The Square Kilometre Array (SKA): publications

Arcminute Microkelvin Imager observations at 15.5 GHz of multiple outbursts of Cygnus X-3 in 2024

ArXiv 2502.20409 (2025)

Authors:

DA Green, L Rhodes, J Bright

Multi-band study of the flaring mode emission in the transitional millisecond pulsar PSR J1023+0038

(2025)

Authors:

MC Baglio, F Coti Zelati, AK Hughes, F Carotenuto, S Campana, D de Martino, SE Motta, A Papitto, N Rea, DM Russell, DF Torres, A Di Marco, F La Monaca, S Covino, S Giarratana, G Illiano, A Miraval Zanon, K Alabarta, P D'Avanzo, MM Messa

On the distance to the black hole X-ray binary Swift J1727.8$-$1613

(2025)

Authors:

Benjamin J Burridge, James CA Miller-Jones, Arash Bahramian, Steve R Prabu, Reagan Streeter, Noel Castro Segura, Jesús M Corral Santana, Christian Knigge, Evangelia Tremou, Francesco Carotenuto, Rob Fender, Payaswini Saikia

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

ArXiv 2502.0373 (2025)

Authors:

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

The Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX) Active Galactic Nuclei Catalog: The Fourth Data Release

The Astrophysical Journal: Supplement Series American Astronomical Society 276:2 (2025) 72

Authors:

Chenxu Liu, Karl Gebhardt, Erin Mentuch Cooper, Dustin Davis, Donald P Schneider, Matt J Jarvis, Daniel J Farrow, Steven L Finkelstein, Óscar A Chávez Ortiz

Abstract:

We present the active galactic nuclei (AGN) catalog from the fourth data release (HDR4) of the Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX). HETDEX is an untargeted spectroscopic survey. HDR4 contains 345,874 Integral Field Unit observations from 2017 January to 2023 August covering an effective area of 62.9 deg2. With no imaging preselection, our spectroscopic confirmed AGN sample includes low-luminosity AGN, narrow-line AGN, and/or red AGN down to g ∼ 25. This catalog has 15,940 AGN across the redshifts of z = 0.1 ∼ 4.6, giving a raw AGN number density of 253.4 deg−2. Among them, 10,499 (66%) have redshifts either confirmed by line pairs or matched to the Sloan Digital Sky Survey Quasar Catalog. For the remaining 5441 AGN, 2083 are single broad-line AGN candidates, while the remaining 3358 are single intermediate broad-line (full width at half-maximum, FWHM ∼1200 km s−1) AGN candidates. A total of 4060 (39%) of the 10,499 redshift-confirmed AGN have emission-line regions 3σ more extended than the image quality, which could be strong outflows blowing into the outskirts of the host galaxies or ionized intergalactic medium.

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