Astronomy & Astrophysics (A&A)

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ARKS debris discs: dust (orange) and CO gas (blue) (Marino et al., 2026, 705, A195 ; Mac Manamon et al., 2026, 705, A198 ; and the ARKS collaboration)

Astronomy & Astrophysics is published under Subscribe to Open (S2O). S2O is a subscription open access model that relies on library contributions to make content open access for the benefit of the research community. The open access status of the journal is reviewed every year. A&A remains Open Access in 2025 under the Subscribe to Open (S2O) model.
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Latest special issuesAll

Euclid Quick Data Release (Q1) (in progress)
Solar Orbiter First Results (Nominal Mission Phase) (in progress)
ZTF SN Ia DR2

Open Access

Broad-band modelling of the GRB 230812B afterglow: Implications for very-high-energy γ-ray detections with IACTs

S. Mohnani, B. Banerjee, D. Miceli, L. Nava, G. Oganesyan, P. Tiwari, A. Ierardi, A. L. De Santis, S. Macera, A. Shukla et al. (6 more)

A&A, 705 (2026) A227

Published online: 20 January 2026
Open Access

Exploring the connection between compact object mergers and fast X-ray transients - The cases of LXT 240402A and EP250207b

R. L. Becerra, Y.-H. Yang, E. Troja, M. El Kabir, S. Dichiara, N. Passaleva, B. O’Connor, R. Ricci, C. Fryer, L. Hu et al. (22 more)

A&A, 705 (2026) A233

Published online: 20 January 2026
Open Access

Environments of high and low excitation radio galaxies

C. Lopez, D. Ponce and E. Donoso

A&A, 705 (2026) A192

Published online: 20 January 2026
Open Access

Gravity-selected galaxy clusters: A tight mass-richness relation and an unclear Compton Y-richness trend

S. Andreon and M. Radovich

A&A, 705 (2026) A208

Published online: 20 January 2026
Open Access

A search for cold molecular outflows in cosmic-noon galaxies

I. Langan, G. Popping, M. Ginolfi, S. Weng, F. Valentino, G. C. Jones and J. Scholtz

A&A, 705 (2026) A209

Published online: 20 January 2026
Open Access

J-PAS: A neural network approach to single stellar population characterisation

H. Domínguez Sánchez, P. Coelho, G. Bruzual, A. Hernán-Caballero, C. López Sanjuan, J. A. Fernandez-Ontiveros, L. A. Díaz-García, L. Suelves, A. Álvarez-Candal, I. Breda et al. (21 more)

A&A, 705 (2026) A219

Published online: 20 January 2026
Press Release
Open Access

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - I. Motivation, sample, data reduction, and results overview

S. Marino, L. Matrà, A. M. Hughes, J. Ehrhardt, G. M. Kennedy, C. del Burgo, A. Brennan, Y. Han, M. R. Jankovic, J. B. Lovell et al. (32 more)

A&A, 705 (2026) A195

Published online: 20 January 2026
Open Access

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - III. The vertical structure of debris disks

B. Zawadzki, A. Fehr, A. M. Hughes, E. Mansell, J. Kittling, Y. Han, C. Hou, M. Pan, J. Milli, J. Olofsson et al. (30 more)

A&A, 705 (2026) A197

Published online: 20 January 2026

Most downloaded articles

4108	Free Access The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU J. Helbert, H. Rauer, D. C. Boice and W. F. Huebner A&A, 442 3 (2005) 1107-1120 Published online: 14 October 2005
3329	Free Access Near-IR imaging toward a puzzling young stellar object precessing jet S. Paron, C. Fariña and M. E. Ortega A&A, 593 (2016) A132 Published online: 05 October 2016
2763	Open Access Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope R. de la Fuente Marcos, M. R. Alarcon, J. Licandro, M. Serra-Ricart, J. de León, C. de la Fuente Marcos, G. Lombardi, A. Tejero, A. Cabrera-Lavers, S. Guerra Arencibia and I. Ruiz Cejudo A&A, 700 (2025) L9 Published online: 05 August 2025
2433	Free Access A long term spectroscopic and photometric study of the old nova HR Delphini M. Friedjung, M. Dennefeld and I. Voloshina A&A, 521 (2010) A84 Published online: 25 October 2010
1728	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

