Zobrazeno 1 - 10
of 437
pro vyhledávání: '"McNamara, B R"'
Autor:
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.
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
Externí odkaz:
http://arxiv.org/abs/2410.10675
High resolution X-ray spectra reveal hidden cooling flows depositing cold gas at the centres of massive nearby early-type galaxies with little sign of normal star formation. Optical observations are revealing that a bottom-heavy Initial Mass Function
Externí odkaz:
http://arxiv.org/abs/2405.01865
Autor:
Gingras, Marie-Joëlle, Coil, Alison L., McNamara, B. R., Perrotta, Serena, Brighenti, Fabrizio, Russell, H. R., Li, Muzi, Oh, S. Peng, Ning, Wenmeng
[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
Externí odkaz:
http://arxiv.org/abs/2404.02212
Autor:
Rose, Tom, McNamara, B. R., Combes, F., Edge, A. C., McDonald, M., O'Sullivan, Ewan, Russell, H., Fabian, A. C., Ferland, G., Salome, P., Tremblay, G.
We present new ALMA observations of CO, CN, CS, HCN and HCO$^{+}$ absorption seen against the bright and compact radio continuum sources of eight massive galaxies. Combined with archival observations, they reveal two distinct populations of molecular
Externí odkaz:
http://arxiv.org/abs/2403.03974
Autor:
Rose, Tom, McNamara, B. R., Combes, F., Edge, A. C., Russell, H., Salome, P., Tamhane, P., Fabian, A. C., Tremblay, G.
We present new ALMA CO(2-1) observations tracing $2.2 \times 10^{10}$ solar masses 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 molecul
Externí odkaz:
http://arxiv.org/abs/2310.16892
Autor:
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.
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
Externí odkaz:
http://arxiv.org/abs/2310.11491
Recently, we have uncovered Hidden Cooling Flows (HCF) in the X-ray spectra of the central Brightest Galaxies of 11 clusters, 1 group and 2 elliptical galaxies. Here we report such flows in a further 15 objects, consisting of 8 clusters, 3 groups, 3
Externí odkaz:
http://arxiv.org/abs/2306.11077
Autor:
Bambic, C. J., Russell, H. R., Reynolds, C. S., Fabian, A. C., McNamara, B. R., Nulsen, P. E. J.
We present the deepest Chandra observation to date of the galaxy M84 in the Virgo Cluster, with over 840 kiloseconds of data provided by legacy observations and a recent 730 kilosecond campaign. The increased signal-to-noise allows us to study the or
Externí odkaz:
http://arxiv.org/abs/2301.11937
We have recently uncovered Hidden Cooling Flows (HCFs) in the XMM RGS spectra of 3 clusters of galaxies, Centaurus, Perseus and A1835. Here we search for them in a wider sample of objects: the X-ray brightest group NGC5044; 4 moderate X-ray luminosit
Externí odkaz:
http://arxiv.org/abs/2211.13971
Autor:
Rose, Tom, McNamara, B. R., Combes, F., Edge, A. C., Fabian, A. C., Gaspari, M., Russell, H., Salomé, P., Tremblay, G., Ferland, G.
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 central supermassive black hole -- which fuels AGN activity and produ
Externí odkaz:
http://arxiv.org/abs/2210.14922