Redshift Evolution of the Feedback–Cooling Equilibrium in the Core of 48 SPT Galaxy Clusters: A Joint Chandra–SPT–ATCA Analysis (2023)
Journal Article
Ruppin, F., McDonald, M., Hlavacek-Larrondo, J., Bayliss, M., Bleem, L., Calzadilla, M., …Tothill, N. (2023). Redshift Evolution of the Feedback–Cooling Equilibrium in the Core of 48 SPT Galaxy Clusters: A Joint Chandra–SPT–ATCA Analysis. Astrophysical Journal, 948(1), Article 49. https://doi.org/10.3847/1538-4357/acc38d

We analyze the cooling and feedback properties of 48 galaxy clusters at redshifts 0.4 < z < 1.3 selected from the South Pole Telescope (SPT) catalogs to evolve like the progenitors of massive and well-studied systems at z ∼ 0. We estimate the radio p... Read More about Redshift Evolution of the Feedback–Cooling Equilibrium in the Core of 48 SPT Galaxy Clusters: A Joint Chandra–SPT–ATCA Analysis.

RXJ0437+00: constraining dark matter with exotic gravitational lenses (2023)
Journal Article
Lagattuta, D. J., Richard, J., Ebeling, H., Basto, Q., Cerny, C., Edge, A., …Massey, R. (2023). RXJ0437+00: constraining dark matter with exotic gravitational lenses. Monthly Notices of the Royal Astronomical Society, 522(1), 1091-1107. https://doi.org/10.1093/mnras/stad803

We present the first strong-gravitational-lensing analysis of the galaxy cluster RX J0437.1+0043 (RXJ0437; z = 0.285). Newly obtained, deep MUSE observations, Keck/MOSFIRE near-infrared spectroscopy, and Hubble Space Telescope SNAPshot imaging reveal... Read More about RXJ0437+00: constraining dark matter with exotic gravitational lenses.

Abell 1201: detection of an ultramassive black hole in a strong gravitational lens (2023)
Journal Article
Nightingale, J., Smith, R. J., He, Q., O’Riordan, C. M., Kegerreis, J. A., Amvrosiadis, A., …Massey, R. J. (2023). Abell 1201: detection of an ultramassive black hole in a strong gravitational lens. Monthly Notices of the Royal Astronomical Society, 521(3), 3298-3322. https://doi.org/10.1093/mnras/stad587

Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution, leading to an observed correlation between SMBH mass MBH and host galaxy velocity dispersion σe. Outside the local Universe, measurements of MBH are usually only p... Read More about Abell 1201: detection of an ultramassive black hole in a strong gravitational lens.

The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra (2023)
Journal Article
Alexander, D. M., Davis, T. M., Chaussidon, E., Fawcett, V., X. Gonzalez-Morales, A., Lan, T., …Zou, S. (2023). The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra. Astronomical Journal, 165(3), Article 124. https://doi.org/10.3847/1538-3881/acacfc

A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key survey metrics. In this paper we present results from VI of the quasar su... Read More about The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra.

Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448 (2023)
Journal Article
Masterson, M., McDonald, M., Ansarinejad, B., Bayliss, M., Benson, B. A., Bleem, L. E., …Somboonpanyakul, T. (2023). Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448. Astrophysical Journal, 944(2), Article 164. https://doi.org/10.3847/1538-4357/acae9e

We present a multiwavelength analysis of the galaxy cluster SPT-CL J0607-4448 (SPT0607), which is one of the most distant clusters discovered by the South Pole Telescope at z = 1.4010 ± 0.0028. The high-redshift cluster shows clear signs of being rel... Read More about Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448.

Atmospheric Pressure and Molecular Cloud Formation in Early-type Galaxies (2023)
Journal Article
Babyk, I. V., McNamara, B., Nulsen, P., Russell, H., Edge, A., & Blitz, L. (2023). Atmospheric Pressure and Molecular Cloud Formation in Early-type Galaxies. Astrophysical Journal, 944(1), Article 69. https://doi.org/10.3847/1538-4357/acb53f

A strong correlation between atmospheric pressure and molecular gas mass is found in central cluster galaxies and early-type galaxies. This trend and a similar trend with atmospheric gas density would naturally arise if the molecular clouds condensed... Read More about Atmospheric Pressure and Molecular Cloud Formation in Early-type Galaxies.

The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission-line Galaxies (2023)
Journal Article
Lan, T., Tojeiro, R., Armengaud, E., Prochaska, J. X., Davis, T., Alexander, D. M., …Zhou, Z. (2023). The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission-line Galaxies. Astrophysical Journal, 943(1), Article 68. https://doi.org/10.3847/1538-4357/aca5fa

The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements of galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect DESI spectra of approximately... Read More about The DESI Survey Validation: Results from Visual Inspection of Bright Galaxies, Luminous Red Galaxies, and Emission-line Galaxies.

