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The splash beneath the largest radio bubble in a cluster core
H. R. Russell, P. E. J. Nulsen, A. C. Fabian +3
We present a 100 ks XRISM Resolve observation of the Ophiuchus cluster that measures turbulence and bulk motion in the wake of the largest radio bubble on the sky. We detect a sign…
Complex Velocity Structure of Nebular Gas in Active Galaxies Centred in Cooling X-ray Atmospheres
Marie-Joëlle Gingras, Alison L. Coil, B. R. McNamara +6
[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 o…
Measuring the ICM velocity structure in the Ophiuchus cluster
Efrain Gatuzz, J. S. Sanders, K. Dennerl +8
We have found evidence of bulk velocities following active galactic nucleus (AGN) bubbles in the Virgo cluster and galaxy motions in the Centaurus cluster. In order to increase the…
Radio jet-ISM interaction and positive radio-mechanical feedback in Abell 1795
Prathamesh D. Tamhane, Brian R. McNamara, Helen R. Russell +8
We present XSHOOTER observations with previous ALMA, MUSE and observations to study the nature of radio-jet triggered star formation and the interaction of radio jets with th…
Does absorption against AGN reveal supermassive black hole accretion?
Tom Rose, B. R. McNamara, F. Combes +7
Galaxies often contain large reservoirs of molecular gas which shape their evolution. This can be through cooling of the gas -- which leads to star formation, or accretion onto the…
Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback
Prathamesh D. Tamhane, Brian R. McNamara, Helen R. Russell +4
Molecular gas flows are analyzed in 14 cluster galaxies (BCGs) centered in cooling hot atmospheres. The BCGs contain of molecular gas, much of which is…
Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star Forming Brightest Cluster Galaxies
Michael S. Calzadilla, Michael McDonald, Megan Donahue +8
We present new, deep, narrow- and broad-band Hubble Space Telescope observations of seven of the most star-forming brightest cluster galaxies (BCGs). Continuum-subtracted [O II] ma…
Atmospheric pressure and molecular cloud formation in early-type galaxies
Iurii Babyk, Brian McNamara, Paul Nulsen +3
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 atmospher…
Evidence of runaway gas cooling in the absence of supermassive black hole feedback at the epoch of cluster formation
J. Hlavacek-Larrondo, C. L. Rhea, T. Webb +17
Cosmological simulations, as well as mounting evidence from observations, have shown that supermassive black holes play a fundamental role in regulating the formation of stars thro…
A molecular absorption line survey toward the AGN of Hydra-A
Tom Rose, A. C. Edge, F. Combes +16
We present Atacama Large Millimeter/submillimeter Array observations of the brightest cluster galaxy Hydra-A, a nearby () giant elliptical galaxy with powerful and extende…
Driving massive molecular gas flows in central cluster galaxies with AGN feedback
H. R. Russell, B. R. McNamara, A. C. Fabian +7
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 ga…
An enormous molecular gas flow in the RXJ0821+0752 galaxy cluster
A. N. Vantyghem, B. R. McNamara, H. R. Russell +6
We present recent {\it Chandra} X-ray observations of the RXJ0821.0+0752 galaxy cluster in addition to ALMA observations of the CO(1-0) and CO(3-2) line emission tracing the molecu…
A Galaxy-Scale Fountain of Cold Molecular Gas Pumped by a Black Hole
Grant R. Tremblay, Françoise Combes, J. B. Raymond Oonk +36
We present ALMA and MUSE observations of the Brightest Cluster Galaxy in Abell 2597, a nearby (z=0.0821) cool core cluster of galaxies. The data map the kinematics of a three billi…
Molecular gas filaments and star-forming knots beneath an X-ray cavity in RXC J1504-0248
A. N. Vantyghem, B. R. McNamara, H. R. Russell +6
We present recent ALMA observations of the CO(1-0) and CO(3-2) emission lines in the brightest cluster galaxy of RXCJ1504.10248, which is one of the most extreme cool core clust…
The Origin of Molecular Clouds In Central Galaxies
F. A. Pulido, B. R. McNamara, A. C. Edge +6
We present an analysis of 55 central galaxies in clusters and groups with molecular gas masses and star formation rates lying between and $M_{…
Close entrainment of massive molecular gas flows by radio bubbles in the central galaxy of Abell 1795
H. R. Russell, B. R. McNamara, A. C. Fabian +8
We present new ALMA observations tracing the morphology and velocity structure of the molecular gas in the central galaxy of the cluster Abell 1795. The molecular gas lies in two f…
The Onset of Thermally Unstable Cooling from the Hot Atmospheres of Giant Galaxies in Clusters - Constraints on Feedback Models
M. T. Hogan, B. R. McNamara, F. Pulido +7
We present accurate mass and thermodynamic profiles for a sample of 56 galaxy clusters observed with the Chandra X-ray Observatory. We investigate the effects of local gravitationa…
Star formation in a galactic outflow
R. Maiolino, H. R. Russell, A. C. Fabian +13
Recent observations have revealed massive galactic molecular outflows that may have physical conditions (high gas densities) required to form stars. Indeed, several recent models p…
ALMA observations of massive molecular gas filaments encasing radio bubbles in the Phoenix cluster
H. R. Russell, M. McDonald, B. R. McNamara +11
We report new ALMA observations of the CO(3-2) line emission from the molecular gas reservoir in the central galaxy of the Phoenix c…
Mass Distribution in Galaxy Cluster Cores
M. T. Hogan, B. R. McNamara, F. Pulido +5
Many processes within galaxy clusters, such as those believed to govern the onset of thermally unstable cooling and AGN feedback, are dependent upon local dynamical timescales. How…
Molecular Gas Along a Bright H-alpha Filament in 2A 0335+096 Revealed by ALMA
A. N. Vantyghem, B. R. McNamara, H. R. Russell +17
We present ALMA CO(1-0) and CO(3-2) observations of the brightest cluster galaxy (BCG) in the 2A 0335+096 galaxy cluster (z = 0.0346). The total molecular gas mass of (1.13+/-0.15)…
The Quiescent Intracluster Medium in the Core of the Perseus Cluster
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +213
Clusters of galaxies are the most massive gravitationally-bound objects in the Universe and are still forming. They are thus important probes of cosmological parameters and a host…
A Mechanism for Stimulating AGN Feedback by Lifting Gas in Massive Galaxies
B. R. McNamara, H. R. Russell, P. E. J. Nulsen +4
Observation shows that nebular emission, molecular gas, and young stars in giant galaxies are associated with rising X-ray bubbles inflated by radio jets launched from nuclear blac…
ALMA observations of cold molecular gas filaments trailing rising radio bubbles in PKS0745-191
H. R. Russell, B. R. McNamara, A. C. Fabian +16
We present ALMA observations of the CO(1-0) and CO(3-2) line emission tracing filaments of cold molecular gas in the central galaxy of the cluster PKS0745-191. The total molecular…