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Astronomy & Astrophysics

Volume 648 (April 2021)


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The LOFAR Two Meter Sky Survey

First science highlights from SRG/eROSITA

Letters to the Editor

Astrophysical processes

Cosmology (including clusters of galaxies)

Extragalactic astronomy


Interstellar and circumstellar matter


Extragalactic astronomy

Open Access

Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron - IV. The quasar 3C 345 at 18 cm: Magnetic field structure and brightness temperature A82

Published online: 14 April 2021
DOI: https://doi.org/10.1051/0004-6361/202039493

Galactic structure, stellar clusters and populations

Interstellar and circumstellar matter

Stellar structure and evolution

Stellar atmospheres

The Sun and the Heliosphere

Planets and planetary systems

Free Access

TESS unveils the optical phase curve of KELT-1b - Thermal emission and ellipsoidal variation from the brown dwarf companion along with the stellar activity A71

Published online: 13 April 2021
DOI: https://doi.org/10.1051/0004-6361/202038524
Free Access

A sub-Neptune and a non-transiting Neptune-mass companion unveiled by ESPRESSO around the bright late-F dwarf HD 5278 (TOI-130) A75

Published online: 14 April 2021
DOI: https://doi.org/10.1051/0004-6361/202040034
Free Access

Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres - A comprehensive survey of transiting close-in gas giant exoplanets with warm-Spitzer/IRAC A127

Published online: 27 April 2021
DOI: https://doi.org/10.1051/0004-6361/202039708

Celestial mechanics and astrometry

Atomic, molecular, and nuclear data

Astronomical instrumentation

Catalogs and data

Numerical methods and codes