Does absorption against AGN reveal supermassive black hole accretion? (2022)
Journal Article
Rose, T., McNamara, B., Combes, F., Edge, A., Fabian, A., Gaspari, M., …Ferland, G. (2023). Does absorption against AGN reveal supermassive black hole accretion?. Monthly Notices of the Royal Astronomical Society, 518(1), 878 - 892. https://doi.org/10.1093/mnras/stac3194

Galaxies often contain large reservoirs of molecular gas that shape their evolution. This can be through cooling of the gas – which leads to star formation, or accretion on to the central supermassive black hole – which fuels active galactic nucleus... Read More about Does absorption against AGN reveal supermassive black hole accretion?.

Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback (2022)
Journal Article
Tamhane, P. D., McNamara, B. R., Russell, H. R., Edge, A. C., Fabian, A. C., Nulsen, P. E., & Babyk, I. V. (2022). Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback. Monthly Notices of the Royal Astronomical Society, 516(1), https://doi.org/10.1093/mnras/stac2168

Molecular gas flows are analysed in 14 cluster galaxies (BCGs) centred in cooling hot atmospheres. The BCGs contain 109−1011 M⊙ of molecular gas, much of which is being moved by radio jets and lobes. The molecular flows and radio jet powers are compa... Read More about Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback.

Circumnuclear Medium around the Central AGN in a Cool-core Cluster, Abell 1644-South (2022)
Journal Article
Baek, J., Chung, A., Edge, A., Rose, T., Kim, J., & Jung, T. (2022). Circumnuclear Medium around the Central AGN in a Cool-core Cluster, Abell 1644-South. Astrophysical Journal, 932(1), Article 64. https://doi.org/10.3847/1538-4357/ac6de6

We present the circumnuclear multiphase gas properties of the brightest cluster galaxy (BCG) in the center of Abell 1644-South (A1644-S). A1644-S is the main cluster in a merging system, which is well known for X-ray hot gas sloshing in its core. The... Read More about Circumnuclear Medium around the Central AGN in a Cool-core Cluster, Abell 1644-South.

Pilot-WINGS: An extended MUSE view of the structure of Abell 370 (2022)
Journal Article
Lagattuta, D. J., Richard, J., Bauer, F. E., Cerny, C., Claeyssens, A., Guaita, L., …Weaver, J. R. (2022). Pilot-WINGS: An extended MUSE view of the structure of Abell 370. Monthly Notices of the Royal Astronomical Society, 514(1), 497-517. https://doi.org/10.1093/mnras/stac418

We investigate the strong-lensing cluster Abell 370 (A370) using a wide Integral Field Unit (IFU) spectroscopic mosaic from the Multi-Unit Spectroscopic Explorer (MUSE). IFU spectroscopy provides significant insight into the structure and mass conten... Read More about Pilot-WINGS: An extended MUSE view of the structure of Abell 370.

The First Large Absorption Survey in H i (FLASH): I. Science goals and survey design (2022)
Journal Article
Allison, J. R., Sadler, E., Amaral, A., An, T., Curran, S., Darling, J., …Zwaan, M. (2022). The First Large Absorption Survey in H i (FLASH): I. Science goals and survey design. Publications of the Astronomical Society of Australia, 39, https://doi.org/10.1017/pasa.2022.3

A LOFAR view into the stormy environment of the galaxy cluster 2A0335+096 (2022)
Journal Article
Ignesti, A., Brunetti, G., Shimwell, T., Gitti, M., Birzan, L., Botteon, A., …van Weeren, R. (2022). A LOFAR view into the stormy environment of the galaxy cluster 2A0335+096. Astronomy & Astrophysics, 659, Article A20. https://doi.org/10.1051/0004-6361/202142549

Context. Radio observations represent a powerful probe of the physics occurring in the intracluster medium (ICM) because they trace the relativistic cosmic rays in the cluster magnetic fields, or within galaxies themselves. By probing the low-energy... Read More about A LOFAR view into the stormy environment of the galaxy cluster 2A0335+096.

Quasar feedback survey: multiphase outflows, turbulence, and evidence for feedback caused by low power radio jets inclined into the galaxy disc (2022)
Journal Article
Girdhar, A., Harrison, C., Mainieri, V., Bittner, A., Costa, T., Kharb, P., …Ward, S. (2022). Quasar feedback survey: multiphase outflows, turbulence, and evidence for feedback caused by low power radio jets inclined into the galaxy disc. Monthly Notices of the Royal Astronomical Society, 512(2), 1608-1628. https://doi.org/10.1093/mnras/stac073

We present a study of a luminous, z = 0.15, type-2 quasar (L[OIII] = 1042.8 erg s−1) from the Quasar Feedback Survey. It is classified as ‘radio-quiet’ (L1.4 GHz = 1023.8 W Hz−1); however, radio imaging reveals ∼ 1 kpc low-power radio jets (Pjet = 10... Read More about Quasar feedback survey: multiphase outflows, turbulence, and evidence for feedback caused by low power radio jets inclined into the galaxy disc.

