A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

The simplest ΛCDM model provides a good fit to a large span of cosmological data but
harbors large areas of phenomenology and ignorance. With the improvement of the number …

This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky
Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the …

We present the cosmological implications from final measurements of clustering using
galaxies, quasars, and Ly α forests from the completed Sloan Digital Sky Survey (SDSS) …

Context. The eROSITA X-ray telescope on board the Spectrum-Poentgen-Gamma (SPG)
observatory combines a large field of view and a large collecting area in the energy range …

The spectral analysis and data products in Data Release 16 (DR16; 2019 December) from
the high-resolution near-infrared Apache Point Observatory Galactic Evolution Experiment …

Gaia Data Release 3 contains a wealth of new data products for the community.
Astrophysical parameters are a major component of this release, and were produced by the …

The Sloan Digital Sky Surveys (SDSS) have been almost continuously observing the skies
for over 20 yr, since the project began with a first phase in 1998 (SDSS-I; York et al. 2000) …

We describe the catalogs assembled and the algorithms used to populate the revised TESS
Input Catalog (TIC), based on the incorporation of the Gaia second data release. We also …

Inference of the physical properties of stellar populations from observed photometry and
spectroscopy is a key goal in the study of galaxy evolution. In recent years, the quality and …