Show simple item record

dc.contributor.authorFabian, Andrewen
dc.contributor.authorWalker, Stephenen
dc.contributor.authorRussell, Helenen
dc.contributor.authorPinto, Ciroen
dc.contributor.authorSanders, JSen
dc.contributor.authorReynolds, Christopheren
dc.date.accessioned2017-01-16T13:16:05Z
dc.date.available2017-01-16T13:16:05Z
dc.date.issued2017-01-01en
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/261878
dc.description.abstractThe 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.sponsorshipACF, 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.isoenen
dc.publisherOxford University Press
dc.subjectgalaxies: clusters: intracluster mediumen
dc.subjectX-rays: galaxiesen
dc.titleDo sound waves transport the AGN energy in the Perseus cluster?en
dc.typeArticle
prism.endingPageL5
prism.issueIdentifier1en
prism.publicationDate2017en
prism.publicationNameMonthly Notices of the Royal Astronomical Society: Lettersen
prism.startingPageL1
prism.volume464en
dc.identifier.doi10.17863/CAM.7109
dcterms.dateAccepted2016-08-24en
rioxxterms.versionofrecord10.1093/mnrasl/slw170en
rioxxterms.versionVoRen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-01-01en
dc.contributor.orcidFabian, Andrew [0000-0002-9378-4072]
dc.contributor.orcidPinto, Ciro [0000-0003-2532-7379]
dc.contributor.orcidReynolds, Christopher [0000-0002-1510-4860]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Research Council (340442)
pubs.funder-project-idSCIENCE & TECHNOLOGY FACILITIES COUNCIL (ST/N000927/1)
cam.issuedOnline2016-08-30en
cam.orpheus.successThu Jan 30 12:56:48 GMT 2020 - The item has an open VoR version.*
rioxxterms.freetoread.startdate2100-01-01


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record