Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24766
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Botteon, A. | en_US |
dc.contributor.author | GASTALDELLO, FABIO | en_US |
dc.contributor.author | BRUNETTI, GIANFRANCO | en_US |
dc.contributor.author | Dallacasa, Daniele | en_US |
dc.date.accessioned | 2020-05-13T07:23:59Z | - |
dc.date.available | 2020-05-13T07:23:59Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24766 | - |
dc.description.abstract | We analysed a deep Chandra observation (334 ks) of the galaxy cluster Abell 115 and detected a shock cospatial with the radio relic. The X-ray surface brightness profile across the shock region presents a discontinuity, corresponding to a density compression factor C=2.0± 0.1, leading to a Mach number M=1.7± 0.1 (M=1.4-2 including systematics). Temperatures measured in the upstream and downstream regions are consistent with what expected for such a shock: T<SUB>u</SUB>=4.3<SUP>+1.0</SUP><SUB>-0.6</SUB> keV and T<SUB>d</SUB>=7.9<SUP>+1.4</SUP><SUB>-1.1</SUB> keV, respectively, implying a Mach number M=1.8<SUP>+0.5</SUP><SUB>-0.4</SUB>. So far, only few other shocks discovered in galaxy clusters are consistently detected from both density and temperature jumps. The spatial coincidence between this discontinuity and the radio relic edge strongly supports the view that shocks play a crucial role in powering these synchrotron sources. We suggest that the relic is originated by shock re-acceleration of relativistic electrons rather than acceleration from the thermal pool. The position and curvature of the shock and the associated relic are consistent with an off-axis merger with unequal mass ratio where the shock is expected to bend around the core of the less massive cluster. | en_US |
dc.language.iso | eng | en_US |
dc.title | A shock at the radio relic position in Abell 115 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slw082 | en_US |
dc.identifier.scopus | 2-s2.0-84978420214 | en_US |
dc.identifier.isi | 000379832000018 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/460/1/L84/2589744 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 460 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L84 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | no | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.460L..84B | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0002-9112-0184 | - |
crisitem.author.orcid | 0000-0003-4195-8613 | - |
crisitem.author.orcid | 0000-0003-1246-6492 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Mon. Not. R. Astron. Soc Lett. 2016 Botteon.pdf | PDF editoriale | 2.04 MB | Adobe PDF | View/Open |
1604.07823.pdf | postprint | 493 kB | Adobe PDF | View/Open |
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