Outputs (23)

Velocity Structure Correlations between the Nebular, Molecular, and Atmospheric Gases in the Cores of Four Cool Core Clusters (2025)
Journal Article
Li, M., Mcnamara, B., Coil, A. L., Gingras, M.-J., Brighenti, F., Russell, H., Tamhaneh, P. D., Peng Oh, S., & Perrotta, S. (2025). Velocity Structure Correlations between the Nebular, Molecular, and Atmospheric Gases in the Cores of Four Cool Core Clusters. Astrophysical Journal, 984(1), Article 22. https://doi.org/10.3847/1538-4357/adc102

We investigate the velocity structure of nebular gas in the central galaxies of four clusters: Abell 1835, PKS 0745-191, Abell 262, and RXJ0820.9+0752, using data from the Keck Cosmic Web Imager (KCWI). Velocity structure functions (VSFs) of the [OII... Read More about Velocity Structure Correlations between the Nebular, Molecular, and Atmospheric Gases in the Cores of Four Cool Core Clusters.

Directly imaging the cooling flow in the Phoenix cluster (2025)
Journal Article
Reefe, M., McDonald, M., Chatzikos, M., Seebeck, J., Mushotzky, R., Veilleux, S., Allen, S. W., Bayliss, M., Calzadilla, M., Canning, R., Floyd, B., Gaspari, M., Hlavacek-Larrondo, J., McNamara, B., Russell, H., Sharon, K., & Somboonpanyakul, T. (2025). Directly imaging the cooling flow in the Phoenix cluster. Nature, 638, 360-364. https://doi.org/10.1038/s41586-024-08369-x

In the centres of many galaxy clusters, the hot (approximately 107 kelvin) intracluster medium can become dense enough that it should cool on short timescales. However, the low measured star formation rates in massive central galaxies and the absence... Read More about Directly imaging the cooling flow in the Phoenix cluster.

Complex Kinematics of Nebular Gas in Active Galaxies Centered in Cooling X-Ray Atmospheres (2024)
Journal Article
Gingras, M.-J., Coil, A. L., McNamara, B. R., Perrotta, S., Brighenti, F., Russell, H. R., Li, M., Oh, S. P., & Ning, W. (2024). Complex Kinematics of Nebular Gas in Active Galaxies Centered in Cooling X-Ray Atmospheres. The Astrophysical Journal, 977(2), Article 159. https://doi.org/10.3847/1538-4357/ad822a

[O ii] emission maps obtained with the Keck Cosmic Web Imager are presented for four galaxies centered in cooling X-ray cluster atmospheres. Nebular emission extending over tens of kiloparsecs is found in systems covering a broad range of atmospheric... Read More about Complex Kinematics of Nebular Gas in Active Galaxies Centered in Cooling X-Ray Atmospheres.

Hidden cooling flows − IV. More details on Centaurus and the efficiency of AGN feedback in clusters (2024)
Journal Article
Fabian, A. C., Ferland, G. J., Sanders, J. S., Russell, H. R., McNamara, B. R., Pinto, C., Hlavacek-Larrondo, J., Walker, S. A., Ivey, L. R., & McDonald, M. (2024). Hidden cooling flows − IV. More details on Centaurus and the efficiency of AGN feedback in clusters. Monthly Notices of the Royal Astronomical Society, 535(3), 2173–2188. https://doi.org/10.1093/mnras/stae2414

Cooling flows are common in galaxy clusters which have cool cores. The soft X-ray emission below 1 keV from the flows is mostly absorbed by cold dusty gas within the central cooling sites. Further evidence for this process is presented here through a... Read More about Hidden cooling flows − IV. More details on Centaurus and the efficiency of AGN feedback in clusters.

Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres (2024)
Journal Article
Gingras, M.-J., Coil, A. L., Mcnamara, B. R., Perrotta, S., Brighenti, F., Russell, H. R., Li, M., Peng Oh, S., & Wenmeng, W. (in press). Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres. Astrophysical Journal,

[OII] emission maps obtained with the Keck Cosmic Web Imager (KCWI) are presented for four galaxies centered in cooling X-ray cluster atmospheres. Nebular emission extending tens of kpc is found in systems covering a broad range of atmospheric coolin... Read More about Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres.