Volume 705 (January 2026) (in progress)
1. A microquasar shuts down, forming a remnant (Abaroa, L., et al., 2026, A&A, 705, L4)
2. Images zooming in on the main galaxy of the cluster (Han, S., et al., 2026, A&A, 705, A169)
3. ARKS debris discs: dust (orange) and CO gas (blue) (Marino et al., 2026, 705, A195 ; Mac Manamon et al., 2026, 705, A198 ; and the ARKS collaboration)
See the table of contents
Volume 704 (December 2025)
1. Diffuse X-rays near PeVatron 1LHAASO J1740+0948u (Brunelli, G., et al., 2025, A&A, 704, A30)
2. The 8 lensed quasars used for measuring H₀ (TDCOSMO Collaboration, 2025, A&A, 704, A63)
3. JWST-MIRI Spectra of the Delorme 1 system (Mâlin, M., 2025, A&A, 704, A181)
4. Filamentary structure in the Galactic CO emission (Soler, J. D., et al., 2025, A&A, 704, A164)
5. Simulation of a major merger of two dwarf galaxies (Deng, Y., et al., 2025, A&A, 704, A240)
6. M87 ring and magnetic field evolution (2017–2021) (The Event Horizon Telescope Collaboration, 2025, A&A, 704, A91)
7. JWST traces dust evolution at Horsehead's edge (Elyajouri, M., et al., 2025, A&A, 704, A203)
8. Diffuse Galactic cirrus across dust tracers (Liu, Q., et al., 2025, A&A, 704, A269)
See the table of contents
Volume 703 (November 2025)
1. Simulation of a supernova remnant in Cygnus OB2 (Härer, L., et al., 2025, A&A, 703, A111)
2. HST+JWST color image of the cluster lens A370 (Diego, J. M., et al., 2025, A&A, 703, A207)
See the table of contents

12143	Free Access A long term spectroscopic and photometric study of the old nova HR Delphini M. Friedjung, M. Dennefeld and I. Voloshina A&A, 521 (2010) A84 Published online: 25 October 2010
11346	Free Access The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU J. Helbert, H. Rauer, D. C. Boice and W. F. Huebner A&A, 442 3 (2005) 1107-1120 Published online: 14 October 2005
7610	Open Access Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope R. de la Fuente Marcos, M. R. Alarcon, J. Licandro, M. Serra-Ricart, J. de León, C. de la Fuente Marcos, G. Lombardi, A. Tejero, A. Cabrera-Lavers, S. Guerra Arencibia and I. Ruiz Cejudo A&A, 700 (2025) L9 Published online: 05 August 2025
5168	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
3922	Open Access JWST reveals a supernova following a gamma-ray burst at z ≃ 7.3 A. J. Levan, B. Schneider, E. Le Floc’h, G. Brammer, N. R. Tanvir, D. B. Malesani, A. Martin-Carrillo, A. Rossi, A. Saccardi, A. Sneppen et al. (43 more) A&A, 704 (2025) L8 Published online: 09 December 2025

21862	Free Access A long term spectroscopic and photometric study of the old nova HR Delphini M. Friedjung, M. Dennefeld and I. Voloshina A&A, 521 (2010) A84 Published online: 25 October 2010
19124	Free Access SDSS-based taxonomic classification and orbital distribution of main belt asteroids J. M. Carvano, P. H. Hasselmann, D. Lazzaro and T. Mothé-Diniz A&A, 510 (2010) A43 Published online: 05 February 2010
16769	Open Access Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope R. de la Fuente Marcos, M. R. Alarcon, J. Licandro, M. Serra-Ricart, J. de León, C. de la Fuente Marcos, G. Lombardi, A. Tejero, A. Cabrera-Lavers, S. Guerra Arencibia and I. Ruiz Cejudo A&A, 700 (2025) L9 Published online: 05 August 2025
15870	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
13295	Free Access The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU J. Helbert, H. Rauer, D. C. Boice and W. F. Huebner A&A, 442 3 (2005) 1107-1120 Published online: 14 October 2005

Astronomy & Astrophysics

Latest highlightsAll

Latest volumeAll

SUBSCRIBE TO OPEN (S2O)

FEATURED IMAGE All

Latest special issuesAll

Broad-band modelling of the GRB 230812B afterglow: Implications for very-high-energy γ-ray detections with IACTs

Exploring the connection between compact object mergers and fast X-ray transients - The cases of LXT 240402A and EP250207b

Environments of high and low excitation radio galaxies

Gravity-selected galaxy clusters: A tight mass-richness relation and an unclear Compton Y-richness trend

A search for cold molecular outflows in cosmic-noon galaxies

J-PAS: A neural network approach to single stellar population characterisation

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - I. Motivation, sample, data reduction, and results overview

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - III. The vertical structure of debris disks

The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU

Near-IR imaging toward a puzzling young stellar object precessing jet

Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope

A long term spectroscopic and photometric study of the old nova HR Delphini

Planck 2018 results - VI. Cosmological parameters

A long term spectroscopic and photometric study of the old nova HR Delphini

The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU

Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope

Planck 2018 results - VI. Cosmological parameters

JWST reveals a supernova following a gamma-ray burst at z ≃ 7.3

A long term spectroscopic and photometric study of the old nova HR Delphini

SDSS-based taxonomic classification and orbital distribution of main belt asteroids

Assessing interstellar comet 3I/ATLAS with the 10.4 m Gran Telescopio Canarias and the Two-meter Twin Telescope

Planck 2018 results - VI. Cosmological parameters

The chemistry of C₂ and C₃ in the coma of Comet C/1995 O1 (Hale-Bopp) at heliocentric distances r_h ≥ 2.9 AU

Volume 705 (January 2026) (in progress)

Volume 704 (December 2025)

Volume 703 (November 2025)

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