope (JWST) and upcoming giant telescopes like the European Extremely Large Telescope (ELT). Led by the University of Liège, SPECULOOS is conducted in partnership with the University of Cambridge, the Un…

Evidence for a sign change of the ISW effect in the very recent universe: hot voids and cold overdensities at $z<0.03$
Frode K. Hansen, Diego Garcia Lambas, Andr\'es N. Ruiz, Facundo Toscano, Luis A. Pereyra
https://arxiv.org/abs/2506.08832

Evidence for a sign change of the ISW effect in the very recent universe: hot voids and cold overdensities at $z<0.03$
We find that CMB photons passing through local voids ($z<0.03$) are hotter than expected at the $2.7-3.6σ$ level. Combined with earlier findings showing a $>5σ$ cooling of CMB photons in galactic filaments in the same redshift range, we now have possible evidence for a negative Integrated Sachs-Wolfe (ISW) effect in the very recent universe. In addition to having opposite sign, the observed amplitude is an order of magnitude larger than the predicted Rees-Sciama and ISW effects for the nearby…

The impact of applying black hole-host galaxy scaling relations to large galaxy populations
Maggie C. Huber (University of Colorado Boulder), Joseph Simon (University of Colorado Boulder), Julia M. Comerford (University of Colorado Boulder)
https://arxiv.org/abs/2506.08102

The impact of applying black hole-host galaxy scaling relations to large galaxy populations
Supermassive black holes (SMBHs) with dynamically measured masses have shown empirical correlations with host galaxy properties. These correlations are often the only method available to estimate SMBH masses and gather statistics for large galaxy populations across a range of redshifts, even though the scaling relations themselves are derived from a small subset of nearby galaxies. Depending on the scaling relation used, estimated SMBH masses can vary significantly. The most widely used scaling…

Confirmation of a non-transiting planet in the habitable zone of the nearby M dwarf L 98-59
Paul Schwarz (Institute for Astrophysics and Geophysics, Georg-August-University, G\"ottingen), Stefan Dreizler (Institute for Astrophysics and Geophysics, Georg-August-University, G\"ottingen), Ren\'e Heller (Max Planck Institute for Solar System Research, G\"ottingen)

Confirmation of a non-transiting planet in the habitable zone of the nearby M dwarf L 98-59
Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet-planet interaction. The M dwarf L 98-59 has previously been found to show evidence of five planets, three of which are transiting. Our aim is to confirm the fifth planet in this system and to refine the system characteristics namely minimum masses, radii and the orbital parameters of the planets around L 98-59. We reanalysed RV and activity d…

Bounomodes: the grazing ox algorithm for exploration of clustered anomalies
Samuel Matloob, Ayan Dutta, O. Patrick Kreidl, Swapnonel Roy, Ladislau B\"ol\"oni
https://arxiv.org/abs/2507.06960

Bounomodes: the grazing ox algorithm for exploration of clustered anomalies
A common class of algorithms for informative path planning (IPP) follows boustrophedon ("as the ox turns") patterns, which aim to achieve uniform area coverage. However, IPP is often applied in scenarios where anomalies, such as plant diseases, pollution, or hurricane damage, appear in clusters. In such cases, prioritizing the exploration of anomalous regions over uniform coverage is beneficial. This work introduces a class of algorithms referred to as bounomōdes ("as the ox grazes"), which al…

Investigation of $^{31}$P levels near the proton threshold by Nuclear Resonance Fluorescence and the impact on the $^{30}$Si(p,$\gamma$)$^{31}$P thermonuclear rate
David Gribble (UNC Chapel Hill, Triangle Universities Nuclear Laboratory), Christian Iliadis (UNC Chapel Hill, Triangle Universities Nuclear Laboratory), Robert V. F. Janssens (UNC Chapel Hill, Triangle Universities Nuclear Laboratory), Udo Friman-Gayer (Duke University, Triangle Universities Nuclear Laboratory), Akaa D. Aya…

Investigation of $^{31}$P levels near the proton threshold by Nuclear Resonance Fluorescence and the impact on the $^{30}$Si(p,$γ$)$^{31}$P thermonuclear rate
We investigated the nuclear structure of $^{31}$P near the proton threshold using Nuclear Resonance Fluorescence (NRF) to refine the properties of key resonances in the $^{30}$Si(p,$γ$)$^{31}$P reaction, which is critical for nucleosynthesis in stellar environments. Excitation energies and spin-parities were determined for several states, including two unobserved resonances at $E_r$ $=$ $18.7$~keV and $E_r$ $=$ $50.5$~keV. The angular correlation analysis enabled the first unambiguous determin…

Hypocrisie #Universités exsangues déjŠ #StandUpForScience

Choose Europe for Science : pour les scientifiques américains, un accueil en France dans des universités délabrées
Fier de lancer son initiative pour recevoir les chercheurs et chercheuses en péril aux Etats-Unis depuis le retour de Trump, Emmanuel Macron ferme les yeux sur l’état de l’écosystème de recherche français, exsangue.

High-velocity #MolecularClouds in M83: https://iopscience.iop.org/article/10.3847/1538-4357/addab7 -> Milky Way-like galaxy M83 consumes high-speed clouds: https://www.u-tokyo.ac.jp/focus/en/press/z0508_00416.html & https://news.stonybrook.edu/university/research-provides-new-insight-into-how-galaxies-evolve-over-time/ - unusually fast clouds of gas around nearby galaxy suggest extragalactic origin.

Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
S. Kaviraj, B. Bichang'a, I. Lazar, A. E. Watkins, G. Martin, R. A. Jackson
https://arxiv.org/abs/2506.03265

Nearby dwarf galaxies with extreme star formation rates: a window into dwarf-galaxy evolution in the early Universe
We study a sample of nearby (z~0.2) low-luminosity dwarf (10^7 MSun < M* < 10^8 MSun) galaxies which have extreme (0.1 - 3 MSun/yr) star formation rates (SFRs) for this mass regime, making them plausible analogues of dwarfs at z~5.5. We compare the properties of these analogues to control samples of 'normal' dwarfs, which reside on the star formation main sequence (SFMS) at z~0.2 and are matched in their stellar mass and redshift distributions to the analogue population. The analogue and normal…