Free Access to the whole issue
Astronomy & Astrophysics
Volume 648 (April 2021)
The LOFAR Two Meter Sky Survey
Open Access
The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1 - I. Direction-dependent calibration and imaging A1
Published online: 07 April 2021
Free Access
The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1 - III. Host-galaxy identifications and value added catalogues A3
Published online: 07 April 2021
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The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1 - IV. Photometric redshifts and stellar masses A4
Published online: 07 April 2021
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Extremely deep 150 MHz source counts from the LoTSS Deep Fields A5
Published online: 07 April 2021
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The LOFAR Two-metre Sky Survey Deep Fields - The star-formation rate–radio luminosity relation at low frequencies A6
Published online: 07 April 2021
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LOFAR properties of SILVERRUSH Lyα emitter candidates in the ELAIS-N1 field A7
Published online: 07 April 2021
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The best of both worlds: Combining LOFAR and Apertif to derive resolved radio spectral index images A9
Published online: 07 April 2021
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The contribution of discrete sources to the sky temperature at 144 MHz A10
Published online: 07 April 2021
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Low-frequency radio spectra of submillimetre galaxies in the Lockman Hole A14
Published online: 19 April 2021
First science highlights from SRG/eROSITA
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Observations of Her X-1 in low states during SRG/eROSITA all-sky survey A39
Published online: 09 April 2021
Letters to the Editor
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Formation of giant planets with large metal masses and metal fractions via giant impacts in a rapidly dissipating disk L1
Published online: 07 April 2021
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TMC-1, the starless core sulfur factory: Discovery of NCS, HCCS, H2CCS, H2CCCS, and C4S and detection of C5S L3
Published online: 07 April 2021
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First direct identification of the barlens vertical structure in galaxy models L4
Published online: 16 April 2021
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The G-dwarf distribution in star-forming galaxies: A tug of war between infall and outflow L5
Published online: 16 April 2021
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The final orbital separation in common envelope evolution L6
Published online: 19 April 2021
Open Access
Evidence for SO2 latitudinal variations below the clouds of Venus L8
Published online: 26 April 2021
Astrophysical processes
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Coagulation of inertial particles in supersonic turbulence A52
Published online: 14 April 2021
Open Access
Inferring possible magnetic field strength of accreting inflows in EXor-type objects from scaled laboratory experiments A81
Published online: 16 April 2021
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Looking through the photoionisation wake: Vela X−1 at φorb ≈ 0.75 with Chandra/HETG A105
Published online: 21 April 2021
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Erratum
Bondi accretion for adiabatic flows onto a massive black hole with an accretion disc - The one dimensional problem (Corrigendum) C3
Published online: 27 April 2021
Cosmology (including clusters of galaxies)
Open Access
γ-ray detection toward the Coma cluster with Fermi-LAT: Implications for the cosmic ray content in the hadronic scenario A60
Published online: 12 April 2021
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Persistent homology in cosmic shear: Constraining parameters with topological data analysis A74
Published online: 14 April 2021
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Organised randoms: Learning and correcting for systematic galaxy clustering patterns in KiDS using self-organising maps A98
Published online: 20 April 2021
Extragalactic astronomy
Open Access
MAGNUM survey: Compact jets causing large turmoil in galaxies - Enhanced line widths perpendicular to radio jets as tracers of jet-ISM interaction A17
Published online: 07 April 2021
Interstellar and circumstellar matter
Open Access
A highly non-Keplerian protoplanetary disc - Spiral structure in the gas disc of CQ Tau A19
Published online: 07 April 2021
Extragalactic astronomy
Open Access
H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-ray flare in PKS 1510−089 in May 2016 A23
Published online: 07 April 2021
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A study of the H I gas fractions of galaxies at z ∼ 1 A25
Published online: 07 April 2021
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Most massive double black hole 3C 454.3 and powerful gravitational wave radiation A27
Published online: 07 April 2021
Open Access
High angular resolution polarimetric imaging of the nucleus of NGC 1068 - Disentangling the polarising mechanisms A42
Published online: 09 April 2021
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Systematic search for lensed X-ray sources in the CLASH fields A47
Published online: 09 April 2021
Open Access
