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Astronomy & Astrophysics

Volume 656 (December 2021)


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Solar Orbiter First Results (Cruise Phase)

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Evidence for local particle acceleration in the first recurrent galactic cosmic ray depression observed by Solar Orbiter - The ion event on 19 June 2020 L10

DOI: https://doi.org/10.1051/0004-6361/202140966
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Radial evolution of the April 2020 stealth coronal mass ejection between 0.8 and 1 AU - Comparison of Forbush decreases at Solar Orbiter and near the Earth A1

DOI: https://doi.org/10.1051/0004-6361/202039848

Letters to the Editor

Astrophysical processes

Cosmology (including clusters of galaxies)

Extragalactic astronomy

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The LOFAR Two-metre Sky Survey Deep Fields - A new analysis of low-frequency radio luminosity as a star-formation tracer in the Lockman Hole region A48

DOI: https://doi.org/10.1051/0004-6361/202141286
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Redshift identification of X-ray-selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources A117

DOI: https://doi.org/10.1051/0004-6361/202141416

Galactic structure, stellar clusters and populations

Interstellar and circumstellar matter

Press Release
Open Access

Signatures of UV radiation in low-mass protostars - I. Origin of HCN and CN emission in the Serpens Main region A146

DOI: https://doi.org/10.1051/0004-6361/202140833

Stellar structure and evolution

Stellar atmospheres

The Sun and the Heliosphere

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Comment on “Non-interacting coronal mass ejections and solar energetic particles near the quadrature configuration of solar terrestrial relations observatory”: CME shocks are fast magnetosonic shocks and not intermediate Alfvén shocks A152

DOI: https://doi.org/10.1051/0004-6361/202141029

Planets and planetary systems

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The New Generation Planetary Population Synthesis (NGPPS) VI. Introducing KOBE: Kepler Observes Bern Exoplanets - Theoretical perspectives on the architecture of planetary systems: Peas in a pod A74

DOI: https://doi.org/10.1051/0004-6361/202140761

Atomic, molecular, and nuclear data

Astronomical instrumentation

Catalogs and data

Numerical methods and codes