Tootfinder

Observability of modified threshold behavior near unitarity
Michael D. Higgins, J. Golak, R. Skibinski, K. Topolnicki, H. Witala, H. Kamada, Chris H. Greene
https://arxiv.org/abs/2505.24569

Observability of modified threshold behavior near unitarity
A number of recent references have pointed out that an N-particle system having short-range interactions at S-wave and/or P-wave unitarity can exhibit modified threshold behavior for various reactive processes. But the question of how close to unitarity one must get in order to observe such modifications has not been addressed. The present study quantities this question by treating cases involving 3- or 4-neutrons, at the physical value of the neutron-neutron singlet scattering length a and at …

Correcting for the effects of the point spread function in intra-halo light measurements and application to deep Hyper Suprime-Cam data
L. P. Garate-Nu\~nez, A. S. G. Robotham, S. Bellstedt, L. J. M. Davies
https://arxiv.org/abs/2505.24395

Correcting for the effects of the point spread function in intra-halo light measurements and application to deep Hyper Suprime-Cam data
The intra-halo light (IHL) is the diffuse stellar component that surrounds galaxies, groups, and clusters. Its formation is intimately linked to the hierarchical assembly of the system, making it a key tracer of galaxy evolution. However, the low surface brightness (LSB) of the IHL makes it challenging to detect and also to distinguish from the point spread function (PSF) effect of the telescope. In this paper, we present two independent techniques that, when combined, provide a statistically r…

Paralia Arvantias, Nafplio
#greece #nafplio #beach

This https://arxiv.org/abs/2505.22567 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A black hole in a near-pristine galaxy 700 million years after the Big Bang
The recent discovery of a large number of massive black holes within the first two billion years after the Big Bang, as well as their peculiar properties, have been largely unexpected based on the extrapolation of the properties of luminous quasars. These findings have prompted the development of several theoretical models for the early formation and growth of black holes, which are, however, difficult to differentiate. We report the metallicity measurement around a gravitationally lensed massi…