Two distinct molecular cloud populations detected in massive galaxies (2024)
Journal Article
Rose, T., McNamara, B. R., Combes, F., Edge, A. C., McDonald, M., O’Sullivan, E., Russell, H., Fabian, A. C., Ferland, G., Salomé, P., & Tremblay, G. (2024). Two distinct molecular cloud populations detected in massive galaxies. Monthly Notices of the Royal Astronomical Society, 533(1), 771-794. https://doi.org/10.1093/mnras/stae1831

We present new ALMA observations of CO, CN, CS, HCN, and HCO+ absorption seen against the bright and compact radio continuum sources of eight galaxies. Combined with archival observations, they reveal two distinct populations of molecular clouds, whi... Read More about Two distinct molecular cloud populations detected in massive galaxies.

The Evolution of Galaxies and Clusters at High Spatial Resolution with Advanced X-ray Imaging Satellite (AXIS) (2024)
Journal Article
Russell, H. R., Lopez, L. A., Allen, S. W., Chartas, G., Choudhury, P. P., Dupke, R. A., Fabian, A. C., Flores, A. M., Garofali, K., Hodges-Kluck, E., Koss, M. J., Lanz, L., Lehmer, B. D., Li, J.-T., Maksym, W. P., Mantz, A. B., McDonald, M., Miller, E. D., Mushotzky, R. F., Qiu, Y., …Zhang, C. (2024). The Evolution of Galaxies and Clusters at High Spatial Resolution with Advanced X-ray Imaging Satellite (AXIS). Universe, 10(7), Article 273. https://doi.org/10.3390/universe10070273

Stellar and black hole feedback heat and disperse surrounding cold gas clouds, launching gas flows off circumnuclear and galactic disks, producing a dynamic interstellar medium. On large scales bordering the cosmic web, feedback drives enriched gas o... Read More about The Evolution of Galaxies and Clusters at High Spatial Resolution with Advanced X-ray Imaging Satellite (AXIS).

A cooling flow around the low-redshift quasar H1821+643 (2024)
Journal Article
Russell, H. R., Nulsen, P. E., Fabian, A. C., Braben, T. E., Brandt, W. N., Clews, L., McDonald, M., Reynolds, C. S., Sanders, J. S., & Veilleux, S. (2024). A cooling flow around the low-redshift quasar H1821+643. Monthly Notices of the Royal Astronomical Society, 528(2), 1863–1878. https://doi.org/10.1093/mnras/stae026

H1821+643 is the nearest quasar hosted by a galaxy cluster. The energy output by the quasar, in the form of intense radiation and radio jets, is captured by the surrounding hot atmosphere. Here, we present a new deep Chandra observation of H1821+643... Read More about A cooling flow around the low-redshift quasar H1821+643.

A massive multiphase plume of gas in Abell 2390's brightest cluster galaxy (2024)
Journal Article
Rose, T., McNamara, B. R., Combes, F., Edge, A. C., Russell, H., Salomé, P., Tamhane, P., Fabian, A. C., & Tremblay, G. (2024). A massive multiphase plume of gas in Abell 2390's brightest cluster galaxy. Monthly Notices of the Royal Astronomical Society, 528(2), 3441–3455. https://doi.org/10.1093/mnras/stae213

We present new ALMA CO(2-1) observations tracing 2.2 × 10 10 M ⊙ of molecular gas in Abell 2390's brightest cluster galaxy, where half the gas is located in a one-sided plume extending 15 kpc out from the galaxy centre. This molecular gas has a smoot... Read More about A massive multiphase plume of gas in Abell 2390's brightest cluster galaxy.

Constraints on thermal conductivity in the merging cluster Abell 2146 (2023)
Journal Article
Richard-Laferrière, A., Russell, H. R., Fabian, A. C., Chadayammuri, U., Reynolds, C. S., Canning, R. E. A., Edge, A. C., Hlavacek-Larrondo, J., King, L. J., Mcnamara, B. R., Nulsen, P. E. J., & Sanders, J. S. (2023). Constraints on thermal conductivity in the merging cluster Abell 2146. Monthly Notices of the Royal Astronomical Society, 526(4), 6205–6213

The cluster of galaxies Abell 2146 is undergoing a major merger and is an ideal cluster to study ICM physics, as it has a simple geometry with the merger axis in the plane of the sky, its distance allows us to resolve features across the relevant sca... Read More about Constraints on thermal conductivity in the merging cluster Abell 2146.