astro-ph.CO papers | Gist.Science

Prevention is better than cure? Feedback from high specific energy winds in cosmological simulations with Arkenstone

By deploying the new Arkenstone galactic wind model in cosmological simulations, this study demonstrates that high specific energy winds with energy loadings inversely scaling to halo mass effectively regulate star formation by heating the circumgalactic medium and suppressing gas accretion, achieving observational consistency with significantly lower mass loadings and supernova energy requirements than previous ejective feedback models.

Jake S. Bennett, Matthew C. Smith, Drummond B. Fielding + 6 more2026-03-11🔭 astro-ph

Probing the Cosmic Baryon Distribution and the Impact of Active Galactic Nuclei Feedback with Fast Radio Bursts in CROCODILE Simulation

Using CROCODILE hydrodynamic simulations with GADGET3/4-OSAKA, this study investigates the cosmic baryon distribution and the impact of AGN feedback by generating FRB light cones to constrain the diffuse baryon mass fraction up to z=1 and quantify how AGN-driven gas ejection reshapes the circumgalactic and intergalactic media.

Zhao Joseph Zhang, Kentaro Nagamine, Yuri Oku + 6 more2026-03-10🔭 astro-ph

A test of invariance of halo surface density for FIRE-2 simulations with cold dark matter and self-interacting dark matter

Using FIRE-2 simulations of dwarf galaxies, this study demonstrates that the dark matter halo surface density remains nearly constant across both cold and self-interacting dark matter models (with and without baryons), yielding results consistent with observational data and established scaling relations.

Sujit K. Dalui, Shantanu Desai2026-03-10🔭 astro-ph

Inflationary relics from an Ultra-Slow-Roll plateau

This paper investigates the formation of primordial black holes in ultra-slow-roll inflation scenarios with a sharp transition, revealing through numerical simulations that while both vacuum bubble and adiabatic perturbation channels contribute, the latter dominates the mass function by a factor of $10 $to$ 100$ and is primarily driven by mean profiles.

Albert Escriv�, Jaume Garriga, Shi Pi2026-03-10⚛️ hep-th

Tango of Titans: Centaurus A and M83 as a Local Group Analog

This paper establishes that the Centaurus A and M83 galaxy pair is dynamically infalling toward each other with a total mass of approximately $6.36 \times 10^{12}\, M_\odot$, confirming their status as a compelling nearby analog to the Milky Way-Andromeda system in the Local Group.

David Benisty, Noam Libeskind, Dmitry Makarov2026-03-10⚛️ gr-qc

The size and shape dependence of the SDSS galaxy bispectrum

This paper presents a measurement of the SDSS galaxy bispectrum across various triangle sizes and shapes, finding it well-described by a power law that is accurately modeled by $\Lambda$ CDM N-body simulations with a bias of 1.2, while revealing that red galaxies exhibit significantly higher bispectrum amplitudes than blue galaxies due to their stronger clustering and non-linear evolutionary interactions.

Anindita Nandi, Sukhdeep Singh Gill, Debanjan Sarkar + 3 more2026-03-06🔭 astro-ph

Scalar and vector dark matter admixed neutron stars with linear and quadratic couplings

This study employs a two-fluid formalism and Bayesian analysis of multimessenger data to investigate how linear and quadratic scalar and vector dark matter interactions influence the structure, compactness, and equation of state of dark matter admixed neutron stars, revealing that vector repulsion and quadratic scalar couplings significantly alter stellar properties compared to standard models.

Francesco Grippa, Gaetano Lambiase, Tanmay Kumar Poddar2026-03-06⚛️ hep-ph

HI Intensity Mapping cross-correlation with thermal SZ fluctuations: forecasted cosmological parameters estimation for FAST and Planck

This paper forecasts that cross-correlating thermal Sunyaev-Zel'dovich fluctuations from the Planck satellite with 21 cm intensity mapping data from the FAST telescope will significantly constrain the cosmic neutral hydrogen density, hydrostatic mass bias, and universal pressure profile parameters, thereby probing the distribution of neutral hydrogen within low-redshift galaxy clusters.

Ayodeji Ibitoye, Furen Deng, Yichao Li + 2 more2026-03-06🔭 astro-ph

Data Release 1 of the Dark Energy Spectroscopic Instrument

This paper presents DESI Data Release 1, the largest sample of extragalactic redshifts ever assembled, comprising 18.7 million objects from the first 13 months of the survey to enable precise cosmological constraints and diverse astrophysical discoveries.

DESI Collaboration, M. Abdul Karim, A. G. Adame + 307 more2026-03-06🔭 astro-ph

Constraints on Generalized Gravity-Thermodynamic Cosmology from DESI DR2

Using Pantheon+, DESy5, and DESI-DR2 data, this study finds that generalized entropic gravity-thermodynamic models are significantly disfavored compared to the standard $\Lambda$ CDM model, with the data favoring standard Bekenstein-Hawking entropy and a three-parameter formulation over more complex variants.

