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From outskirts to core: the suppression and activation of radio AGN around galaxy clusters (2024)
Journal Article
de Vos, K., Hatch, N. A., & Merrifield, M. R. (2024). From outskirts to core: the suppression and activation of radio AGN around galaxy clusters. Monthly Notices of the Royal Astronomical Society, 535(1), 217–222. https://doi.org/10.1093/mnras/stae2391

To investigate how the radio-identified active galactic nuclei (AGN) fraction varies with cluster-centric radius, we present the projected and de-projected distributions of a large sample of LOFAR-identified radio AGN out to 30𝑅500 around galaxy clus... Read More about From outskirts to core: the suppression and activation of radio AGN around galaxy clusters.

Assembly of the Intracluster Light in the Horizon-AGN Simulation (2024)
Journal Article
Brown, H. J., Martin, G., Pearce, F. R., Hatch, N. A., Bahé, Y. M., & Dubois, Y. (2024). Assembly of the Intracluster Light in the Horizon-AGN Simulation. Monthly Notices of the Royal Astronomical Society, 534(1), 431-443. https://doi.org/10.1093/mnras/stae2084

The diffuse stellar component of galaxy clusters made up of intergalactic stars is termed the intracluster light (ICL). Though there is a developing understanding of the mechanisms by which the ICL is formed, no strong consensus has yet been reached... Read More about Assembly of the Intracluster Light in the Horizon-AGN Simulation.

Local versus global environment: the suppression of star formation in the vicinity of galaxy clusters (2024)
Journal Article
De Vos, K., Merrifield, M. R., & Hatch, N. A. (2024). Local versus global environment: the suppression of star formation in the vicinity of galaxy clusters. Monthly Notices of the Royal Astronomical Society, 531(4), 4383–4390. https://doi.org/10.1093/mnras/stae1403

In order to examine where, how and why the quenching of star formation begins in the outskirts of galaxy clusters, we investigate the de-projected radial distribution of a large sample of quenched and star-forming galaxies (SFGs) out to 30R500 around... Read More about Local versus global environment: the suppression of star formation in the vicinity of galaxy clusters.

Local versus global environment: The suppression of star formation in the vicinity of galaxy clusters (2024)
Journal Article
de Vos, K., Merrifield, M. R., & Hatch, N. A. (2024). Local versus global environment: The suppression of star formation in the vicinity of galaxy clusters. Monthly Notices of the Royal Astronomical Society, 531(4), 4383–4390. https://doi.org/10.1093/mnras/stae1403

In order to examine where, how and why the quenching of star formation begins in the outskirts of galaxy clusters, we investigate the de-projected radial distribution of a large sample of quenched and star-forming galaxies (SFGs) out to 30R500 around... Read More about Local versus global environment: The suppression of star formation in the vicinity of galaxy clusters.

New insights into the role of AGNs in forming the cluster red sequence (2024)
Journal Article
Shimakawa, R., Pérez-Martínez, J. M., Koyama, Y., Tanaka, M., Tanaka, I., Kodama, T., …Kurk, J. D. (2024). New insights into the role of AGNs in forming the cluster red sequence. Monthly Notices of the Royal Astronomical Society, 528(2), 3679–3695. https://doi.org/10.1093/mnras/stae118

As a considerable investment of time from various telescope facilities was dedicated toward studying the Spiderweb protocluster at z = 2.2, it so far remains one of the most extensively studied protocluster. We report here the latest results in this... Read More about New insights into the role of AGNs in forming the cluster red sequence.

Spitzer-selected z > 1.3 protocluster candidates in the LSST deep-drilling fields (2023)
Journal Article
Gully, H., Hatch, N., Bahé, Y., Balogh, M., Bolzonella, M., Cooper, M. C., Muzzin, A., Pozzetti, L., Rudnick, G., Vulcani, B., & Wilson, G. (2023). Spitzer-selected z > 1.3 protocluster candidates in the LSST deep-drilling fields. Monthly Notices of the Royal Astronomical Society, 527(4), 10680-10696. https://doi.org/10.1093/mnras/stad3885

We have identified 189 candidate z > 1.3 protoclusters and clusters in the LSST Deep Drilling Fields. This sample will enable the measurement of the metal enrichment and star formation history of clusters during their early assembly period through th... Read More about Spitzer-selected z > 1.3 protocluster candidates in the LSST deep-drilling fields.

