Asteroseismic masses average 1.29 Msun for Ba dwarfs versus 1.96 Msun for Ba giants, supporting main-sequence accretion evolution from dwarfs to giants, though models fail to match the observed [hs/ls] ratio.
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A 6D kinematic census identifies 18 anomalous Cepheids with extreme orbits, including one possibly scattered by globular cluster E3, and finds consistency between dynamical and stellar ages.
2D hydro simulations of a red giant star find that low-frequency mixed modes below 50 microhertz carry the largest kinetic energies, unlike empirical predictions peaking near nu_max, with surface velocities matching in the less-truncated run.
DELOS applies contrastive learning to phase-folded light curves to detect shallow intermediate-to-long period transits, reporting 15.5% and 11.25% gains in combined precision-recall over BLS and TLS in low-SNR tests plus 3-80x speedups.
Homogeneous reanalysis of 145 single-star RM systems reveals mass-dependent e-λ trends: sub-Saturns eccentric and misaligned, Jupiters misaligned only when circular, and super-Jupiters aligned at all eccentricities.
First reported seismic detection of an internal magnetic field reaching approximately 4 kG in the radiative envelope of the gamma Doradus star KIC 2309579 using the variable delta Ka sensitive to Kelvin gravito-inertial modes.
A W-Net deep learning model detects asteroids in TESS data independently of trajectory by rotating training image cubes and using adaptive normalization for data scaling.
Massive black hole binary mergers produce orphaned low-frequency signals in PTA pulsar terms that can be stacked for archival multiband gravitational-wave detection.
Neural network corrects residual errors in isotopologue energy extrapolations for CO2 (MAE reduction in >87% of levels vs Marvel) and transfers patterns to improve CO predictions in >93% of samples.
Experimental serial coupling of 1DDLC coronagraph and PFN achieves 3.5e-5 contrast at 6% wavelength offset, 20x better than coronagraph alone.
A JEPA-based model with domain-informed multi-view self-distillation learns light-curve representations that outperform hand-crafted features on 15 of 16 StarEmbed metrics and adapts competitively to other irregular time-series datasets.
New G-band relation [Fe/H] = -6.93 - 6.04P + 1.65 φ31 calibrated on 72 RR Lyrae stars with spectroscopic anchors, yielding 0.00 dex bias and 0.26 dex RMS scatter.
TRAPPIST-1 flares follow a single power law N(≥E_TESS) ∝ E_TESS^{-0.753} from 10^{29} to 10^{33} erg after sensitivity corrections and bandpass conversion.
StarCLR pretrains on TESS light curves via contrastive learning on overlapping subsequences and improves variable star classification F1 scores over scratch-trained models when fine-tuned on TESS, ZTF, and Gaia.
Reassessment of 12 TTV claims finds only two systems with compelling unique solutions for the perturbing planet, six with multiple viable solutions, and two with weak evidence overall.
UMI is an asymmetric version of the Tukey bisquare estimator with upper-RMS scaling that improves transit signal recovery while running much faster on GPUs.
N-body simulations find stellar mass-loss effects dominate gravitational scattering in altering giant planet orbits around white dwarfs formed in star clusters, independent of density and initial conditions.
Two extremely low-density Jupiter-sized planets on long-period orbits around TOI-791 were confirmed via ground-based photometry and TTV-derived masses.
Synthetic spectra show that observational biases cause dipole mode visibilities to be overestimated by up to 20 percent on the red-giant branch, while partial energy preservation under magnetic damping can produce both present and absent mixed-mode signatures.
Interior structure models show 28 of 34 cold super-puffs are consistent with core accretion while six require non-standard explanations such as impacts or exo-rings.
N-body simulations show that 14 Herculis's orbital architecture requires primordial ejection of an additional massive planet.
Three accelerating stars yield one stellar companion at 166 AU, one 45 Jupiter-mass object at ~18 AU, and one 9.5 Jupiter-mass object at 6.4 AU that is 65% likely to be a planet.
Discovery and spectro-photodynamical characterization of TIC 295741342, a coplanar triply-eclipsing triple with a giant tertiary showing two degenerate evolutionary states and predicted Roche lobe overflow.
TOI-4311 hosts a 0.99-day super-Earth (1.38 R_earth, 4.5 M_earth) and 15-day sub-Neptune (2.47 R_earth), plus a candidate 38-day planet, with the dense inner planet potentially challenging formation theories given the host's galactic population.
citing papers explorer
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Unveiling the nature of barium stars. I. Asteroseismic masses and the evolutionary link between Ba dwarfs and giants
Asteroseismic masses average 1.29 Msun for Ba dwarfs versus 1.96 Msun for Ba giants, supporting main-sequence accretion evolution from dwarfs to giants, though models fail to match the observed [hs/ls] ratio.
