1092 papers
This paper introduces a novel tomographic method to simultaneously reconstruct the bias-weighted mean electron pressure and star formation rate density by jointly modeling the thermal Sunyaev-Zeldovich effect and Cosmic Infrared Background in cross-correlations with galaxy samples, yielding redshift-dependent measurements up to that are largely consistent with FLAMINGO hydrodynamical simulations.
This paper proposes a hierarchical framework and a Fisher-like sensitivity analysis to demonstrate that modeling the redshift evolution of lens mass profiles is essential for avoiding significant biases and achieving precise cosmological constraints from upcoming LSST strong-lensing surveys.
This paper presents an alternative Baryon Acoustic Oscillation (BAO) measurement from the Dark Energy Spectroscopic Instrument's second data release using Legendre multipole representations of Lyman-alpha forest correlations, which achieves 0.96% precision on the isotropic BAO scale at with results consistent with the baseline analysis while offering a positive-definite covariance matrix and reduced nuisance parameter constraints.
This paper presents high-cadence near-infrared spectroscopy of the 2021 eruption of the recurrent nova RS Ophiuchi, characterizing the red giant secondary's pre-eruption state, the high-temperature coronal emission and continuum during the outburst, and potential post-eruption changes in the secondary star.
This paper introduces a novel community detection framework that models solar vortices as an interacting network, revealing that vortices identified as hubs, connectors, or peripherals within these communities exhibit greater persistence, height, and collective helical motion, thereby offering new insights into how collective vortex dynamics drive energy transfer and wave excitation in the upper solar atmosphere.
Despite searching for methanol in the water-rich protoplanetary disk around HL Tau using ALMA archival data, the study found no emission and derived stringent upper limits on its abundance, suggesting that optically thick dust obscures the signal or that the disk's chemical evolution differs significantly from other young stellar objects and comets.
This paper presents an automated framework utilizing the ALeRCE broker to systematically search for optical counterparts to LIGO-Virgo-KAGRA gravitational wave superevents during the O4a and O4b runs, successfully identifying several plausible candidates including a transient consistent with a Bowen fluorescence flare in an AGN.
Using a selection-aware Bayesian framework on JWST JADES data, this study reveals that the black hole-stellar mass relation at high redshift () shares the same slope and normalization as the local Universe but exhibits significantly larger intrinsic scatter, suggesting that the mean scaling was established early while the diversity of growth histories remains high.
This paper presents a new, computer-simulation-based grid of Stark-broadened profiles for 13 neutral helium lines across relevant astrophysical conditions, aiming to correct previous semi-analytical models and improve the determination of physical parameters for helium-rich stars and white dwarfs.
This paper presents a novel method for generating synthetic disk-integrated stellar absorption lines that isolate granulation effects, revealing that while line-shape diagnostics can theoretically trace convective blueshifts, their practical utility is severely limited by photon noise, thereby highlighting the need for more robust metrics and establishing a valuable testbed for high-precision radial velocity studies.
This paper introduces SELDON, a continuous-time variational autoencoder that combines masked GRU-ODE encoders, neural ODE propagators, and interpretable Gaussian-basis decoders to efficiently model sparse, irregular astrophysical light curves and extract physically meaningful parameters for rapid supernova prioritization.
This paper utilizes hydrodynamical simulations to demonstrate that galaxy-halo connection parameters, 2D projection effects, and velocity field treatments significantly bias the interpretation of Sunyaev-Zel'dovich signals around galaxies, thereby necessitating careful modeling to accurately constrain gas thermodynamics and feedback processes.
This paper demonstrates that a first-order cosmological phase transition occurring between 1 GeV and $10^6\gamma$-ray telescope constraints, with the specific outcomes depending on the fraction of kinetic energy converted into magnetohydrodynamic turbulence.
This paper demonstrates that within a general class of gravity models, particularly the Starobinsky model, the positive values of the scalar field arising from the conformal transformation provide an additional suppression mechanism for the massless modes of higher-rank antisymmetric tensor fields, thereby explaining their observational absence in the present universe.
This paper presents the first Far-UV spectrum of the T-Tauri star TW Hya obtained by the UVIT/AstroSat, demonstrating its capability to derive accretion parameters and characterize young stellar variability consistent with literature and previous space-based observatories.
This study utilizes combined cosmological datasets (BAO, CC, SNIa, and growth rate data) to constrain viscous fluid models within various gravity frameworks, finding that while exponential and logarithmic models are statistically rejected, the non-viscous power-law model remains a robust alternative to CDM.
This paper demonstrates that strong correlations between the trace and traceless parts of the energy shear tensor in positive-definite matrices allow for a refined parameterization of the initial energy overdensity, thereby explaining scatter in collapse thresholds and enabling accurate predictions of protohalo properties.
This paper presents a data-driven multilateration method that utilizes the arrival times of the first inverse beta decay neutrino events across multiple detectors, combined with a reference lightcurve from a larger detector, to rapidly estimate the direction and generate probability skymaps for Galactic core-collapse supernovae without relying on simulations.
This paper presents optical and infrared observations of the peculiar stripped-envelope supernova SN 2022jli, which exhibits a double-peaked light curve with periodic 12.5-day undulations and late-time dust emission, suggesting a scenario where a neutron star formed in a binary system powers the secondary maximum through accretion while potentially linking magnetar activity to broader features in stripped-envelope supernovae.
This paper proposes that large-scale magnetic dynamos in accretion disks generate quasi-periodic, outward-moving temperature fluctuations that successfully explain the observed UV/optical variability of AGNs, including their damped-random-walk characteristics and specific scaling relations with wavelength and black hole mass, which cannot be accounted for by reverberation models or spatially uncorrelated fluctuations.