Detection of a 0.1802-day periodic signal in TESS photometry of slow-rising nova PGIR22akgylf interpreted as orbital modulation from binary distortion of the envelope during common-envelope interaction.
, year = 1974, month = mar, volume =
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Kernel density estimation improves radio source count estimation over binned methods, as shown in simulations and LOFAR data analysis, with a new AstroKDE package.
A radio-luminosity-based model of mild q decrease to z~2 from cosmic ray losses mitigates the >3σ discrepancy in MeerKAT source counts near 10 μJy with ≥2σ evidence, while bounding intrinsic scatter.
The authors produce a new all-sky Galactic emission model with synchrotron amplitude at 4.76 GHz roughly twice the Planck 2015 value, derived via Commander fitting to recent radio and microwave surveys.
Simulations show SPHEREx photometry is generally unbiased but source blending drives outliers; with brightness selection, photometric redshifts reach σ_NMAD ≈ 0.003-0.01 and cluster redshifts are recovered to |Δz|/(1+z) < 0.002 at z ≲ 0.5.
Improved VMC proper motions show SMC expansion along SE-NW axes consistent with LMC tides, radial inward motions with no rotation, and northward motion in older RGB stars from a prior interaction.
Comparison of Galactic magnetic field models to polarized synchrotron observations shows good agreement on angles but poor match on intensity, indicating local foreground structures must be incorporated.
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Improving Radio Source Count Estimation Using Kernel Density Estimation
Kernel density estimation improves radio source count estimation over binned methods, as shown in simulations and LOFAR data analysis, with a new AstroKDE package.