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On the relationship between the cosmic web and the alignment of galaxies and AGN jets

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2025)

Authors:

S Lyla Jung, IH Whittam, MJ Jarvis, CL Hale, MN Tudorache, T Yasin

Abstract:

Abstract The impact of active galactic nuclei (AGN) on the evolution of galaxies explains the steep decrease in the number density of the most massive galaxies in the Universe. However, the fueling of the AGN and the efficiency of this feedback largely depend on their environment. We use data from the Low Frequency Array (LOFAR) Two-metre Sky Survey Data Release 2 (LoTSS DR2), the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys, and the Sloan Digital Sky Survey (SDSS) DR12 to make the first study of the orientations of radio jets and their optical counterpart in relation to the cosmic web environment. We find that close to filaments ($\lesssim 11 \, \rm Mpc$), galaxies tend to have their optical major axes aligned with the nearest filaments. On the other hand, radio jets, which are generally aligned perpendicularly to the optical major axis of the host galaxy, show more randomised orientations with respect to host galaxies within $\lesssim 8 \, \rm Mpc$ of filaments. These results support the scenario that massive galaxies in cosmic filaments grow by numerous mergers directed along the orientation of the filaments while experiencing chaotic accretion of gas onto the central black hole. The AGN-driven jets consequently have a strong impact preferentially along the minor axes of dark matter halos within filaments. We discuss the implications of these results for large-scale radio jet alignments, intrinsic alignments between galaxies, and the azimuthal anisotropy of the distribution of circumgalactic medium and anisotropic quenching.
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Uniting the Observed Dynamical Dark Energy Preference with the Discrepancies in Ωm and H0 across Cosmological Probes

The Astrophysical Journal Letters American Astronomical Society 983:1 (2025) l27

Authors:

Xianzhe TZ Tang, Dillon Brout, Tanvi Karwal, Chihway Chang, Vivian Miranda, Maria Vincenzi
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E-INSPIRE - I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at z < 0.3

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) (2025) staf516

Authors:

John Mills, Chiara Spiniello, Alexey Sergeyev, Crescenzo Tortora, Vladyslav Khramtsov, Giuseppe D’Ago, Michalina Maksymowicz-Maciata, João PV Benedetti, Anna Ferré-Mateu, Michele Cappellari, Roger Davies, Johanna Hartke, Charles Rosen
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Sub-second optical/near-infrared quasi-periodic oscillations from the black hole X-ray transient Swift J1727.8-1613

(2025)

Authors:

FM Vincentelli, T Shahbaz, P Casella, VS Dhillon, J Paice, D Altamirano, N Castro Segura, R Fender, P Gandhi, S Littlefair, T Maccarone, J Malzac, K O'Brien, DM Russell, AJ Tetarenko, P Uttley, A Veledina
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The resolved star-formation efficiency of early-type galaxies

(2025)

Authors:

Thomas G Williams, Francesco Belfiore, Martin Bureau, Ashley T Barnes, Frank Bigiel, Woorak Choi, Ryan Chown, Dario Colombo, Daniel A Dale, Timothy A Davis, Jacob Elford, Jindra Gensior, Simon CO Glover, Brent Groves, Ralf S Klessen, Fu-Heng Liang, Hsi-An Pan, Ilaria Ruffa, Toshiki Saito, Patricia Sánchez-Blázquez, Marc Sarzi, Eva Schinnerer
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