The variability of brightest cluster galaxies at high radio frequencies (2021)
Journal Article
Rose, T., Edge, A., Kiehlmann, S., Baek, J., Chung, A., Jung, T., …Sedgewick, A. (2022). The variability of brightest cluster galaxies at high radio frequencies. Monthly Notices of the Royal Astronomical Society, 509(2), 2869-2884. https://doi.org/10.1093/mnras/stab3217

Variability of a galaxy’s core radio source can be a significant consequence of active galactic nucleus accretion. However, this variability has not been well studied, particularly at high radio frequencies. As such, we report on a campaign monitorin... Read More about The variability of brightest cluster galaxies at high radio frequencies.

The ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz (2021)
Journal Article
Biava, N., de Gasperin, F., Bonafede, A., Edler, H., Giacintucci, S., Mazzotta, P., …van Weeren, R. (2021). The ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz. Monthly Notices of the Royal Astronomical Society, 508(3), 3995-4007. https://doi.org/10.1093/mnras/stab2840

Diffuse radio emission at the centre of galaxy clusters has been observed both in merging clusters on scales of Mpc, called giant radio haloes, and in relaxed systems with a cool-core on smaller scales, named mini haloes. Giant radio haloes and mini... Read More about The ultra-steep diffuse radio emission observed in the cool-core cluster RX J1720.1+2638 with LOFAR at 54 MHz.

An extreme case of galaxy and cluster co-evolution at z  = 0.7 (2021)
Journal Article
Ebeling, H., Richard, J., Smail, I., Edge, A., Koekemoer, A., & Zalesky, L. (2021). An extreme case of galaxy and cluster co-evolution at z  = 0.7. Monthly Notices of the Royal Astronomical Society, 508(3), 3663-3671. https://doi.org/10.1093/mnras/stab2725

We report the discovery of eMACS J0252.4−2100 (eMACS J0252), a massive and highly evolved galaxy cluster at z = 0.703. Our analysis of Hubble Space Telescope imaging and VLT/MUSE and Keck/DEIMOS spectroscopy of the system finds a high-velocity disper... Read More about An extreme case of galaxy and cluster co-evolution at z  = 0.7.

Excitation mechanisms in the intracluster filaments surrounding brightest cluster galaxies (2021)
Journal Article
Polles, F., Salomé, P., Guillard, P., Godard, B., Pineau des Forêts, G., Olivares, V., …Lehnert, M. (2021). Excitation mechanisms in the intracluster filaments surrounding brightest cluster galaxies. Astronomy & Astrophysics, 651, Article A13. https://doi.org/10.1051/0004-6361/202039730

Context. The excitation of the filamentary gas structures surrounding giant elliptical galaxies at the center of cool-core clusters, also known as brightest cluster galaxies (BCGs), is key to our understanding of active galactic nucleus (AGN) feedbac... Read More about Excitation mechanisms in the intracluster filaments surrounding brightest cluster galaxies.

Constraining the AGN duty cycle in the cool-core cluster MS 0735.6+7421 with LOFAR data (2021)
Journal Article
Biava, N., Brienza, M., Bonafede, A., Gitti, M., Bonnassieux, E., Harwood, J., …Vantyghem, A. (2021). Constraining the AGN duty cycle in the cool-core cluster MS 0735.6+7421 with LOFAR data. Astronomy & Astrophysics, 650, Article A170. https://doi.org/10.1051/0004-6361/202040063

Context. MS 0735.6+7421 is a galaxy cluster that hosts a central radio galaxy with a very steep spectrum. The spectrum is produced by one of the most powerful known jetted active galactic nuclei (AGN). The radio plasma, ejected at nearly light speed... Read More about Constraining the AGN duty cycle in the cool-core cluster MS 0735.6+7421 with LOFAR data.

A Massive, Clumpy Molecular Gas Distribution and Displaced AGN in Zw 3146 (2021)
Journal Article
Vantyghem, A., McNamara, B., O’Dea, C., Baum, S., Combes, F., Edge, A., …Salomé, P. (2021). A Massive, Clumpy Molecular Gas Distribution and Displaced AGN in Zw 3146. Astrophysical Journal, 910(1), Article 53. https://doi.org/10.3847/1538-4357/abe306

We present a recent Atacama Large Millimeter/submillimeter Array observation of the CO(1−0) line emission in the central galaxy of the Zw 3146 galaxy cluster (z = 0.2906). We also present updated X-ray cavity measurements from archival Chandra observ... Read More about A Massive, Clumpy Molecular Gas Distribution and Displaced AGN in Zw 3146.