Star formation quenching stages of active and non-active galaxies A64
Published online: 12 April 2021
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
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Survival in an extreme environment: Which is the closest globular cluster to the Galactic centre? A86
Published online: 16 April 2021
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Connecting X-ray nuclear winds with galaxy-scale ionised outflows in two z ∼ 1.5 lensed quasars A99
Published online: 20 April 2021
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FR-type radio sources at 3 GHz VLA-COSMOS: Relation to physical properties and large-scale environment A102
Published online: 20 April 2021
Open Access
PKS 1830–211: OH and H I at z = 0.89 and the first MeerKAT UHF spectrum A116
Published online: 23 April 2021
Open Access
The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region A117
Published online: 28 April 2021
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Erratum
SEEDisCS - I. Molecular gas in galaxy clusters and their large-scale structure: The case of CL1411.1–1148 at z ∼ 0.5 (Corrigendum) C1
Published online: 12 April 2021
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Erratum
Exploring He II λ1640 emission line properties at z ∼ 2−4 (Corrigendum) C2
Published online: 19 April 2021
Galactic structure, stellar clusters and populations
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Detection of new O-type stars in the obscured stellar cluster Tr 16-SE in the Carina Nebula with KMOS A34
Published online: 07 April 2021
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Mapping the core of the Tarantula Nebula with VLT-MUSE - II. The spectroscopic Hertzsprung-Russell diagram of OB stars in NGC 2070 A65
Published online: 13 April 2021
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Milky Way archaeology using RR Lyrae and type II Cepheids - I. The Orphan stream in 7D using RR Lyrae stars A78
Published online: 14 April 2021
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A unified scenario for the origin of spiral and elliptical galaxy structural scaling laws A124
Published online: 26 April 2021
Interstellar and circumstellar matter
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Water in star-forming regions: physics and chemistry from clouds to disks as probed by Herschel spectroscopy A24
Published online: 09 April 2021
Open Access
CO+ as a probe of the origin of CO in diffuse interstellar clouds A38
Published online: 09 April 2021
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Distribution of ionized, atomic, and PDR gas around S 1 in ρ Ophiuchus A40
Published online: 09 April 2021
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Outflows, envelopes, and disks as evolutionary indicators in Lupus young stellar objects A41
Published online: 09 April 2021
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The CALYPSO IRAM-PdBI survey of jets from Class 0 protostars - Exploring whether jets are ubiquitous in young stars A45
Published online: 09 April 2021
Open Access
Physical and chemical structure of high-mass star-forming regions - Unraveling chemical complexity with CORE: the NOEMA large program A66
Published online: 15 April 2021
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Quantum study of reaction O (3P) + H2 (v,j) → OH + H: OH formation in strongly UV-irradiated gas A76
Published online: 15 April 2021
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Carbon-chain molecule survey toward four low-mass molecular outflow sources A83
Published online: 20 April 2021
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Self-scattering on large, porous grains in protoplanetary disks with dust settling A87
Published online: 15 April 2021
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New mid-infrared imaging constraints on companions and protoplanetary disks around six young stars A92
Published online: 15 April 2021
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Keplerian disks and outflows in post-AGB stars: AC Herculis, 89 Herculis, IRAS 19125+0343, and R Scuti A93
Published online: 19 April 2021
Open Access
Transition from coherent cores to surrounding cloud in L1688 A114
Published online: 23 April 2021
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Gas phase Elemental abundances in Molecular cloudS (GEMS) - IV. Observational results and statistical trends A120
Published online: 26 April 2021
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Testing the models of X-ray driven photoevaporation with accreting stars in the Orion Nebula Cluster A121
Published online: 27 April 2021
Stellar structure and evolution
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Rotationally and tidally distorted compact stars - A theoretical approach to the gravity-darkening exponents for white dwarfs A111
Published online: 22 April 2021
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The intermediate neutron capture process - I. Development of the i-process in low-metallicity low-mass AGB stars A119
Published online: 23 April 2021
Stellar atmospheres
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Gemini/Phoenix H-band analysis of the globular cluster AL 3 A16
Published online: 07 April 2021
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New predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars - II. A grid of O-type stars in the Galaxy and the Magellanic Clouds A36
