Using simultaneous modeling of continuum lag-spectrum and broadband SED of Fairall 9 with the H0RIZON-AGN model, the authors obtain H0 = 72.4_{-3.7}^{+3.4} km s^{-1} Mpc^{-1}.
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High-redshift datasets constrain the local void gravitational redshift parameter z0 to be consistent with zero but allow the value needed for Hubble tension solution.
Re-expressing the Hubble tension via posterior-implied E(z) histories yields moderate mismatches (S_hist of 1.65 and 2.55) that correspond to only 1.1-2.1 sigma equivalents, below the usual 4.9 sigma scalar-H0 discrepancy.
New H0 = 67.0 +9.3/-7.8 km/s/Mpc from joint lens-model fit to time delays of SN Requiem and SN Encore in MACS J0138.0-2155.
Long-term multi-band photometry of SN 2019vxm shows initial thick CSM interaction, photosphere decoupling at 80-100 days, long-lasting dust emission, and a possible outer CSM rebrightening, implying a massive progenitor with extreme pre-explosion mass loss.
A single galaxy cluster lenses two quasars (one Type I at z=1.524, one dust-obscured Type II at z=1.939) into four images each, yielding a projected mass of ~3.3e14 solar masses within 500 kpc and time delays of hundreds to over 1000 days.
A convLSTM classifier identifies lensed SNe Ia in simulated LSST-like time series, reaching ~60% true-positive rate at O(10^{-4}) false-positive rate by the seventh epoch even after adding realistic PSF variations and foreground SN contaminants.
Joint analysis of DESI DR2, Pantheon+, and cosmic chronometers yields a mild statistical preference for time-varying dark energy over LambdaCDM, though constraints on the evolution remain moderate.
High-resolution Keck observations and dual-code lens modeling of the first lensed Type I superluminous supernova give sub-milliarcsecond position fits and masses of 4.44 and 0.96 times 10^11 solar masses for the primary and secondary lenses.
KiDS-Legacy cosmic shear plus external probes yields S8 = 0.816 ± 0.006 in Lambda-CDM and consistent bounds on w0, wa, sum m_nu and Omega_K with no strong preference for extensions.
A review of late-universe models concludes that DESI BAO plus uncalibrated supernovae data indicate the Hubble tension originates in new low-redshift physics.
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HOLISMOKES XXI: Detecting strongly lensed type Ia supernovae from time series of multi-band LSST-like imaging data -- Part II
A convLSTM classifier identifies lensed SNe Ia in simulated LSST-like time series, reaching ~60% true-positive rate at O(10^{-4}) false-positive rate by the seventh epoch even after adding realistic PSF variations and foreground SN contaminants.