Prépublication
· 2026 arXiv
EN
We use the observed abundance and spatial clustering of JWST little red dots (LRDs) over z = 4--8 to confront two formation scenarios: the standard picture in which LRDs form in virialized dark-matter halos, and one in which they are seeded by a dynamically su...
Gert Hütsi
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Hidden sectors are generic in beyond the Standard Model constructions and string compactifications. We consider models featuring hidden sectors that have dark matter candidates. The relic density is set in part by the energy-injecting inflaton branching ratio...
Donald Liveoak, Anshuman Maharana et al.
#hep-ph
Prépublication
· 2026 arXiv
EN
It has been argued that the inverse distance ladder disfavours late-time solutions to the Hubble tension. We test this with a cosmographic expansion where $H$ is a fourth-order polynomial in $1 - a$. We combine the uncalibrated DES-Dovekie SNIa with DESI~DR2 B...
José Antonio Nájera, Indranil Banik et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Context. Short-term millimeter-wavelength variability in Class II young stellar objects (YSOs) has been considered minimal, often dismissed as very rare in ALMA-based studies on short timescales. However, recent findings suggest that variability on sub-day tim...
D. Krebs, A. Hacar et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
We present a comprehensive spectroscopic census of the Orion Nebula Cluster (ONC), based primarily on low-resolution optical spectroscopy obtained with MMT/Hectospec. We derive spectral types, youth indicators, and accretion diagnostics for 1513 stars located...
Jesús Hernández, Ezequiel Manzo-Martínez et al.
#astro-ph.SR
Prépublication
· 2026 arXiv
EN
In the standard $Λ\rm CDM$ model, the Universe will keep expanding forever and its lifetime is infinite. Therefore, even the heaviest supermassive black hole will eventually evaporate and the universal occurrence of the black hole information paradox is unavoi...
Ngo Phuc Duc Loc
#hep-ph
Prépublication
· 2026 arXiv
EN
Radio galaxies play a significant role in galaxy evolution through feedback mechanisms, making it important to characterize the environments in which they reside. We measure the cross-correlation between the positions of radio sources in the MIGHTEE survey and...
Joel Hamlett, Catherine L. Hale et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Motivated by curiosity as to whether the observed Universe at low redshifts is well described by the concordance cosmological model, we investigate the large scale angular clustering of extragalactic neutral hydrogen HI sources in the local Universe. Using the...
Felipe Avila, Camila Franco et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Personalization is essential for general-purpose robots to transition into household environments and achieve true practicality. While general robotic manipulation has been extensively studied, personalized robotic manipulation (PeRM) lacks a controlled benchm...
Zhixu Li, Keqian Tang et al.
#cs.RO
Prépublication
· 2026 arXiv
EN
Significant efforts are currently being directed toward the implementation of large-scale quantum information processors, but realizing useful quantum advantage also requires the development of efficient quantum algorithms. While for many practical problems th...
Andi Gu, Alek H. Kemeny et al.
#quant-ph
Prépublication
· 2026 arXiv
EN
Predicting how the world responds to an action requires more than what can be seen: robots must account for environmental factors that are neither directly observable nor explicitly specified, from physical properties such as friction and mass to human-defined...
Chenyuan Zhou, Yining Hong et al.
#cs.RO
Prépublication
· 2026 arXiv
EN
Generative simulation can automate robot environment construction, but physically valid environments are not necessarily useful for training. The challenge is to identify environments that address a policy's failures and supervision that helps it overcome them...
Tianjiao Yu, Zhilin Ou et al.
#cs.RO