The stellar mass function of quiescent galaxies in 2 < z < 2.5 protoclusters (2023)
Journal Article
Edward, A. H., Balogh, M. L., Bahé, Y. M., Cooper, M. C., Hatch, N. A., Marchioni, J., Muzzin, A., Noble, A., Rudnick, G. H., Vulcani, B., Wilson, G., De Lucia, G., Demarco, R., Forrest, B., Hirschmann, M., Castignani, G., Cerulo, P., Finn, R. A., Hewitt, G., Jablonka, P., …Xie, L. (2024). The stellar mass function of quiescent galaxies in 2 < z < 2.5 protoclusters. Monthly Notices of the Royal Astronomical Society, 527(3), 8598–8617. https://doi.org/10.1093/mnras/stad3751

We present an analysis of the galaxy stellar mass function (SMF) of 14 known protoclusters between 2.0 < z < 2.5 in the COSMOS field, down to a mass limit of 10 9.5 M⊙. We use existing photometric redshifts with a statistical background subtraction,... Read More about The stellar mass function of quiescent galaxies in 2 < z < 2.5 protoclusters.

COALAS II. Extended molecular gas reservoirs are common in a distant, forming galaxy cluster (2023)
Journal Article
Chen, Z., Dannerbauer, H., Lehnert, M., Emonts, B. H. C., Gu, Q., Allison, J. R., …Ziegler, B. (2024). COALAS II. Extended molecular gas reservoirs are common in a distant, forming galaxy cluster. Monthly Notices of the Royal Astronomical Society, 527(3), 8950–8972. https://doi.org/10.1093/mnras/stad3128

This paper presents the results of 475 hours of interferometric observations with the Australia Telescope Compact Array towards the Spiderweb protocluster at (z=2.16). We search for large, extended molecular gas reservoirs among 46 previously detecte... Read More about COALAS II. Extended molecular gas reservoirs are common in a distant, forming galaxy cluster.

Intracluster light in the core of z ∼ 2 galaxy proto-clusters (2023)
Journal Article
Werner, S. V., Hatch, N. A., Matharu, J., Gonzalez, A. H., Bahé, Y. M., Mei, S., …Wylezalek, D. (2023). Intracluster light in the core of z ∼ 2 galaxy proto-clusters. Monthly Notices of the Royal Astronomical Society, 523(1), 91-104. https://doi.org/10.1093/mnras/stad1410

Intracluster light is thought to originate from stars that were ripped away from their parent galaxies by gravitational tides and galaxy interactions during the build up of the cluster. The stars from such interactions will accumulate over time, so s... Read More about Intracluster light in the core of z ∼ 2 galaxy proto-clusters.

A cosmic stream of atomic carbon gas connected to a massive radio galaxy at redshift 3.8 (2023)
Journal Article
Emonts, B. H., Lehnert, M. D., Yoon, I., Mandelker, N., Villar-Martín, M., Miley, G. K., …Guillard, P. (2023). A cosmic stream of atomic carbon gas connected to a massive radio galaxy at redshift 3.8. Science, 379(6639), 1323-1326. https://doi.org/10.1126/science.abh2150

The growth of galaxies in the early Universe is driven by accretion of circum- and intergalactic gas. Simulations have predicted that steady streams of cold gas penetrate the dark matter halos of galaxies and provide the raw material necessary to sus... Read More about A cosmic stream of atomic carbon gas connected to a massive radio galaxy at redshift 3.8.

Signs of environmental effects on star-forming galaxies in the Spiderweb protocluster at z = 2.16 (2022)
Journal Article
Pérez-Martínez, J. M., Dannerbauer, H., Kodama, T., Koyama, Y., Shimakawa, R., Suzuki, T. L., …Tanaka, I. (2023). Signs of environmental effects on star-forming galaxies in the Spiderweb protocluster at z = 2.16. Monthly Notices of the Royal Astronomical Society, 518(2), 1707-1734. https://doi.org/10.1093/mnras/stac2784

We use multi-object near-infrared spectroscopy with VLT/KMOS to investigate the role of the environment in the evolution of the ionized gas properties of narrow-band-selected H α emitters (HAEs) in the Spiderweb protocluster at z = 2.16. Based on res... Read More about Signs of environmental effects on star-forming galaxies in the Spiderweb protocluster at z = 2.16.

Satellite quenching was not important for z ∼1 clusters: Most quenching occurred during infall (2021)
Journal Article
Werner, S. V., Hatch, N. A., Muzzin, A., van der Burg, R. F. J., Balogh, M. L., Rudnick, G., & Wilson, G. (2022). Satellite quenching was not important for z ∼1 clusters: Most quenching occurred during infall. Monthly Notices of the Royal Astronomical Society, 510(1), 674-686. https://doi.org/10.1093/mnras/stab3484

We quantify the relative importance of environmental quenching versus pre-processing in z ∼1 clusters by analysing the infalling galaxy population in the outskirts of 15 galaxy clusters at 0.8 < z < 1.4 drawn from the GOGREEN and GCLASS surveys. We f... Read More about Satellite quenching was not important for z ∼1 clusters: Most quenching occurred during infall.