Published online: 08 April 2021
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Stochastic light variations in hot stars from wind instability: finding photometric signatures and testing against the TESS data A79
Published online: 15 April 2021
The Sun and the Heliosphere
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Transition to turbulence in nonuniform coronal loops driven by torsional Alfvén waves A22
Published online: 07 April 2021
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IRIS observations of chromospheric heating by acoustic waves in solar quiet and active regions A28
Published online: 07 April 2021
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LOFAR imaging of the solar corona during the 2015 March 20 solar eclipse A43
Published online: 09 April 2021
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Pitch-angle distribution of accelerated electrons in 3D current sheets with magnetic islands A51
Published online: 12 April 2021
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Multichannel autocalibration for the Atmospheric Imaging Assembly using machine learning A53
Published online: 13 April 2021
Planets and planetary systems
Free Access
A super-Earth on a close-in orbit around the M1V star GJ 740 - A HADES and CARMENES collaboration A20
Published online: 07 April 2021
Open Access
Gas terminal velocity from MIRO/Rosetta data using neural network approach A21
Published online: 07 April 2021
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Characterizing the dust content of disk substructures in TW Hydrae A33
Published online: 12 April 2021
Open Access
Molecular composition of comet 46P/Wirtanen from millimetre-wave spectroscopy A49
Published online: 09 April 2021
Open Access
Numerical modeling of lander interaction with a low-gravity asteroid regolith surface - II. Interpreting the successful landing of Hayabusa2 MASCOT A56
Published online: 13 April 2021
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Tracking Advanced Planetary Systems (TAPAS) with HARPS-N - VII. Elder suns with low-mass companions A58
Published online: 13 April 2021
Open Access
Medium-resolution spectrum of the exoplanet HIP 65426 b A59
Published online: 13 April 2021
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Pushing planets into an inner cavity by a resonant chain A69
Published online: 13 April 2021
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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
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Discovery of a directly imaged planet to the young solar analog YSES 2 A73
Published online: 19 April 2021
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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
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Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b - III. Changing ionisation and the emergence of an ionosphere A80
Published online: 15 April 2021
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Revisiting the analysis of HW Virginis eclipse timing data - I. A frequentist data modeling approach and a dynamical stability analysis A85
Published online: 15 April 2021
Open Access
In search of Bennu analogs: Hapke modeling of meteorite mixtures A88
Published online: 15 April 2021
Open Access
Potential asteroid discoveries by the ESA Gaia mission - Results from follow-up observations A96
Published online: 20 April 2021
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Protoplanetary disk formation from the collapse of a prestellar core A101
Published online: 20 April 2021
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HD 142527: quantitative disk polarimetry with SPHERE A110
Published online: 21 April 2021
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The fate of planetesimals formed at planetary gap edges A112
Published online: 21 April 2021
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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
Celestial mechanics and astrometry
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Relativistic modeling of atmospheric occultations with time transfer functions A46
Published online: 09 April 2021
Free Access
Secular changes in length of day: Effect of the mass redistribution A89
Published online: 15 April 2021
Open Access
Characterizing the astrometric instability of extragalactic radio source positions measured with geodetic VLBI A125
Published online: 27 April 2021
Atomic, molecular, and nuclear data
Free Access
Empirical determination of atomic line parameters of the 1.5 μm spectral region A68
Published online: 12 April 2021
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Binding energies and sticking coefficients of H2 on crystalline and amorphous CO ice A84
Published online: 15 April 2021
Astronomical instrumentation
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A search for a fifth planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE A26
Published online: 07 April 2021
Catalogs and data
Numerical methods and codes
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Transition region adaptive conduction (TRAC) in multidimensional magnetohydrodynamic simulations A29
Published online: 07 April 2021
Free Access
Machine learning technique for morphological classification of galaxies from the SDSS - I. Photometry-based approach A122
Published online: 26 April 2021