Astronomy & Astrophysics (A&A)

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Sky distribution of >7 million main sequence halo stars (Koppelman, H. H., & Helmi, A., 2021, A&A, 645, A69)

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Astronomy & Astrophysics is a leading international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental).

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Gaia Early Data Release 3 (open issue)
The Solar Orbiter mission (open issue)
Planck 2018 results
The LOFAR Two Meter Sky Survey (open issue)

The reduced proper motion selected halo: Methods and description of the catalogue

Helmer H. Koppelman and Amina Helmi

A&A, 645 (2021) A69

Published online: 15 January 2021
Open Access

Growing and trapping pebbles with fragile collisions of particles in protoplanetary disks

Paola Pinilla, Christian T. Lenz and Sebastian M. Stammler

A&A, 645 (2021) A70

Published online: 15 January 2021
Open Access

Multi-thermal atmosphere of a mini-solar flare during magnetic reconnection observed with IRIS

Reetika Joshi, Brigitte Schmieder, Akiko Tei, Guillaume Aulanier, Juraj Lörinčík, Ramesh Chandra and Petr Heinzel

A&A, 645 (2021) A80

Published online: 15 January 2021
The GAPS Programme at TNG - XXVIII. A pair of hot-Neptunes orbiting the young star TOI-942

I. Carleo, S. Desidera, D. Nardiello, L. Malavolta, A. F. Lanza, J. Livingston, D. Locci, F. Marzari, S. Messina, D. Turrini et al. (41 more)

A&A, 645 (2021) A71

Published online: 15 January 2021
Open Access

Analysis of full microwave propagation and backpropagation for a complex asteroid analogue via single-point quasi-monostatic data

Liisa-Ida Sorsa, Sampsa Pursiainen and Christelle Eyraud

A&A, 645 (2021) A73

Published online: 15 January 2021
Dynamics of charged dust in the orbit of Venus

Lei Zhou, Christoph Lhotka, Catalin Gales, Yasuhito Narita and Li-Yong Zhou

A&A, 645 (2021) A63

Published online: 15 January 2021
Astrometric measurement and reduction of Pulkovo photographic observations of the main Saturnian satellites from 1972 to 2007 in the Gaia reference frame

M. Yu. Khovritchev, V. Robert, N. V. Narizhnaya, T. A. Vasilyeva, A. A. Apetyan and D. A. Bikulova

A&A, 645 (2021) A76

Published online: 15 January 2021
Free Access

Comprehensive rotational study and astronomical search for cyclopropanecarboxaldehyde

C. Cabezas, E. M. Neeman, B. Tercero, C. Bermúdez and J. Cernicharo

A&A, 645 (2021) A75

Published online: 15 January 2021

Most downloaded articles

2823	Free Access X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnant Lidia M. Oskinova, Vasilii V. Gvaramadze, Götz Gräfener, Norbert Langer and Helge Todt A&A, 644 (2020) L8 Published online: 14 December 2020
525	Press Release Free Access The SOPHIE search for northern extrasolar planets - XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain N. C. Hara, F. Bouchy, M. Stalport, I. Boisse, J. Rodrigues, J.-B. Delisle, A. Santerne, G. W. Henry, L. Arnold, N. Astudillo-Defru et al. (25 more) A&A, 636 (2020) L6 Published online: 16 April 2020
469	Free Access The FORS1 catalogue of stellar magnetic field measurements S. Bagnulo, L. Fossati, J. D. Landstreet and C. Izzo A&A, 583 (2015) A115 Published online: 04 November 2015
270	Press Release Free Access Probing cosmic isotropy with a new X-ray galaxy cluster sample through the L_X–T scaling relation K. Migkas, G. Schellenberger, T. H. Reiprich, F. Pacaud, M. E. Ramos-Ceja and L. Lovisari A&A, 636 (2020) A15 Published online: 08 April 2020
236	Free Access The Kepler characterization of the variability among A- and F-type stars - I. General overview K. Uytterhoeven, A. Moya, A. Grigahcène, J. A. Guzik, J. Gutiérrez-Soto, B. Smalley, G. Handler, L. A. Balona, E. Niemczura, L. Fox Machado et al. (31 more) A&A, 534 (2011) A125 Published online: 19 October 2011

