Astronomy & Astrophysics (A&A)

[56792]JWST-TST High Contrast: Medium-resolution spectroscopy reveals a carbon-rich circumplanetary disk around the young accreting exoplanet Delorme 1AB b

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

Volume 704 (December 2025)
(in progress)

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JWST traces dust evolution at Horsehead's edge (Elyajouri, M., et al., 2025, A&A, 704, A203)

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

Open Access

Vibrationally excited H₂ muting the He I triplet line at 1.08 μm on warm exo-Neptunes

A. García Muñoz, D. De Fazio, D. J. Wilson and K. France

A&A, 704 (2025) L18

Published online: 18 December 2025
Open Access

Inferring planet occurrence rates from radial velocities

J. P. Faria, J.-B. Delisle and D. Ségransan

A&A, 704 (2025) L19

Published online: 18 December 2025
Open Access

CHEX-MATE: Towards a consistent universal pressure profile and cluster mass reconstruction

M. Muñoz-Echeverría, E. Pointecouteau, G. W. Pratt, J.-F. Macías-Pérez, M. Douspis, L. Salvati, I. Bartalucci, H. Bourdin, N. Clerc, F. De Luca et al. (24 more)

A&A, 704 (2025) A302

Published online: 18 December 2025
Open Access

Constraints on AvERA cosmologies from cosmic chronometers and type Ia supernovae

Adrienn Pataki, Péter Raffai, István Csabai, Gábor Rácz and István Szapudi

A&A, 704 (2025) A310

Published online: 18 December 2025
Open Access

A continuous parameterization of the cosmic web

C. Yamila Yaryura, Mario G. Abadi, Noam I. Libeskind, Stefan Gottlöber, Sofía A. Cora and Gustavo Yepes

A&A, 704 (2025) A333

Published online: 18 December 2025
Open Access

Intra-night optical polarization monitoring of blazars

Aristeidis Polychronakis, Ioannis Liodakis, Anastasia Glykopoulou, Dmitry Blinov, Iván Agudo, Svetlana G. Jorstad, Beatriz Agís-González, Sara Capecchiacci, Alberto Floris, Sebastian Kielhmann et al. (13 more)

A&A, 704 (2025) A311

Published online: 18 December 2025
Open Access

An accurate measure of the size of dark matter haloes using the size of galaxies

Claudio Dalla Vecchia and Ignacio Trujillo

A&A, 704 (2025) A312

Published online: 18 December 2025
Open Access

Active galactic nuclei-heated dust revealed in “little red dots”

I. Delvecchio, E. Daddi, B. Magnelli, D. Elbaz, M. Giavalisco, A. Traina, G. Lanzuisi, H. B. Akins, S. Belli, C. M. Casey et al. (4 more)

A&A, 704 (2025) A313

Published online: 18 December 2025

Most downloaded articles

4435	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
3033	Press Release Open Access Delving into the depths of NGC 3783 with XRISM - III. Birth of an ultrafast outflow during a soft flare Liyi Gu, Keigo Fukumura, Jelle Kaastra, Megan Eckart, Ralf Ballhausen, Ehud Behar, Camille Diez, Matteo Guainazzi, Timothy Kallman, Erin Kara et al. (11 more) A&A, 704 (2025) A146 Published online: 09 December 2025
2845	Open Access A grand-design spiral galaxy 1.5 billion years after the Big Bang with JWST Rashi Jain and Yogesh Wadadekar A&A, 703 (2025) A96 Published online: 10 November 2025
2369	Press Release Open Access TDCOSMO 2025: Cosmological constraints from strong lensing time delays TDCOSMO Collaboration, Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frédéric Courbin, Frédéric Dux, Christopher D. Fassnacht, Joshua A. Frieman, Aymeric Galan, Daniel Gilman et al. (23 more) A&A, 704 (2025) A63 Published online: 05 December 2025
2105	Press Release Open Access Characterization of debris disks observed with SPHERE N. Engler, J. Milli, N. Pawellek, R. Gratton, P. Thébault, C. Lazzoni, J. Olofsson, H. M. Schmid, S. Ulmer-Moll, C. Perrot et al. (25 more) A&A, 704 (2025) A21 Published online: 03 December 2025

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)
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)
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

9657	Free Access A search for prompt γ-ray counterparts to fast radio bursts in the Insight-HXMT data C. Guidorzi, M. Marongiu, R. Martone, L. Nicastro, S. L. Xiong, J. Y. Liao, G. Li, S. N. Zhang, L. Amati, F. Frontera et al. (114 more) A&A, 637 (2020) A69 Published online: 15 May 2020
8539	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
8376	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
7002	Free Access Constraining the transient high-energy activity of FRB 180916.J0158+65 with Insight–HXMT follow-up observations C. Guidorzi, M. Orlandini, F. Frontera, L. Nicastro, S. L. Xiong, J. Y. Liao, G. Li, S. N. Zhang, L. Amati, E. Virgilli et al. (89 more) A&A, 642 (2020) A160 Published online: 15 October 2020
6997	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

24362	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
15027	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
14944	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
12413	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
12217	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

Vibrationally excited H₂ muting the He I triplet line at 1.08 μm on warm exo-Neptunes

Inferring planet occurrence rates from radial velocities

CHEX-MATE: Towards a consistent universal pressure profile and cluster mass reconstruction

Constraints on AvERA cosmologies from cosmic chronometers and type Ia supernovae

A continuous parameterization of the cosmic web

Intra-night optical polarization monitoring of blazars

An accurate measure of the size of dark matter haloes using the size of galaxies

Active galactic nuclei-heated dust revealed in “little red dots”

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

Delving into the depths of NGC 3783 with XRISM - III. Birth of an ultrafast outflow during a soft flare

A grand-design spiral galaxy 1.5 billion years after the Big Bang with JWST

TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Characterization of debris disks observed with SPHERE

A search for prompt γ-ray counterparts to fast radio bursts in the Insight-HXMT data

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

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

Constraining the transient high-energy activity of FRB 180916.J0158+65 with Insight–HXMT follow-up observations

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

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

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

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)

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