astro-ph.CO papers | Gist.Science

Modeling gravitational wave sources in the MillenniumTNG simulations

This paper introduces a flexible, parallel framework called Arepo-GW that integrates binary population synthesis with hydrodynamic simulations to generate gravitational wave event catalogs, demonstrating its application on the MillenniumTNG suite to reveal merger rates and progenitor properties consistent with current observations while highlighting specific discrepancies in binary black hole merger rates and redshift evolution.

Federico Marinacci, Marco Baldi, Giuliano Iorio + 5 more2026-03-04🔭 astro-ph

Unveiling the evolution of the CO excitation ladder through cross-correlation of CONCERTO-like experiments and galaxy redshift surveys

This study demonstrates that cross-correlating CONCERTO-like millimeter-wave line-intensity mapping data with galaxy redshift surveys can accurately recover the cosmic CO excitation ladder and molecular gas density up to $z=3$ , although the specific CONCERTO experiment lacks the sensitivity to detect the required cross-power spectra.

Mathilde Van Cuyck, Matthieu Bethermin, Guilaine Lagache + 1 more2026-03-04🔭 astro-ph

Mitigating gain calibration errors from EoR observations with SKA1-Low AA*

This paper presents a post-calibration mitigation strategy combining Gaussian Process Regression, Principal Component Analysis, and foreground avoidance to address residual foregrounds from gain calibration errors in SKA1-Low AA* observations, demonstrating that the 21-cm signal can be recovered within 2 $\sigma$ accuracy for calibration errors up to 1% across the $0.05 \leq k \leq 0.5 $Mpc$ ^{-1}$ scale range.

Eeshan Beohar, Abhirup Datta, Anshuman Tripathi + 2 more2026-03-04🔭 astro-ph

Breaking Eternal Inflation: Empirical Viability of a Spontaneous Collapse Scenario

This paper demonstrates that a spontaneous quantum collapse model, constrained by Planck 2018 data, successfully explains the origin of primordial cosmic structures and the low- $\ell$ CMB power anomaly while simultaneously eliminating the problem of eternal inflation.

María Pía Piccirilli, Gabriel León, Rosa-Laura Lechuga-Solis + 1 more2026-03-04🔭 astro-ph

Euclid Quick Data Release (Q1). Searching for giant gravitational arcs in galaxy clusters with mask region-based convolutional neural networks

This paper introduces ARTEMIDE, an open-source Mask R-CNN framework that successfully automates the detection and segmentation of strong gravitational lensing arcs in Euclid's Quick Data Release, achieving high precision and recall while demonstrating the viability of deep learning for analyzing massive wide-field survey datasets.

Euclid Collaboration, L. Bazzanini, G. Angora + 306 more2026-03-04🔭 astro-ph

Stochastic Limit of Growing Gravitational Wave Memory from Sources in the Early Universe and Astrophysical Sources

This paper demonstrates that stochastic gravitational wave memory from early universe and astrophysical sources exhibits a fractional Brownian motion scaling ( $t^H$ with $H > 1/2$ ) that grows faster than standard Brownian motion, offering a distinct signature to extract these signals from PTA data and probe post-Big Bang conditions.

Lydia Bieri2026-03-04🔭 astro-ph

Flexible Simulation Based Inference for Galaxy Photometric Fitting with Synthesizer

This paper introduces Synference, a fast and flexible Python framework that utilizes simulation-based inference to efficiently infer galaxy physical properties and photometric redshifts from multi-band photometry, achieving a ~1700-fold speedup over traditional methods while maintaining high accuracy and calibration.

Thomas Harvey, Christopher C. Lovell, Sophie Newman + 13 more2026-03-04🔭 astro-ph

The impact of supermassive black holes on exoplanet habitability: I. Spanning the natural mass range

This study demonstrates that the mass of a central supermassive black hole and a planet's distance from the galactic center critically determine exoplanet habitability by driving atmospheric heating, mass loss, and severe ozone depletion, particularly through energy-driven winds from active galactic nuclei.

Jourdan Waas, Eric S. Perlman, Manasvi Lingam + 5 more2026-03-04🔭 astro-ph

Numerical tiling-based simulations of decoherence in multifield models of inflation

This paper presents a numerically stable and flexible framework for simulating decoherence in multifield inflationary models by implementing open-system effects via the Lindblad equation, enabling the study of primordial scalar perturbations without relying on the slow-roll approximation and facilitating compatibility with nonlinear numerical codes.

Johor D. Peñalba Quispitupa, Guillermo F. Quispe Peña, Jose T. Galvez Ghersi2026-03-04⚛️ quant-ph

Detecting the signature of helium reionization through 3HeII 3.46cm line-intensity mapping

This paper evaluates the detectability of the 3.46 cm helium line for tracing helium reionization using hydrodynamical simulations and forecasts, concluding that while current facilities struggle to distinguish reionization scenarios due to signal faintness and instrumental noise, next-generation high-sensitivity surveys like PUMA could achieve meaningful constraints within reasonable integration times.