Volume 645 (January 2021)(open volume)
1. Plasma flow velocity and magnetic field in vortices (Yadav, N., et al., 2021, A&A, 645, A3)
2. Herschel view of the star-forming regions in Perseus (Pezzuto, S., et al., 2021, A&A, 645, A55)
3. Sky distribution of >7 million main sequence halo stars (Koppelman, H. H., & Helmi, A., 2021, A&A, 645, A69)
See the table of contents
Volume 644 (December 2020)
1. Molecular-cloud origin from atomic-shell compression (Bracco, A., et al., 644, A5)
2. Dust trail from asteroid disruption in Earth atmosphere (Borovička, J., et al., 644, A58)
3. T Tauri observed by SPHERE-IRDIS at 2110 nm (Kasper, M., et al., 644, A114)
4. Hot solar coronal loops: How do they originate? (Chitta, L. P., et al., 644, A130)
See the table of contents
Volume 643 (November 2020)
1. Collage of redshift z ∼ 5 galaxies imaged by the ALPINE survey in the [CII] 158 μm line with ALMA (Le Fèvre, O., et al., 643, A1)
2. Stellar properties of the retrograde and prograde Milky Way disc (Kordopatis, G., et al., 643, A69)
3. NGC 1316 and the Villarica volcano – dusty outflows (Richtler, T., et al., 643, A120)
4. Changing radio beam pattern of pulsar B in the Double Pulsar (Noutsos, A., et al., 643, A143)
See the table of contents

4303	Press Release Free Access The search for radio emission from the exoplanetary systems 55 Cancri, υ Andromedae, and τ Boötis using LOFAR beam-formed observations Jake D. Turner, Philippe Zarka, Jean-Mathias Grießmeier, Joseph Lazio, Baptiste Cecconi, J. Emilio Enriquez, Julien N. Girard, Ray Jayawardhana, Laurent Lamy, Jonathan D. Nichols and Imke de Pater A&A, 645 (2021) A59 Published online: 14 January 2021
3072	Free Access X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnant Lidia M. Oskinova, Vasilii V. Gvaramadze, Götz Gräfener, Norbert Langer and Helge Todt A&A, 644 (2020) L8 Published online: 14 December 2020
1803	Free Access The FORS1 catalogue of stellar magnetic field measurements S. Bagnulo, L. Fossati, J. D. Landstreet and C. Izzo A&A, 583 (2015) A115 Published online: 04 November 2015
1154	Highlight Free Access Parsec-scale properties of the radio brightest jetted AGN at z > 6 C. Spingola, D. Dallacasa, S. Belladitta, A. Caccianiga, M. Giroletti, A. Moretti and M. Orienti A&A, 643 (2020) L12 Published online: 11 November 2020
1083	First science highlights from SRG/eROSITA Press Release Free Access The Abell 3391/95 galaxy cluster system. A 15 Mpc intergalactic medium emission filament, a warm gas bridge, infalling matter clumps, and (re-) accelerated plasma discovered by combining SRG/eROSITA data with ASKAP/EMU and DECam data T.H. Reiprich, A. Veronica, F. Pacaud, M.E. Ramos-Ceja, N. Ota, J. Sanders, M. Kara, T. Erben, et al. A&A, Forthcoming article Received: 04 October 2020 / Accepted: 03 November 2020

4303	Press Release Free Access The search for radio emission from the exoplanetary systems 55 Cancri, υ Andromedae, and τ Boötis using LOFAR beam-formed observations Jake D. Turner, Philippe Zarka, Jean-Mathias Grießmeier, Joseph Lazio, Baptiste Cecconi, J. Emilio Enriquez, Julien N. Girard, Ray Jayawardhana, Laurent Lamy, Jonathan D. Nichols and Imke de Pater A&A, 645 (2021) A59 Published online: 14 January 2021
3487	Open Access Low-cost precursor of an interstellar mission René Heller, Guillem Anglada-Escudé, Michael Hippke and Pierre Kervella A&A, 641 (2020) A45 Published online: 09 September 2020
3082	Free Access RefleX: X-ray absorption and reflection in active galactic nuclei for arbitrary geometries S. Paltani and C. Ricci A&A, 607 (2017) A31 Published online: 01 November 2017
3072	Free Access X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnant Lidia M. Oskinova, Vasilii V. Gvaramadze, Götz Gräfener, Norbert Langer and Helge Todt A&A, 644 (2020) L8 Published online: 14 December 2020
2538	Planck 2018 results Free Access Planck 2018 results - VI. Cosmological parameters Planck Collaboration, N. Aghanim, Y. Akrami, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini, A. J. Banday, R. B. Barreiro, N. Bartolo et al. (172 more) A&A, 641 (2020) A6 Published online: 11 September 2020

Latest highlightsAll

Latest volumeAll

PUBLISH WITH A&A

Latest highlightsAll

Latest volumeAll

PUBLISH WITH A&A

Latest special issuesAll

Most downloaded articles

The Abell 3391/95 galaxy cluster system. A 15 Mpc intergalactic medium emission filament, a warm gas bridge, infalling matter clumps, and (re-) accelerated plasma discovered by combining SRG/eROSITA data with ASKAP/EMU and DECam data

Volume 645 (January 2021)(open volume)

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