COALAS: I. ATCA CO(1-0) survey and luminosity function in the Spiderweb protocluster at z = 2.16 (2021)
Journal Article
Jin, S., Dannerbauer, H., Emonts, B., Serra, P., Lagos, C. D. P., Thomson, A. P., …Ziegler, B. (2021). COALAS: I. ATCA CO(1-0) survey and luminosity function in the Spiderweb protocluster at z = 2.16. Astronomy and Astrophysics, 652, Article A11. https://doi.org/10.1051/0004-6361/202040232

We report a detailed CO(1-0) survey of a galaxy protocluster field at z = 2.16, based on 475 h of observations with the Australia Telescope Compact Array. We constructed a large mosaic of 13 individual pointings, covering an area of 21 arcmin2 and ±6... Read More about COALAS: I. ATCA CO(1-0) survey and luminosity function in the Spiderweb protocluster at z = 2.16.

Searching for the shadows of giants II: the effect of local ionisation on the Lyman-alpha absorption signatures of protoclusters at redshift z=2.4 (2021)
Journal Article
Miller, J., Bolton, J., & Hatch, N. (2021). Searching for the shadows of giants II: the effect of local ionisation on the Lyman-alpha absorption signatures of protoclusters at redshift z=2.4. Monthly Notices of the Royal Astronomical Society, 506(4), 6001-6013. https://doi.org/10.1093/mnras/stab2083

Local variations in the intergalactic medium (IGM) neutral hydrogen fraction will affect the Ly α absorption signature of protoclusters identified in tomographic surveys. Using the IllustrisTNG simulations, we investigate how the AGN proximity effect... Read More about Searching for the shadows of giants II: the effect of local ionisation on the Lyman-alpha absorption signatures of protoclusters at redshift z=2.4.

Clusters’ far-reaching influence on narrow-angle tail radio galaxies (2021)
Journal Article
de Vos, K., Hatch, N. A., Merrifield, M. R., & Mingo, B. (2021). Clusters’ far-reaching influence on narrow-angle tail radio galaxies. Monthly Notices of the Royal Astronomical Society: Letters, 506(1), L55-L58. https://doi.org/10.1093/mnrasl/slab075

In order to study the ram-pressure interaction between radio galaxies and the intracluster medium, we analyse a sample of 208 highly bent narrow-angle tail radio sources (NATs) in clusters, detected by the Low-Frequency Array Two-metre Sky Survey. Fo... Read More about Clusters’ far-reaching influence on narrow-angle tail radio galaxies.

The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models (2021)
Journal Article
Šoltinskí, T., Bolton, J. S., Hatch, N., Haehnelt, M. G., Keating, L. C., Kulkarni, G., …Aubert, D. (2021). The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models. Monthly Notices of the Royal Astronomical Society, 506(4), 5818–5835. https://doi.org/10.1093/mnras/stab1830

A late end to reionization at redshift z ≈ 5.3 is consistent with observed spatial variations in the Ly α forest transmission and the deficit of Ly α emitting galaxies around extended Ly α absorption troughs at z = 5.5. In this model, large islands o... Read More about The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models.

The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models (2021)
Journal Article
Šoltinsky, T., Bolton, J. S., Hatch, N., Haehnelt, M. G., Keating, L. C., Kulkarni, G., …Aubert, D. (2021). The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models. Monthly Notices of the Royal Astronomical Society, 506(4), 5818-5835. https://doi.org/10.1093/mnras/stab1830

A late end to reionization at redshift z 5.3 is consistent with observed spatial variations in the Ly α forest transmission and the deficit of Ly α emitting galaxies around extended Ly α absorption troughs at z = 5.5. In this model, large islands of... Read More about The detectability of strong 21-cm forest absorbers from the diffuse intergalactic medium in late reionization models.

Massive molecular gas reservoir around the central AGN in the CARLA J1103 + 3449 cluster at z = 1.44 (2020)
Journal Article
Markov, V., Mei, S., Salomé, P., Combes, F., Stern, D., Galametz, A., …Vernet, J. (2020). Massive molecular gas reservoir around the central AGN in the CARLA J1103 + 3449 cluster at z = 1.44. Astronomy and Astrophysics, 641, 1-17. https://doi.org/10.1051/0004-6361/202038673

Passive early-type galaxies dominate cluster cores at z ≲ 1.5. At higher redshift, cluster core galaxies are observed to have on-going star-formation, which is fueled by cold molecular gas. We measured the molecular gas reservoir of the central regio... Read More about Massive molecular gas reservoir around the central AGN in the CARLA J1103 + 3449 cluster at z = 1.44.