1406 papers
By re-examining 1,405 exoplanets orbiting 1,221 stars with high-precision parameters from SWEET-Cat, this study confirms the existence of the radius valley and reveals its dependence on period, flux, stellar mass, and age, providing evidence that supports a core-powered atmospheric mass loss scenario while highlighting the need for improved stellar characterizations in future missions like PLATO.
This paper presents a 15-year multiwavelength study of the blazar OP 313, revealing that its recent intense gamma-ray activity is triggered by new jet components emerging from the core and interacting with a standing shock, with emission likely arising from inverse Compton scattering of dusty torus photons.
This study uses hydrodynamic simulations to demonstrate that, unlike main-sequence stars, giant stars undergoing deep partial tidal disruption events are captured by supermassive black holes due to energy loss driven by asymmetric mass loss from their compact cores, a process that enables repeating partial tidal disruption events and influences extreme mass ratio inspiral evolution.
This study uses 1D simulations to demonstrate that while MHD-driven discs experience less photoevaporative erosion due to limited radial spreading, their overall lifetimes are comparable to viscous discs, with the survival of dust crucial for planet formation ultimately determined by the interplay between radial spreading, inward drift, and external FUV erosion strength.
This study utilizes new spectroscopic observations and excitation modeling to determine that low-velocity exocomets in the Pictoris system transit at significantly larger distances (0.88 to 4.7 au) than previously estimated, revealing that their gaseous tails can expand and remain detectable far from the star.
Although a deep IXPE observation of magnetar 1E 1547.0-5408 revealed high X-ray polarization and spectral features suggestive of vacuum resonance, the successful modeling of polarization modulation via a rotating vector model indicates that these high polarization levels arise from geometric effects rather than providing definitive proof of vacuum birefringence, though the results continue to support the presence of QED effects in magnetars.
Using high-resolution ESPRESSO spectroscopy, researchers detected the highest-redshift H2 absorption to date at z=4.24, revealing the existence of widespread, tiny cold overdensities in the neutral medium that are typically undetectable in standard surveys.
Using high-resolution XRISM/Resolve spectroscopy, this study reveals that while the hot X-ray gas in M87's AGN-associated arms shows limited dynamical impact, the cooler uplifted gas exhibits significant velocity gradients and dispersions, supporting the uplift scenario and suggesting that AGN-driven motions in the hot ICM are short-lived.
Through 56 3D hydrodynamic simulations of ONe white dwarfs, this study identifies a critical transition density range and demonstrates that both ignition conditions and laminar flame speeds are decisive factors in determining whether electron-capture supernovae result in a thermonuclear explosion or a gravitational collapse.
This study utilizes ISW-tSZ cross-correlation data to constrain and compare thawing, tracker, and scaling-freezing quintessence models against the standard CDM cosmology, finding that while the thawing model provides the best fit, current observations remain consistent with CDM and highlight the need for future high-precision measurements to distinguish between these dark energy scenarios.
This study reveals a puzzling contradiction in the Necklace planetary nebula, where the central binary system's properties suggest a carbon-rich evolutionary history and an inflated carbon dwarf companion, yet the inner nebula observed via Hubble Space Telescope spectroscopy appears carbon-poor.
Using ALMA and VLT/MUSE observations, researchers characterize a massive, multi-phase outflow in the local merger IRAS20100-4156 driven by starburst activity that contains 40% of the system's molecular gas and shows no signs of deceleration over kiloparsec scales, suggesting ongoing acceleration mechanisms.
This study derives an analytical function based on the progressive wave picture to quantitatively link mixed mode visibilities and detectability to core damping rates in red giants, revealing that finite damping can mimic infinite damping effects and explaining observed populations with unusually low mode amplitudes.
This paper generalizes the Ellis & Baldwin formula to arbitrary luminosity and spectral distributions, demonstrating that the anomalous cosmic dipole persists beyond power-law assumptions when applied to CatWISE quasar data, thereby providing a more robust framework for interpreting future dipole measurements.
This study presents the discovery and spectroscopic confirmation of three high-redshift (–$5.6$) radio-selected star-forming galaxies using MIGHTEE and JWST COSMOS-3D data, demonstrating that their dust-independent radio emission traces intense star formation rates consistent with the main sequence and potentially triggered by mergers, thereby opening a new window for studying early Universe star formation without dust bias.
This study presents an 18-year timing analysis of the relativistic binary PSR J1906+0746 using data from six radio telescopes, yielding precise measurements of its orbital parameters and component masses consistent with a double neutron star system under general relativity, while also characterizing a large glitch and reporting a potential secular change in the projected semi-major axis that could indicate a massive, fast-rotating white dwarf companion.
This study utilizes convolutional neural networks and ensemble learning on deep HSC-SSP images to identify significantly more Galactic cirrus filaments than previous surveys, revealing that sky background over-subtraction in coadd images dims faint objects near these structures and necessitating their inclusion in background estimation algorithms.
This paper reports the first sub-solar mass compact binary search using LIGO's O4a data, which found no significant candidates but established the tightest constraints to date on merger rates and local dark matter fractions, significantly improving upon previous limits from earlier observing runs and microlensing surveys.
This paper presents a new, computationally efficient subgrid framework implemented in the {\sc arepo} code that successfully models Population III feedback and metal enrichment in early universe simulations, demonstrating convergence in star formation rates and metal distribution at high redshifts.
ALMA Band 9 observations of the MC 27/L1521F protostar reveal a previously undetected warm, dense, off-centered ring structure traced by high-excitation CO(6-5) emission, providing new insights into shock-heating and gas-magnetic field interactions during the earliest stages of star formation.