Skip to main content

Research Repository

Advanced Search

HELEN RUSSELL's Outputs (3)

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.