Do sound waves transport the AGN energy in the Perseus cluster?
dc.contributor.author | Fabian, Andrew | en |
dc.contributor.author | Walker, Stephen | en |
dc.contributor.author | Russell, Helen | en |
dc.contributor.author | Pinto, Ciro | en |
dc.contributor.author | Sanders, JS | en |
dc.contributor.author | Reynolds, Christopher | en |
dc.date.accessioned | 2017-01-16T13:16:05Z | |
dc.date.available | 2017-01-16T13:16:05Z | |
dc.date.issued | 2017-01-01 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | https://www.repository.cam.ac.uk/handle/1810/261878 | |
dc.description.abstract | The level of random motions in the intracluster gas lying between 20 and 60 kpc radius in the core of the Perseus cluster has been measured by the Hitomi Soft X-ray Spectrometer (SXS) at 164 ± 10 km s$^{−1}$ . The maximum energy density in turbulent motions on that scale is therefore low. If dissipated as heat, the turbulent energy will be radiated away in less than 80 Myr and cannot spread across the core. A higher velocity is needed to prevent a cooling collapse. Gravity waves are shown to travel too slowly in a radial direction. Here we investigate propagation of energy by sound waves. The energy travels at ~1000 km s$^{−1}$ and can cross the core in a cooling time. We show that the displacement velocity amplitude of the gas required to carry the power is consistent with the Hitomi result and that the inferred density and temperature variations are consistent with $\textit{Chandra}$ observations. | |
dc.description.sponsorship | ACF, CP, CSR and HRR thank the Hitomi collaboration for the opportunity to participate in the analysis of the SXS data. ACF, CP, HRR and SAW acknowledge support from ERC Advanced Grant FEEDBACK, 340442. | |
dc.language.iso | en | en |
dc.publisher | Oxford University Press | |
dc.subject | galaxies: clusters: intracluster medium | en |
dc.subject | X-rays: galaxies | en |
dc.title | Do sound waves transport the AGN energy in the Perseus cluster? | en |
dc.type | Article | |
prism.endingPage | L5 | |
prism.issueIdentifier | 1 | en |
prism.publicationDate | 2017 | en |
prism.publicationName | Monthly Notices of the Royal Astronomical Society: Letters | en |
prism.startingPage | L1 | |
prism.volume | 464 | en |
dc.identifier.doi | 10.17863/CAM.7109 | |
dcterms.dateAccepted | 2016-08-24 | en |
rioxxterms.versionofrecord | 10.1093/mnrasl/slw170 | en |
rioxxterms.version | VoR | en |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | en |
rioxxterms.licenseref.startdate | 2017-01-01 | en |
dc.contributor.orcid | Fabian, Andrew [0000-0002-9378-4072] | |
dc.contributor.orcid | Pinto, Ciro [0000-0003-2532-7379] | |
dc.contributor.orcid | Reynolds, Christopher [0000-0002-1510-4860] | |
dc.identifier.eissn | 1365-2966 | |
rioxxterms.type | Journal Article/Review | en |
pubs.funder-project-id | European Research Council (340442) | |
pubs.funder-project-id | SCIENCE & TECHNOLOGY FACILITIES COUNCIL (ST/N000927/1) | |
cam.issuedOnline | 2016-08-30 | en |
cam.orpheus.success | Thu Jan 30 12:56:48 GMT 2020 - The item has an open VoR version. | * |
rioxxterms.freetoread.startdate | 2100-01-01 |
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