We analyzed 19 yr of R-band data of the blazar 3C 454.3 from the Whole Earth Blazar Telescope archive, along with new data from its members and from public archives such as those provided by the Small and Moderate Aperture Research Telescope System and the Steward Observatory projects to search for quasiperiodic oscillations (QPOs). We detected a

The blazar Mrk 501 still poses challenging questions for astrophysics, primarily because of the different orientations observed at pc- and kpc-scales. A much-debated issue is whether its core harbours a supermassive binary black hole (SMBBH). We remodel and reanalyse 83 data sets observed with the Very Long Baseline Array (2011-09-24─2023-07-24) at

We present a measurement of the angular baryon acoustic oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES Y6 BAO analysis. We interpret the impact of this measurement in

Gravitational lensing magnification alters the observed spatial distribution of galaxies and must be accounted for to prevent biases in cosmological probes of the large-scale structure. We investigate its effects on the Dark Energy Survey year 6 galaxy clustering and galaxy-galaxy lensing analyses using the fiducial lens (position tracer) sample

We present constraints on the normal branch of the Dvali-Gabadadze-Porrati (nDGP) braneworld gravity model from the abundance of massive galaxy clusters. On scales below the nDGP crossover scale r c, the nDGP model features an effective gravitylike fifth force that alters the growth of structure, leading to an enhancement of the halo mass function

Context. The CarbON [CII] line in post-rEionisation and ReionisaTiOn epoch (CONCERTO) instrument was a low-resolution mapping Fourier-transform spectrometer based on lumped-element kinetic inductance detector (LEKID) technology that operated at 130-310 GHz. It was installed on the 12-meter APEX telescope in Chile in April 2021 and operated until