Udit K. Tyagi, Sandeep Haridasu, Soumen Basak2026-03-06⚛️ hep-ph

Unified Gas Heating Constraints on Extended Dark Matter Compact Objects

This paper presents a unified framework for constraining extended dark matter compact objects (EDCOs) by modeling their gravitational wakes and gas heating effects as they traverse the interstellar medium, yielding new limits on their abundance in the Leo T dwarf galaxy for masses exceeding one solar mass.

TaeHun Kim, Philip Lu, Volodymyr Takhistov2026-03-06⚛️ hep-ph

Identification of Strongly Lensed Gravitational Wave Events Using Squeeze-and-Excitation Multilayer Perceptron Data-efficient Image Transformer

This paper proposes SEMD, a deep learning model based on Vision Transformers that integrates Squeeze-and-Excitation mechanisms and multilayer perceptrons to efficiently and robustly identify strongly lensed gravitational wave events by analyzing morphological similarities in time-frequency spectrograms, thereby overcoming the computational limitations of traditional Bayesian inference methods.

Dejiang Li, Tonghua Liu, Ao Liu + 4 more2026-03-06🔭 astro-ph

Probing Light Primordial Black Holes through Non-cold Dark Matter

This paper establishes joint constraints on light primordial black holes (1g to $10^9$g) and the non-cold dark matter they produce via Hawking radiation by analyzing how the resulting ultra-relativistic dark matter smooths out small-scale structures in the matter power spectrum, even when PBHs evaporate before Big-Bang nucleosynthesis without dominating the early Universe.

Yu-Ming Chen2026-03-06⚛️ hep-ph

Inconsistencies of Tsallis Cosmology within Horizon Thermodynamics and Holographic Scenarios

This paper demonstrates that Tsallis cosmology, when applied within both the Cai-Kim thermodynamic framework and the holographic dark energy scenario, yields pathological behaviors such as negative energy densities and violations of early-universe constraints for any deviation from the standard extensive limit, thereby restricting viable models to the standard $\Lambda$ CDM cosmology.

Pedro M. Ibarbo-Perlaza., J. Bayron Orjuela-Quintana, Jose L. Palacios-Córdoba + 1 more2026-03-06🔭 astro-ph

Large-scale peculiar velocities in the universe

This paper examines the ongoing debate surrounding large-scale bulk flows in the universe, highlighting the persistent discrepancies between observed high-velocity coherent motions and the predictions of the standard $\Lambda$ CDM model, which pose significant challenges for theoretical explanations and may have influenced both structure formation and astronomical observations.

Christos G. Tsagas, Leandros Perivolaropoulos, Kerkyra Asvesta2026-03-06🔭 astro-ph

Characterization of the ionization response of argon to nuclear recoils at the keV scale with the ReD experiment

The ReD experiment utilized a compact dual-phase argon Time Projection Chamber irradiated by neutrons to model-independently measure the ionization yield of argon for nuclear recoils between 2 and 10 keV, revealing higher yields at lower energies than previously observed and extending experimental coverage crucial for detecting low-mass Dark Matter.

P. Agnes, I. Ahmad, S. Albergo + 42 more2026-03-06🔭 astro-ph

Stochastic gravitational wave from graviton bremsstrahlung in inflaton decay into massive spin 3/2 particles

This paper investigates the generation of primordial stochastic gravitational waves during the reheating period by calculating the perturbative decay of a coherently oscillating inflaton into massive spin-3/2 particles accompanied by graviton bremsstrahlung, demonstrating that the resulting gravitational wave spectra can provide insights into the microscopic physics of inflation.

Diganta Das, Mihika Sanghi, Sourav2026-03-06⚛️ hep-ph

Slow neutrinos: non-linearity and momentum-space emulation

The authors introduce the Cosmic-Enu-II emulator, which leverages a fast linear response method and non-linear perturbation theory to significantly improve the accuracy and momentum resolution of modeling massive neutrino clustering across different mass orderings, thereby enabling precise tests of neutrino free-streaming against cosmological bounds.

Amol Upadhye, Yin Li2026-03-06🔭 astro-ph

Accelerating reionization constraints: An ANN-emulator framework for the SCRIPT Semi-numerical Model

This paper introduces an efficient ANN-emulator framework for the SCRIPT semi-numerical model that reduces the computational cost of constraining the Epoch of Reionization by up to 70-fold while maintaining statistical fidelity, thereby enabling the analysis of high-dimensional models required for upcoming JWST and 21 cm datasets.

Saptarshi Sarkar, Tirthankar Roy Choudhury2026-03-06🔭 astro-ph

Search for Peak Structures in the Stochastic Gravitational-Wave Background in LIGO-Virgo-KAGRA O1-O4a Datasets

This paper presents a model-independent Bayesian search for double-peaked stochastic gravitational-wave backgrounds in LIGO-Virgo-KAGRA O1–O4a data, finding no significant evidence but establishing crucial constraints and a framework for future targeted spectral shape analyses.

Catalina-Ana Miritescu, Mario Martinez, Oriol Pujolas2026-03-06🔭 astro-ph

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