1406 papers
Using deep JWST imaging, researchers detected and characterized mature intracluster light in the distant galaxy cluster XLSSC 122 at z ~ 2, revealing that the buildup of intracluster stars was already well underway by this epoch and providing new insights into the early dynamical evolution of massive halos.
By analyzing kinematic asymmetries in approximately 6,700 MaNGA galaxies, this study reveals that environmental quenching in satellites is primarily driven by rapid gas stripping and subsequent starvation leading to compact, undisturbed structures, whereas central galaxies are quenched through internal AGN feedback and merger-driven growth.
By combining cosmological simulations with JWST mock observations, this study reveals that while galaxy mergers significantly trigger AGN activity in gas-poor environments, their observational detection via morphological signatures is hindered at higher redshifts, underscoring the necessity of integrating realistic simulations with observational data to fully understand the AGN-merger connection.
This study utilizes end-to-end simulations of CHEX-MATE-like galaxy clusters to demonstrate that while current X-ray analysis techniques can robustly recover gas density and mass profiles, they face significant challenges and potential biases in accurately measuring temperature profiles due to azimuthal variations and multi-temperature gas along the line of sight.
This paper proposes utilizing the line-of-sight shear of strong gravitational lenses detected in Stage-IV surveys as a new cosmological probe, demonstrating through analytical derivations and covariance analysis that this approach significantly enhances the standard $3\times 26\times 2$pt scheme with high signal-to-noise ratio and potential for mitigating systematic errors.
This study demonstrates that late infall onto protoplanetary disks can generate distinct spiral structures observable in scattered light and CO line emission, with gradual gas accretion producing well-defined two-armed spirals and active streamer accretion creating flocculent patterns, while noting that these surface-level perturbations generally do not significantly disrupt the midplane unless the infalling mass rivals the disk mass.
This paper demonstrates that a small mismatch between the standard analytic sound-horizon scale and the effective scale imprinted in matter clustering can introduce significant systematic biases in cosmological inference for future high-precision surveys like DESI, and proposes strategies to correct for or budget this effect.
The STIS team has updated the on-orbit sensitivity curves for the instrument's echelle modes following Servicing Mission 4 by utilizing improved CALSPECv11 flux models for the G 191-B2B standard star and releasing new blaze shift coefficients and ripple tables.
This study demonstrates that homogeneous asteroseismic modeling of eight metal-poor, -enhanced evolved stars yields consistent fundamental properties regardless of whether -enhancement is treated fully or via ad hoc metallicity corrections, while also confirming a breakdown of the scaling relation at low metallicities that necessitates detailed modeling for accurate mass and age determinations.
Using IXPE observations of the 2025-2026 outburst, this study reports the discovery of significant, strong energy-dependent X-ray polarization in the black hole binary GS 1354-64 during an intermediate state, revealing a ~4% polarization degree that increases to ~11% at higher energies and providing new insights into the accretion geometry and coronal structure of black hole X-ray binaries.
This study utilizes the latest DESI DR2 BAO and cosmic chronometer data to constrain time-varying vacuum CDM models, finding that observations strongly favor the standard CDM limit while significantly reducing parameter degeneracies and alleviating the Hubble tension.
This paper presents a multidisciplinary design optimization framework using OpenMDAO and Dymos that simultaneously optimizes low-thrust trajectories and spacecraft power systems for asteroid orbit insertion, explicitly coupling variable-specific impulse Hall thruster performance with time-varying solar power availability to overcome the limitations of traditional simplifying assumptions.
This study analyzes ACS/WFC bias frames to determine that read noise exhibits no column dependence but is influenced by row number due to accumulated dark current, while also finding that physical pre-scans have lower noise than science arrays, amplifiers A and C show an initial linear noise decrease, and masking hot pixels reduces column noise.
This study demonstrates that approximately 90% of Milky Way open clusters, particularly those with fewer than 250 stars, align with the radial acceleration relation and baryonic Tully-Fisher relation with an acceleration scale consistent with MOND predictions, suggesting that low-acceleration gravitational dynamics operate on parsec scales within the Galaxy.
This paper presents the Cataclysmic Variable Confident Catalogue (CCC), a comprehensive dataset of orbital periods for 910 cataclysmic variables and candidates derived from TESS observations, which validates existing measurements, corrects discrepancies, and provides new period determinations for the broader population.
This study utilizes multi-wavelength thermal imaging to reveal that the archetypal Pictoris debris disk exhibits a vertically thicker mid-infrared structure compared to its millimeter counterpart, a finding that challenges collisional damping models and supports a scenario driven by radiation pressure, random collisions, and secular perturbations from inner giant planets.
This study reports the discovery of a protocluster at z ≈ 4.9 and reveals that its member galaxies are significantly larger in rest-frame optical light compared to field galaxies, suggesting that dense protocluster environments at this epoch preferentially influence the structure of extended stellar populations through mechanisms like tidal interactions or accelerated star formation.
Using JWST NIRSpec and MIRI observations, this study analyzes atomic hydrogen emission in scattered light from the Class 0 protostar L1527 IRS to characterize its magnetospheric accretion, estimating an accretion rate of approximately $1\times10^{-7}~ \text{M}_\odot \text{yr}^{-1}$ and discussing implications for non-steady, asymmetric accretion processes.
This paper demonstrates that the marked power spectrum is a practical and efficient alternative to the bispectrum for extracting non-Gaussian information from galaxy redshift surveys, as it effectively breaks parameter degeneracies, accommodates standard survey geometry treatments, and allows for cosmological inference through smooth interpolation rather than complex analytical modeling.
This paper proposes that the Weibel instability, driven by photoionization-induced anisotropic electron velocity distributions during cosmological reionization, can rapidly generate seed magnetic fields in the intergalactic medium.