Outputs (15)

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., …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., …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., …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.

AGN feeding and feedback in M84: from kiloparsec scales to the Bondi radius (2023)
Journal Article
Bambic, C. J., Russell, H. R., Reynolds, C. S., Fabian, A. C., McNamara, B. R., & Nulsen, P. E. J. (2023). AGN feeding and feedback in M84: from kiloparsec scales to the Bondi radius. Monthly Notices of the Royal Astronomical Society, 522(3), 4374-4391. https://doi.org/10.1093/mnras/stad824

We present the deepest Chandra observation to date of the galaxy M84 in the Virgo Cluster, with over 840 ks of data provided by legacy observations and a recent 730 ks campaign. The increased signal-to-noise ratio allows us to study the origins of th... Read More about AGN feeding and feedback in M84: from kiloparsec scales to the Bondi radius.

Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star-forming Brightest Cluster Galaxies (2022)
Journal Article
Calzadilla, M. S., McDonald, M., Donahue, M., McNamara, B. R., Fogarty, K., Gaspari, M., …Ubertosi, F. (2022). Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star-forming Brightest Cluster Galaxies. Astrophysical Journal, 940(2), Article 140. https://doi.org/10.3847/1538-4357/ac9790

We present new, deep, narrow- and broadband Hubble Space Telescope observations of seven of the most star-forming brightest cluster galaxies (BCGs). Continuum-subtracted [OII] maps reveal the detailed, complex structure of warm (T ∼ 104 K) ionized ga... Read More about Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star-forming Brightest Cluster Galaxies.

The structure of cluster merger shocks: turbulent width and the electron heating time-scale (2022)
Journal Article
Russell, H. R., Nulsen, P. E. J., Caprioli, D., Chadayammuri, U., Fabian, A. C., Kunz, M. W., …King, L. .. (2022). The structure of cluster merger shocks: turbulent width and the electron heating time-scale. Monthly Notices of the Royal Astronomical Society, 514(1), 1477-1493. https://doi.org/10.1093/mnras/stac1055

We present a new 2 Ms Chandra observation of the cluster merger Abell 2146, which hosts two huge M∼2 shock fronts each ∼500 kpc across. For the first time, we resolve and measure the width of cluster merger shocks. The best-fit width for the bow shoc... Read More about The structure of cluster merger shocks: turbulent width and the electron heating time-scale.

Turbulent magnetic fields in merging clusters: a case study of Abell 2146 (2022)
Journal Article
Chadayammuri, U., ZuHone, J., Nulsen, P., Nagai, D., & Russell, H. (2022). Turbulent magnetic fields in merging clusters: a case study of Abell 2146. Monthly Notices of the Royal Astronomical Society, 512(2), 2157-2170. https://doi.org/10.1093/mnras/stac594

Kelvin-Helmholtz instabilities (KHI) along contact discontinuities in galaxy clusters have been used to constrain the strength of magnetic fields in galaxy clusters, following the assumption that, as magnetic field lines drape around the interface be... Read More about Turbulent magnetic fields in merging clusters: a case study of Abell 2146.

New constraints on light axion-like particles using Chandra transmission grating spectroscopy of the powerful cluster-hosted quasar H1821+643 (2021)
Journal Article
Sisk-Reynés, J., Matthews, J. H., Reynolds, C. S., Russell, H. R., Smith, R. N., & Marsh, M. C. (2022). New constraints on light axion-like particles using Chandra transmission grating spectroscopy of the powerful cluster-hosted quasar H1821+643. Monthly Notices of the Royal Astronomical Society, 510(1), 1264-1277. https://doi.org/10.1093/mnras/stab3464

Axion-like particles (ALPs) are predicted by several Beyond the Standard Model theories, in particular, string theory. In the presence of an external magnetic field perpendicular to the direction of propagation, ALPs can couple to photons. Therefore,... Read More about New constraints on light axion-like particles using Chandra transmission grating spectroscopy of the powerful cluster-hosted quasar H1821+643.

Driving massive molecular gas flows in central cluster galaxies with AGN feedback (2019)
Journal Article
Russell, H. R., McNamara, B. R., Fabian, A. C., Nulsen, P. E. J., Combes, F., Edge, A. C., …Vantyghem, A. N. (2019). Driving massive molecular gas flows in central cluster galaxies with AGN feedback. Monthly Notices of the Royal Astronomical Society, 490(3), 3025-3045. https://doi.org/10.1093/mnras/stz2719

We present an analysis of new and archival ALMA observations of molecular gas in twelve central cluster galaxies. We examine emerging trends in molecular filament morphology and gas velocities to understand their origins. Molecular gas masses in thes... Read More about Driving massive molecular gas flows in central cluster galaxies with AGN feedback.

Star formation inside a galactic outflow (2017)
Journal Article
Maiolino, R., Russell, H. R., Fabian, A. C., Carniani, S., Gallagher, R., Cazzoli, S., …Sturm, E. (2017). Star formation inside a galactic outflow. Nature, 544(7649), 202-206. https://doi.org/10.1038/nature21677

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Recent observations have revealed massive galactic molecular outflows that may have the physical conditions (high gas densities) required to form stars. Indeed, severa... Read More about Star formation inside a galactic outflow.