Astronomy & Astrophysics

Volume 644 (December 2020)

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Letters to the Editor

Astrophysical processes

Cosmology (including clusters of galaxies)

Open Access

Exploiting NIKA2/XMM-Newton imaging synergy for intermediate-mass high-z galaxy clusters within the NIKA2 SZ large program - Observations of ACT-CL J0215.4+0030 at z ∼ 0.9 A93

Published online: 04 December 2020

Extragalactic astronomy

Galactic structure, stellar clusters and populations

Interstellar and circumstellar matter

Stellar structure and evolution

ATOMIUM: A high-resolution view on the highly asymmetric wind of the AGB star π1Gruis - I. First detection of a new companion and its effect on the inner wind A61

Published online: 01 December 2020

Stellar atmospheres

The Sun and the Heliosphere

Planets and planetary systems

Celestial mechanics and astrometry

Atomic, molecular, and nuclear data

Open Access

Reinvestigation of the rotation-tunneling spectrum of the CH2OH radical - Accurate frequency determination of transitions of astrophysical interest up to 330 GHz A123

Published online: 10 December 2020

Astronomical instrumentation

Catalogs and data

Numerical methods and codes