Prépublication
· 2026 arXiv
EN
Gravitational lensing can split the signal of a binary merger into two images, which either overlap and interfere or arrive as separate events. We show that the matched-filter output of every two-image template can be straightforwardly constructed from the sig...
Digvijay Wadekar, Barak Zackay et al.
#gr-qc
Prépublication
· 2026 arXiv
EN
We report a transiting sub-Neptune candidate with a period of 36.34 days around TIC 402710280 (TYC 9041-03677-1), a K dwarf of TESS magnitude 9.24 at 66.8 pc that the Transiting Exoplanet Survey Satellite (TESS) has observed only in full-frame images. Four tra...
Rishit Vora
#astro-ph.EP
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