Benedetta Spina, Cristiano Porciani, Sarah E. I. Bosman + 4 more2026-03-04🔭 astro-ph

Revisiting model-independent constraints on spatial curvature and cosmic ladders calibration: updated and forecast analyses

This paper presents an updated model-independent analysis of spatial curvature and cosmic ladder calibration using DESY5, DESI, and cosmic chronometer data, finding a mild tension with a flat universe while forecasting that future surveys like LSST and Euclid could significantly improve constraints on key cosmological parameters and resolve the Hubble tension.

Arianna Favale, Adri� Gómez-Valent, Marina Migliaccio2026-03-04🔭 astro-ph

Forecasting Constraint on Primordial Black Hole Properties with the CSST $3\times2$pt Analysis

This study forecasts that the upcoming Chinese Space Station Survey Telescope (CSST) will significantly constrain the properties of primordial black holes as dark matter candidates, achieving tight limits on the product of their fraction and mass ( $f_{\rm PBH}m_{\rm PBH}$ ) and precise measurements of key cosmological parameters through a comprehensive $3\times2$pt analysis of galaxy clustering, weak lensing, and galaxy-galaxy lensing.

Dingao Hu, Yan Gong, Pengfei Su + 4 more2026-03-04🔭 astro-ph

The ANDICAM-SOFI Near-infrared and Optical type Ia Supernova (ASNOS) sample: Description and data release

This paper presents the ASNOS dataset, a comprehensive collection of optical and near-infrared photometry for 41 Type Ia supernovae at low redshift, detailing the sample selection, data reduction, and light-curve fitting methods used to facilitate future cosmological analysis.

Kim Phan, Lluís Galbany, Tomás E. Müller-Bravo + 13 more2026-03-04🔭 astro-ph

Probing the Warm Dark Matter mass with [C II] intensity mapping

This paper forecasts the potential of [C II] line-intensity mapping surveys to constrain the mass of Warm Dark Matter particles, demonstrating that while current and near-future surveys can set lower limits on the particle mass, achieving competitive constraints comparable to other methods will require combining multiple redshifts and emission lines with advanced survey capabilities.

Elena Marcuzzo, Cristiano Porciani, Emilio Romano-Díaz + 3 more2026-03-04🔭 astro-ph

Magnetic field spreading from stellar and galactic dynamos into the exterior

This paper proposes that magnetic fields spreading diffusively from stellar and galactic dynamos into their turbulent, poorly conducting exteriors form confined magnetospheres with distinct decay properties and expansion dynamics that differ from standard potential or force-free models, thereby ruling out such fields as the source of intergalactic void magnetization.

Axel Brandenburg, Oindrila Ghosh, Franco Vazza + 1 more2026-03-04🔭 astro-ph

Nanohertz Gravitational Waves

This paper explores the physics of nanohertz gravitational wave signals recently detected by pulsar timing arrays, examining their potential astrophysical origins from massive black-hole binaries and cosmological origins from early Universe phenomena to constrain high-energy physics and deepen our understanding of the cosmos.

Alberto Sesana, Daniel G. Figueroa2026-03-04🔭 astro-ph

Revealing the intricacies of radio galaxies and filaments in the merging galaxy cluster Abell 2255. II. Properties of filaments using multi-frequency radio data

By combining high-resolution LOFAR-VLBI, uGMRT, and VLA multi-frequency data, this study reveals the complex spectral, morphological, and polarized properties of filaments in the merging galaxy cluster Abell 2255, identifying steep-spectrum extensions up to 250 kpc and highlighting the Original TRG as the primary driver of these structures.

E. De Rubeis, M. Bondi, A. Botteon + 11 more2026-03-04🔭 astro-ph

Weak lensing of bright standard sirens: prospects for $σ_8$

This paper demonstrates that incorporating weak lensing into bright standard siren analyses enables the measurement of the matter perturbation parameter $\sigma_8$ , with future observatories like the Einstein Telescope and LISA potentially achieving 10% and 30% accuracy, respectively, given sufficient populations of neutron star and massive black hole binaries with electromagnetic counterparts.

Ville Vaskonen2026-03-04🔭 astro-ph

More power on large scales

This paper proposes that primordial black holes (PBHs) as macroscopic dark matter, which begin clustering before matter-radiation equality and lose mass via Hawking radiation, can simultaneously explain the unexpectedly high cosmic microwave dipole and galaxy bulk flows while reducing the Hubble tension by altering the early universe's sound horizon.

Jeremy Mould2026-03-04🔭 astro-ph

MUSE-ALMA Haloes XIII. Molecular gas in $z \sim 0.5$ HI-selected galaxies

The MUSE-ALMA Haloes survey significantly expands the sample of HI-selected galaxies at $z \sim 0.5$ by doubling the number of CO detections, revealing a dual star formation efficiency where low-mass systems follow main-sequence relations while high-mass systems exhibit suppressed activity, thereby offering crucial insights into the baryon census and galaxy evolution at this redshift.

Victoria Bollo, Celine Peroux, Martin Zwaan + 11 more2026-03-04🔭 astro-ph

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