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Revealing mixed modes in compressible hydrodynamical simulations of red giant stars
2D hydro simulations of a red giant star find that low-frequency mixed modes below 50 microhertz carry the largest kinetic energies, unlike empirical predictions peaking near nu_max, with surface velocities matching in the less-truncated run.
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Seismic signature of a magnetic field in the $\gamma$ Doradus star KIC 2309579
First reported seismic detection of an internal magnetic field reaching approximately 4 kG in the radiative envelope of the gamma Doradus star KIC 2309579 using the variable delta Ka sensitive to Kelvin gravito-inertial modes.
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Photometric metallicity of Galactic RR Lyrae stars in the Gaia DR3 era
New G-band relation [Fe/H] = -6.93 - 6.04P + 1.65 φ31 calibrated on 72 RR Lyrae stars with spectroscopic anchors, yielding 0.00 dex bias and 0.26 dex RMS scatter.
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A single power law for the TRAPPIST-1 flare distribution across four orders of magnitude in energy
TRAPPIST-1 flares follow a single power law N(≥E_TESS) ∝ E_TESS^{-0.753} from 10^{29} to 10^{33} erg after sensitivity corrections and bandpass conversion.
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StarCLR: Contrastive Learning Representation for Astronomical Light Curves
StarCLR pretrains on TESS light curves via contrastive learning on overlapping subsequences and improves variable star classification F1 scores over scratch-trained models when fine-tuned on TESS, ZTF, and Gaia.
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Oscillations of red giant stars with magnetic damping in the core. II. Mixed mode visibilities on the red-giant branch
Synthetic spectra show that observational biases cause dipole mode visibilities to be overestimated by up to 20 percent on the red-giant branch, while partial energy preservation under magnetic damping can produce both present and absent mixed-mode signatures.
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TIC 295741342: A Triply-Eclipsing Triple Star System with a Giant Tertiary
Discovery and spectro-photodynamical characterization of TIC 295741342, a coplanar triply-eclipsing triple with a giant tertiary showing two degenerate evolutionary states and predicted Roche lobe overflow.
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GSC 08227-00723: An Unusually Large PSH Excess AH Pic Candidate
GSC 08227-00723 is classified as a new AH Pic-type nova-like variable with recurrent stunted outbursts and an exceptionally large positive superhump excess of approximately 0.19.
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Inferring Asteroseismic Parameters from Short Observations Using Deep Learning: Application to TESS and K2 Red Giants
Deep learning infers Δν and ν_max from one-month TESS and K2 observations of red giants with reliable results for ~50% of Kepler/K2 samples and ~23% of TESS stars, plus ΔΠ1 for ~200 K2 young red giants that match known patterns.
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The TESS All-Sky Rotation Survey: Periods for 1,046,317 Stars Within 500 pc
The TESS All-Sky Rotation Survey provides periods for 1,046,317 stars within 500 pc, with an estimated 93% being true rotation periods, and includes a method to correct half-period aliases.
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The chemical make-up of the Sun: A 2020 vision
Revised solar photospheric abundances yield Z/X = 0.0187 with C, N, O at 8.46, 7.83, 8.69, preserving the solar modeling discrepancy and revealing a modest volatile-refractory offset from CI chondrites.
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Diversity in Evolutionary Status and Magnetic Activity among Solar-Type Twin Detached Eclipsing Binaries
Observational analysis of four nearly equal-mass detached eclipsing binaries shows diversity in evolutionary stage and magnetic activity, with new absolute parameters reported for each system.
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The Phenomenological Classification of TESS Eclipsing Binaries
A neural network classifies 20,196 TESS eclipsing binaries into 13,376 EA, 2,114 EB, and 4,706 EW systems after achieving 99% accuracy on held-out test data.
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Influence of magnetic activity on the determination of stellar parameters through asteroseismology
Magnetic activity induces frequency shifts that bias asteroseismic age estimates by up to 10% and helium abundance by up to 3% in solar-like stars.
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Revision of the Detached Eclipsing System IR Cas from TESS Observations, Ground-Based Photometry and Spectroscopy
Updated masses, spot model, and third-body candidate for the detached eclipsing binary IR Cas from combined TESS, ground photometry, and spectroscopy.
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HWO Target Stars and Systems: Activity and Rotation Catalog (ARC) of Potential Target Stars for the Habitable Worlds Observatory
Collates archival stellar activity and rotation data for potential HWO targets, finding measurements for at least 70% of high-interest systems but activity cycles for fewer than 20%.
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Progress in global helioseismology: a new light on the solar modelling problem and its implications for solar-like stars
Review of helioseismic inversions shows the solar modelling problem remains unsolved with broad implications for stellar seismology and fields relying on precise stellar parameters.
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Asteroseismology of solar-type stars
This review summarizes the development, techniques, and open questions in asteroseismology of solar-type stars whose oscillations are stochastically excited by surface convection.