Astronomy & Astrophysics (A&A)

The large-scale kinematics of young stars in the Milky Way disc: First results from SDSS-V

Stretch to stretch, dust to dust: Lower-value local H_0 measurements from the two-population modelling of type Ia supernovae

Experimental confirmation of barrierless reactions between HeH^+ and deuterium atoms suggests a lower abundance of the first molecules at very high redshifts

The Crab Nebula at sub-arcsecond resolution with the International LOFAR Telescope

Volume 704 (December 2025)
(in progress)

FEATURED IMAGE All

The 8 lensed quasars used for measuring <em>H</em><sub>0</sub> — The 8 lensed quasars used for measuring H₀ (TDCOSMO Collaboration, 2025, A&A, 704, A63)

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.
More information is available here. To discuss or join the program, please contact us.

S2O FAQs

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

Variability of optical spectral index to support a central sub-parsec binary black hole system in quasar SDSS J001224-102226.51

XueGuang Zhang

A&A, 704 (2025) L9

Published online: 05 December 2025
Open Access

The TeV emission of 3C273: Inverse Compton radiation from shear-accelerated high-energy electrons in the large-scale jet?

Fabrizio Tavecchio

A&A, 704 (2025) L10

Published online: 05 December 2025
Open Access

Newborn jet in the symbiotic system R Aquarii

T. Liimets, D. P. K. Banerjee, M. Santander-García, J. Alcolea, S. B. Howell, U. Munari, B. Deshev, C. E. Woodward, A. Evans, E. Furlan et al. (5 more)

A&A, 704 (2025) L11

Published online: 05 December 2025
Open Access

X-ray linear polarization prediction in black hole binaries and active galactic nuclei and measurements of it by IXPE

Lev Titarchuk, Paolo Soffitta, Elena Seifina, Enrico Costa, Fabio Muleri and Romana Mikusincova

A&A, 704 (2025) A87

Published online: 05 December 2025
Open Access

Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data

F. Iraci, A. Chalumeau, C. Tiburzi, J. P. W. Verbiest, A. Possenti, S. C. Susarla, M. A. Krishnakumar, G. M. Shaifullah, J. Antoniadis, M. Bagchi et al. (39 more)

A&A, 704 (2025) A109

Published online: 05 December 2025
Open Access

Pulsars and escape: The recipe for LHAASO sources?

Pierrick Martin, Inès Mertz, Jean-Maël Kempf, Ruo-Yu Liu, Alexandre Marcowith and Marianne Lemoine-Goumard

A&A, 704 (2025) A120

Published online: 05 December 2025
Open Access

Identifying long radio transients with accompanying X-Ray emission as disk-jet precessing black holes: The case of ASKAP J1832-0911

Antonios Nathanail

A&A, 704 (2025) A123

Published online: 05 December 2025
Open Access

Accounting for the absence of anomalous microwave emission in the M 31 halo

Francesco De Paolis, Faryal Naseem and Noraiz Tahir

A&A, 704 (2025) A128

Published online: 05 December 2025

Most downloaded articles

2384	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
1356	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
1149	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
978	Press Release Open Access The Diamond Ring in Cygnus X: Advanced stage of an expanding bubble of ionised carbon Simon M. Dannhauer, Sebastian Vider, Nicola Schneider, Robert Simon, Fernando Comeron, Eduard Keilmann, Stefanie Walch, Lars Bonne, Slawa Kabanovic, Volker Ossenkopf-Okada et al. (11 more) A&A, 703 (2025) A197 Published online: 17 November 2025
959	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 704 (December 2025) (in progress)
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)
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
Volume 702 (October 2025)
1. ALMA imaging and spectrum of protoplanet PDS70c (Domínguez-Jamett. O., et al., 2025, A&A, 702, A18)
2. Simulation of magnetic instability in red giant cores (Meduri, D. G., et al., 2025, A&A, 702, A44)
3. Deep imaging reveals new faint features of Malin 2 (Junais, et al., 2025, A&A, 702, A136)
4. INTEGRAL 20 yr all-sky map of positron 511 keV line (Yoneda, H., et al., 2025, A&A, 702, A220)
See the table of contents

9302	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
6644	Open Access Temporal evolution of the third interstellar comet 3I/ATLAS: Spin, color, spectra, and dust activity T. Santana-Ros, O. Ivanova, S. Mykhailova, N. Erasmus, K. Kamiński, D. Oszkiewicz, T. Kwiatkowski, M. Husárik, T. S. Ngwane and A. Penttilä A&A, 702 (2025) L3 Published online: 26 September 2025
6585	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
5226	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
3634	Gaia Data Release 3 Press Release Open Access Gaia Data Release 3 - Summary of the content and survey properties Gaia Collaboration, A. Vallenari, A. G. A. Brown, T. Prusti, J. H. J. de Bruijne, F. Arenou, C. Babusiaux, M. Biermann, O. L. Creevey, C. Ducourant et al. (446 more) A&A, 674 (2023) A1 Published online: 16 June 2023

24487	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
16981	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
13810	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
13262	Free Access Photodissociation and photoionisation of atoms and molecules of astrophysical interest A. N. Heays, A. D. Bosman and E. F. van Dishoeck A&A, 602 (2017) A105 Published online: 23 June 2017
12412	Press Release Open Access A remarkable ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a little red dot at z = 3.5 Anna de Graaff, Hans-Walter Rix, Rohan P. Naidu, Ivo Labbé, Bingjie Wang, Joel Leja, Jorryt Matthee, Harley Katz, Jenny E. Greene, Raphael E. Hviding et al. (18 more) A&A, 701 (2025) A168 Published online: 10 September 2025

Astronomy & Astrophysics

Latest highlightsAll

Latest volumeAll

SUBSCRIBE TO OPEN (S2O)

FEATURED IMAGE All

Latest special issuesAll

Variability of optical spectral index to support a central sub-parsec binary black hole system in quasar SDSS J001224-102226.51

The TeV emission of 3C273: Inverse Compton radiation from shear-accelerated high-energy electrons in the large-scale jet?

Newborn jet in the symbiotic system R Aquarii

X-ray linear polarization prediction in black hole binaries and active galactic nuclei and measurements of it by IXPE

Combining the second data release of the European Pulsar Timing Array with low-frequency pulsar data

Pulsars and escape: The recipe for LHAASO sources?

Identifying long radio transients with accompanying X-Ray emission as disk-jet precessing black holes: The case of ASKAP J1832-0911

Accounting for the absence of anomalous microwave emission in the M 31 halo

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

Planck 2018 results - VI. Cosmological parameters

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

The Diamond Ring in Cygnus X: Advanced stage of an expanding bubble of ionised carbon

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

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

Temporal evolution of the third interstellar comet 3I/ATLAS: Spin, color, spectra, and dust activity

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

Gaia Data Release 3 - Summary of the content and survey properties

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

Photodissociation and photoionisation of atoms and molecules of astrophysical interest

A remarkable ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a little red dot at z = 3.5

Volume 704 (December 2025) (in progress)

Volume 703 (November 2025)

Volume 702 (October 2025)

News