856 papers
Using the effective field theory of inflationary fluctuations, this paper explicitly proves for the first time that the renormalized one-loop power spectrum of the primordial curvature perturbation freezes exactly on super-horizon scales, thereby confirming the quantum-level validity of the conservation law essential for inflationary predictions.
This paper demonstrates that within the Effective Field Theory of inflation, one-loop gravitational corrections to primordial power spectra can be fully renormalized using dimensional regularization, resulting in exactly conserved scalar and tensor spectra on super-horizon scales and proving that propagation speeds remain immune to radiative corrections from gravitational nonlinearities.
This paper demonstrates that Model-Agnostic Meta-Learning (MAML) enables a cosmological emulator to rapidly adapt to new redshift distributions with minimal fine-tuning data, significantly outperforming standard single-task and non-pre-trained emulators in both accuracy and the fidelity of cosmological inference constraints.
This study presents new multi-frequency radio observations and modeling of low-redshift, metal-poor extreme starburst galaxies, revealing their flat high-frequency spectral indices and free-free absorption features to provide novel insights into dust content and the correlation between radio spectral properties and the escape of ionizing photons.
This paper evaluates the performance of the Euclid Quick Data Release (Q1) spectroscopic processing function by comparing it with DESI survey data, demonstrating high redshift accuracy and precision while emphasizing the necessity of strict quality criteria to ensure an 89% success rate for cosmological targets in the $0.9 < z < 1.8$ range.
Using Gaia DR3 proper motion data, this study identifies five Large Magellanic Cloud globular clusters with significant kinematic deviations from local stellar populations, suggesting they may have extragalactic origins resulting from past merger events or accretion from the north-eastern region, potentially triggering star formation in the Tarantula Nebula.
This paper investigates cosmological spacetimes where the spatial curvature is promoted to a time-dependent function, demonstrating that such sign-changing transitions—which allow for topological changes from closed to open universes while avoiding infinite initial energy densities—are consistent with global hyperbolicity under specific conditions and constructing three distinct geometries that exhibit these properties.
This paper presents a relativistically self-consistent analytic framework for estimating Extreme Mass-Ratio Inspirals (EMRIs) that, by generalizing the loss-cone angular momentum and revising the plunge pericenter in Schwarzschild spacetime, reveals that relativistic effects increase predicted event rates by approximately a factor of eight compared to Newtonian treatments, thereby underscoring their critical importance for space-based gravitational-wave detectors like LISA and Taiji.
This paper presents the design, production, and comprehensive optical characterization of novel light-pulse driver circuits and self-monitoring calibration instruments (both directional pulsers and isotropic P-CAL modules) developed for the Pacific Ocean Neutrino Experiment, demonstrating their high-intensity, nanosecond-scale performance and near-perfect optical isotropy through simulations and experimental validation in air and water.
This paper proposes a hybrid deep learning approach that combines matched-filtering concepts with Convolutional Neural Networks to achieve detection efficiency comparable to standard methods while significantly reducing computational costs for future gravitational-wave searches.
This paper introduces a fast, phenomenological method using time-frequency domain energy analysis and Bayesian-inspired sampling to rapidly constrain orbital eccentricity in binary black hole inspirals, demonstrating the ability to achieve estimates within 0.2 of the true value in just five minutes.
This paper develops a perturbative framework extending the Cutler-Vallisneri formalism to derive analytic corrections for timing, phase, and SNR biases caused by power spectral density drift in zero-latency gravitational-wave searches, demonstrating that these corrections are essential to prevent significant sky-localization errors and detection losses when using minimum-phase whitening.
This paper proposes a scalar shortcut method that uses exact scalar field quasinormal mode deviations as an accurate proxy for gravitational corrections in beyond-Kerr scenarios, demonstrating that current ringdown constraints can be comparable to or more stringent than black hole shadow observations while offering complementary tests of gravity.
This paper investigates elastic scattering of massless scalar waves by horizonless compact objects in curved spacetime by introducing an exact Debye-series decomposition of the scattering matrix, which reveals how Regge-Debye pole spectra and branch-cut contributions govern scattering phenomena differently in neutron-star-like versus ultracompact regimes.
This paper presents reliable black hole property estimates for approximately 450 Type-1 active galactic nuclei in the North Ecliptic Pole Wide field by utilizing mid-infrared continuum luminosities and optical line widths to effectively mitigate dust extinction effects, thereby providing crucial fiducial data for future infrared spectroscopic missions and multi-wavelength AGN studies.
This paper forecasts that combining next-generation Type Ia supernova data from the Vera C. Rubin Observatory with BAO measurements from DESI and CMB data from advanced surveys will significantly improve constraints on dark energy parameters and enable a potential 2–3σ detection of the sum of neutrino masses, offering a powerful probe for physics beyond the standard cosmological model.
This paper presents a comprehensive polarimetric study of 26 nearby molecular clouds using SOFIA/HAWC+ archival data, revealing that far-infrared dust polarization spectra depend strongly on column density and observational resolution, while indicating that magnetic fields in these parsec-scale regions are decoupled from the large-scale Galactic field.
This paper presents a data reduction methodology for the OPTICAM instrument that utilizes a 3×3-pixel median filter to effectively mitigate unpredictable warm pixels in sCMOS detectors, thereby improving photometric precision and Bayesian evidence for multiband transiting exoplanet light curves.
This study presents the first resolved molecular gas and star-formation analysis of the massive unquenched spiral UGC 8179, revealing that while it sustains standard local star-formation processes across its extended disc, its central region exhibits suppressed specific star formation rates likely driven by bulge-induced dynamical regulation.
The ODIN survey successfully validated its narrow-band selection of Lyman-alpha emitting galaxies at redshifts 2.4, 3.1, and 4.5 using DESI spectroscopy, achieving confirmation rates of 92–96% while identifying active galactic nuclei and lower-redshift emission lines as primary contaminants.