Astronomy & Astrophysics (A&A)

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Millimeter-selected clusters and dusty galaxies (Archipley, M., et al., 2026, A&A, 706, A17)

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

Discovery of 1H-cyclopent[cd]indene (c-C₁₁H₈) in TMC-1 with the QUIJOTE line survey: A new three-ringed polycyclic aromatic hydrocarbon

R. Fuentetaja, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, P. de Vicente and J. Cernicharo

A&A, 706 (2026) L10

Published online: 06 February 2026
Open Access

Afterglow linear polarization signatures from steep GRB jets: Implications for orphan afterglows

G. Birenbaum, J. Granot and P. Beniamini

A&A, 706 (2026) A145

Published online: 06 February 2026
Open Access

The core-shift of Sagittarius A* as a discriminant between disk and jet emission models with millimeter very long baseline interferometry

R. Fraga-Encinas, M. Mościbrodzka and H. Falcke

A&A, 706 (2026) A151

Published online: 06 February 2026
Open Access

Main and inter-pulse interaction in PSRs J1842+0358 and J1926+0737: evidence of inter-pole communication

X. Song, P. Weltevrede, J. van Leeuwen, G. Wright and M. Keith

A&A, 706 (2026) A160

Published online: 06 February 2026
Open Access

Intrinsic alignments of galaxies in multiple projections

M. L. van Heukelum, D. Neumann, M. García Escobar, N. E. Chisari and H. Hoekstra

A&A, 706 (2026) A148

Published online: 06 February 2026
Open Access

Star-forming galaxies in the cosmic web in the last 11 Gyr

Baptiste Jego, Katarina Kraljic, Matthieu Béthermin and Romeel Davé

A&A, 706 (2026) A150

Published online: 06 February 2026
Open Access

Statistics of supermassive black hole gravitational wave background anisotropy

Juhan Raidal, Juan Urrutia, Ville Vaskonen and Hardi Veermäe

A&A, 706 (2026) A159

Published online: 06 February 2026
Open Access

Searching for strong lensing by late-type galaxies in UNIONS

J. A. Acevedo Barroso, B. Clément, F. Courbin, R. Gavazzi, C. Lemon, K. Rojas, D. Scott, S. Gwyn, F. Hammer, M. J. Hudson and E. A. Magnier

A&A, 706 (2026) A146

Published online: 06 February 2026

Most downloaded articles

4865	Open Access Identifying astrophysical anomalies in 99.6 million source cutouts from the Hubble legacy archive using AnomalyMatch David O’Ryan and Pablo Gómez A&A, 704 (2025) A227 Published online: 16 December 2025
3663	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
1557	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
1350	Free Access Spectroscopic observations of Hα emission-line stars from Sanduleak & Stephenson's 1973 (SS73) list C. B. Pereira, C. S. Franco and F. X. de Araújo A&A, 397 3 (2003) 927-942 Published online: 21 January 2003
1227	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

Volume 706 (February 2026) (in progress)
1. Millimeter-selected clusters and dusty galaxies (Archipley, M., et al., 2026, A&A, 706, A17)
See the table of contents
Volume 705 (January 2026)
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

14110	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
7402	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
6705	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
5356	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
5076	Open Access Identifying astrophysical anomalies in 99.6 million source cutouts from the Hubble legacy archive using AnomalyMatch David O’Ryan and Pablo Gómez A&A, 704 (2025) A227 Published online: 16 December 2025

24281	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
20233	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
18364	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
15786	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
15698	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

Astronomy & Astrophysics

Latest highlightsAll

Latest volumeAll

SUBSCRIBE TO OPEN (S2O)

FEATURED IMAGE All

Latest special issuesAll

Discovery of 1H-cyclopent[cd]indene (c-C₁₁H₈) in TMC-1 with the QUIJOTE line survey: A new three-ringed polycyclic aromatic hydrocarbon

Afterglow linear polarization signatures from steep GRB jets: Implications for orphan afterglows

The core-shift of Sagittarius A* as a discriminant between disk and jet emission models with millimeter very long baseline interferometry

Main and inter-pulse interaction in PSRs J1842+0358 and J1926+0737: evidence of inter-pole communication

Intrinsic alignments of galaxies in multiple projections

Star-forming galaxies in the cosmic web in the last 11 Gyr

Statistics of supermassive black hole gravitational wave background anisotropy

Searching for strong lensing by late-type galaxies in UNIONS

Identifying astrophysical anomalies in 99.6 million source cutouts from the Hubble legacy archive using AnomalyMatch

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

Spectroscopic observations of Hα emission-line stars from Sanduleak & Stephenson's 1973 (SS73) list

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

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

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

Identifying astrophysical anomalies in 99.6 million source cutouts from the Hubble legacy archive using AnomalyMatch

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

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

Planck 2018 results - VI. Cosmological parameters

Volume 706 (February 2026) (in progress)

Volume 705 (January 2026)

Volume 704 (December 2025)

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