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Ubiquitous radio emission in quasars: Predominant AGN origin and a connection to jets, dust, and winds (2024)
Journal Article
Calistro Rivera, G., Alexander, D. M., Harrison, C. M., Fawcett, V. A., Best, P. N., Williams, W. L., Hardcastle, M. J., Rosario, D. J., Smith, D. J. B., Arnaudova, M. I., Escott, E., Gürkan, G., Kondapally, R., Miley, G., Morabito, L. K., Petley, J., Prandoni, I., Röttgering, H. J. A., & Yue, B.-H. (2024). Ubiquitous radio emission in quasars: Predominant AGN origin and a connection to jets, dust, and winds. Astronomy & Astrophysics, 691, Article A191. https://doi.org/10.1051/0004-6361/202348982

We present a comprehensive study of the physical origin of radio emission in optical quasars at redshifts z < 2.5. We focus particularly on the associations between compact radio emission, dust reddening, and outflows identified in our earlier work....

KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon (2024)
Journal Article
Bertola, E., Circosta, C., Ginolfi, M., Mainieri, V., Vignali, C., Calistro Rivera, G., Ward, S. R., Lopez, I. E., Pensabene, A., Alexander, D. M., Bischetti, M., Brusa, M., Cappi, M., Comastri, A., Contursi, A., Cicone, C., Cresci, G., Dadina, M., D’Amato, Q., Feltre, A., …Zappacosta, L. (2024). KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon. Astronomy & Astrophysics, 691, Article A178. https://doi.org/10.1051/0004-6361/202450420

The energy released by active galactic nuclei (AGN) has the potential to heat or remove the gas of the ISM, thus likely impacting the cold molecular gas reservoir of host galaxies at first, with star formation following as a consequence on longer tim... Read More about KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon.

The VST ATLAS Quasar Survey – II. Halo mass profiles of galaxies, LRGs and galaxy clusters via quasar and CMB lensing (2024)
Journal Article
Eltvedt, A. M., Shanks, T., Metcalfe, N., Ansarinejad, B., Barrientos, L. F., Murphy, D. N. A., & Alexander, D. M. (2024). The VST ATLAS Quasar Survey – II. Halo mass profiles of galaxies, LRGs and galaxy clusters via quasar and CMB lensing. Monthly Notices of the Royal Astronomical Society, 535(3), 2092-2104. https://doi.org/10.1093/mnras/stae2466

We cross-correlate a low-contamination subset of the VST ATLAS g < 22.5 quasar catalogue with g < 21.5 galaxy clusters, r < 21 galaxies and r < 19.5 luminous red galaxies (LRGs) to probe their halo mass profiles via quasar magnification bias caused b... Read More about The VST ATLAS Quasar Survey – II. Halo mass profiles of galaxies, LRGs and galaxy clusters via quasar and CMB lensing.

Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups (2024)
Journal Article
Petter, G. C., Hickox, R. C., Morabito, L. K., & Alexander, D. M. (2024). Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups. The Astrophysical Journal, 972(2), Article 184. https://doi.org/10.3847/1538-4357/ad6849

Coupling between relativistic jets launched by accreting supermassive black holes and the surrounding gaseous media is a vital ingredient in galaxy evolution models. To constrain the environments in which this feedback takes place over cosmic time, w... Read More about Environments of Luminous Low-frequency Radio Galaxies Since Cosmic Noon: Jet-mode Feedback Dominates in Groups.

The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population (2024)
Journal Article
Klindt, L., Lansbury, G. B., Rosario, D. J., Alexander, D. M., Aird, J., Stern, D., Forster, K., Koss, M. J., Greenwell, C. L., Bauer, F. E., Ricci, C., Tomsick, J., Brandt, W. N., Connor, T., Boorman, P. G., Annuar, A., Ballantyne, D. R., Chen, C.-T., Civano, F., Comastri, A., …van Soelen, B. (2024). The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population. Astrophysical Journal Supplement, 273(2), Article 20. https://doi.org/10.3847/1538-4365/ad4a71

We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR). The NuSTAR serendipitous survey 80 month (NSS80) catalog has an unprecedented ∼62 Ms of ef... Read More about The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population.

Accretion properties of X-ray AGN: evidence for radiation-regulated obscuration with redshift-dependent host galaxy contribution (2024)
Journal Article
Laloux, B., Georgakakis, A., Alexander, D. M., Buchner, J., Andonie, C., Acharya, N., Aird, J., Alonso-Tetilla, A. V., Bongiorno, A., Hickox, R. C., Lapi, A., Musiimenta, B., Almeida, C. R., Villforth, C., & Shankar, F. (2024). Accretion properties of X-ray AGN: evidence for radiation-regulated obscuration with redshift-dependent host galaxy contribution. Monthly Notices of the Royal Astronomical Society, 532(3), 3459-3479. https://doi.org/10.1093/mnras/stae1649

Broad absorption line quasars in the Dark Energy Spectroscopic Instrument Early Data Release (2024)
Journal Article
Filbert, S., Martini, P., Seebaluck, K., Ennesser, L., Alexander, D. M., Bault, A., Brodzeller, A., Herrera-Alcantar, H. K., Montero-Camacho, P., Pérez-Ràfols, I., Ramírez-Pérez, C., Ravoux, C., Tan, T., Aguilar, J., Ahlen, S., Bailey, S., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., …Zhou, Z. (2024). Broad absorption line quasars in the Dark Energy Spectroscopic Instrument Early Data Release. Monthly Notices of the Royal Astronomical Society, 532(4), 3669-3681. https://doi.org/10.1093/mnras/stae1610

Ionised AGN outflows in the Goldfish galaxy: The illuminating and interacting red quasar eFEDSJ091157.4+014327 at z ∼ 0.6 (2024)
Journal Article
Musiimenta, B., Speranza, G., Urrutia, T., Brusa, M., Ramos Almeida, C., Perna, M., López, I. E., Alexander, D., Laloux, B., Shankar, F., Lapi, A., Salvato, M., Toba, Y., Andonie, C., & Rodríguez, I. M. (2024). Ionised AGN outflows in the Goldfish galaxy: The illuminating and interacting red quasar eFEDSJ091157.4+014327 at z ∼ 0.6. Astronomy & Astrophysics, 687, Article A111. https://doi.org/10.1051/0004-6361/202449283

Context. Evolutionary models suggest that the initial growth phases of active galactic nuclei (AGN) and their central supermassive black holes (SMBHs) are dust-enshrouded and characterised by jet or wind outflows that should gradually clear the inter... Read More about Ionised AGN outflows in the Goldfish galaxy: The illuminating and interacting red quasar eFEDSJ091157.4+014327 at z ∼ 0.6.

The High-Energy X-ray Probe (HEX-P): the circum-nuclear environment of growing supermassive black holes (2024)
Journal Article
Boorman, P. G., Torres-Albà, N., Annuar, A., Marchesi, S., Pfeifle, R. W., Stern, D., …The HEX-P Collaboration. (2024). The High-Energy X-ray Probe (HEX-P): the circum-nuclear environment of growing supermassive black holes. Frontiers in Astronomy and Space Sciences, 11, Article 1335459. https://doi.org/10.3389/fspas.2024.1335459

Ever since the discovery of the first active galactic nuclei (AGN), substantial observational and theoretical effort has been invested into understanding how massive black holes have evolved across cosmic time. Circum-nuclear obscuration is now estab... Read More about The High-Energy X-ray Probe (HEX-P): the circum-nuclear environment of growing supermassive black holes.