Prépublication
· 2026 arXiv
EN
We present a sound-horizon-agnostic forecast for constraints on the Hubble constant $H_0$ and the sum of the neutrino masses $Σm_ν$ from a combination of LSST-like galaxy weak lensing, Simons-Observatory-like CMB lensing, the completed DESI BAO program, and ex...
Seyed Hamidreza Mirpoorian, Helena García Escudero et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
The Lyman-$α$ (Ly$α$) forest flux power spectrum $P(k)$ is sensitive to a range of astrophysical and cosmological effects, including the thermal state of and large-scale fluctuations in the intergalactic medium and the nature of dark matter. Measuring $P(k)$ b...
Molly Wolfson, Joseph F. Hennawi et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Constraining atmospheric loss is crucial for understanding the evolution of planetary atmospheres. We report the detection of an evaporating exosphere from TOI-3884b, a super-Neptune in a polar orbit around an M4 dwarf star. We infer this evaporation from a 6....
Joe P. Ninan, Jessica Libby-Roberts et al.
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
We present an analysis of the polarized synchrotron emission at the power-spectrum level in the multipole range $30 < \ell < 130$, using the recent QUIJOTE-MFI wide survey (10-20GHz) in combination with Planck and WMAP data. The EE and BB power spectra are wel...
F. Vansyngel, J. A. Rubino-Martin et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Scattering patterns encode the structure of extended objects, as demonstrated by charged particle scattering on atomic nuclei. Gravitational wave (GW) diffraction offers an analogous probe of otherwise invisible mass distributions. At linear order in the lens...
Han Gil Choi, Sunghoon Jung et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Direct detection and characterization of exoplanet atmospheres via reflected starlight enables probes of composition of mature exoplanet systems (since flux is decoupled from age) at closer separations than via thermal emission (due to observations in visible...
Logan A. Pearce, Ewan Douglas
#astro-ph.EP
Prépublication
· 2026 arXiv
EN
The Hubble tension motivates direct tests of the internal consistency of the local distance ladder. We perform forward and backward consistency checks between Type Ia supernovae in Cepheid host galaxies and the Hubble-flow supernova sample using Pantheon+ data...
Haotian Dong, Marek Biesiada et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
A detection of primordial $B$ modes in the Cosmic Microwave Background (CMB) polarisation relies on a robust control and removal of contamination from astrophysical polarised foreground emission. We examine how much polarised extragalactic point sources may co...
Arianna Rizzieri, Giorgia Zagatti et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Cosmic filaments represent the environments in which most galaxies form and evolve. However, the spatial distribution of filaments and the link between galaxy properties and their positions relative to filaments remains unclear, particularly at high redshifts....
Qiaoyang Hao, Tao Wang et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
We calculate the relativistic axion energy density produced by the decay of a curvature-displaced Peccei--Quinn condensate in a quartic KSVZ model. We follow the radial PQ field (the saxion) as it relaxes from its inflationary minimum and determine the survivi...
Sidhartha Samtani, Amartya Sengupta
#hep-ph
Prépublication
· 2026 arXiv
EN
Gravitational waves (GWs) and 21-cm intensity mapping (IM) are emerging as complementary cosmological probes: GWs provide direct luminosity-distance measurements, while neutral-hydrogen (HI) IM traces the matter distribution in redshift space. Their synergy of...
Dounia Nanadoumgar-Lacroze, Konstantin Leyde et al.
#astro-ph.CO
Prépublication
· 2026 arXiv
EN
Recent DESI observations hint at a preference for dynamical dark energy with an equation of state that crosses the phantom divide within the Chevallier-Polarski-Linder (CPL) parameterization. In this work, we assess the consistency of the CPL parameterization...
Tian-Yang Sun, Tian-Nuo Li et al.
#astro-ph.CO