Prépublication
· 2026 arXiv
EN
In this note, we introduce the Hubble susceptibility of cosmological-collider masses, encoded in the scale dependence of the squeezed-limit oscillation. Heavy fields generically receive Hubble-induced mass corrections during inflation, and we show that the loc...
Shuntaro Aoki, Masahide Yamaguchi
#hep-th
Prépublication
· 2026 arXiv
EN
Space-borne gravitational wave (GW) detectors such as TianQin are expected to detect GW standard sirens for cosmological parameter estimation. All previous studies of TianQin adopted the $Λ$CDM model to generate mock standard siren data. In this work, we quant...
Jun-Xian Li, Shuang Wang et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The validity of linear perturbation theory and the role of backreaction in single-field inflationary models that enhance power at small scales have recently been under debate. We investigate scalar backreaction semi-analytically in a mean-field approach within...
Matteo Braglia, Gabriele Franciolini et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We present an updated analysis of non-standard neutrino self-interactions, where the interaction is effectively mediated by a heavy particle, using the latest available data from DESI and the CMB. The considered data include combinations of DESI DR1 full-shape...
Hernán E. Noriega, Josue De-Santiago et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Cosmological analyses of Stage-IV galaxy surveys require large ensembles of lightcone mock catalogues, but a full survey-scale $N$-body run costs of order $10^7$ CPU hours, putting such ensembles out of reach. We present a framework that produces survey-scale...
Mayeul Aubin, Florent Leclercq et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Though galaxy clusters are virialized and mostly in thermodynamic equilibrium, their internal gas thermodynamics are complex. The hot gas is multiphase and spatially inhomogeneous. The exact state of the gas contains important information about the internal ph...
Joey Braspenning, Annalisa Pillepich et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The Emirates Mission to the Asteroid Belt (EMA) probe is designed to perform asteroid imaging during an uncontrolled ballistic descent to (269) Justitia. The mission design is constrained by main spacecraft proximity operations, uncertain asteroid gravity, lim...
Shamil Biktimirov, Fatima Alnaqbi et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We investigate the impact of applying the uninformative Jeffreys prior in a re-analysis of DESI DR2 BAO, Planck 2018 CMB, and Type Ia Supernovae (DES-SN5YR, DES-Dovekie, Pantheon+, Union3). We incorporate this prior into new posterior inference and evidence ca...
Joshua Layton, Alex Hall et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Stacking is the standard route to signal-to-noise in cluster weak lensing, but it destroys the cluster-by-cluster information that scaling-relation studies need. We instead fit every cluster's individual $ΔΣ$ profile simultaneously, tying its mass and concentr...
André Z. Vitorelli, Eduardo S. Cypriano
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
This thesis investigates the cosmological dynamics of primordial black holes (PBHs) within the Randall--Sundrum Type II braneworld scenario. The work comprises a preliminary discussion on gravitational collapse in the small-black-hole limit at early cosmologic...
Itzi Aldecoa-Tamayo
#gr-qc
Prépublication
· 2026 arXiv
EN
The ACSIOM workshop was held in Cambridge from 10th-12th November 2025. Its primary aims were twofold: 1) to gather UK researchers involved in Mars atmospheric science to identify current shortcomings and challenges in the field, and 2) to discuss possible col...
Benjamin Benne, Megan A. J. Brown et al.
#astro-ph.IM
Prépublication
· 2026 arXiv
EN
Earth system models underpin the evidence that informs net-zero policy, yet their energy demands are rarely considered when judging model quality. Using archived output from 159 models spanning five generations of the Coupled Model Intercomparison Project (CMI...
Ioana Colfescu, Annalisa Bracco et al.
#physics.ao-ph