Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24595
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Basu, K. | en_US |
dc.contributor.author | Sommer, M. | en_US |
dc.contributor.author | Erler, J. | en_US |
dc.contributor.author | Eckert, D. | en_US |
dc.contributor.author | VAZZA, FRANCO | en_US |
dc.contributor.author | Magnelli, B. | en_US |
dc.contributor.author | Bertoldi, F. | en_US |
dc.contributor.author | TOZZI, Paolo | en_US |
dc.date.accessioned | 2020-05-07T13:06:15Z | - |
dc.date.available | 2020-05-07T13:06:15Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24595 | - |
dc.description.abstract | We present ALMA measurements of a merger shock using the thermal Sunyaev-Zel’dovich (SZ) effect signal, at the location of a radio relic in the famous El Gordo galaxy cluster at z≈ 0.9. Multi-wavelength analysis in combination with the archival Chandra data and a high-resolution radio image provides a consistent picture of the thermal and non-thermal signal variation across the shock front and helps to put robust constraints on the shock Mach number as well as the relic magnetic field. We employ a Bayesian analysis technique for modeling the SZ and X-ray data self-consistently, illustrating respective parameter degeneracies. Combined results indicate a shock with Mach number { M }={2.4}<SUB>-0.6</SUB><SUP>+1.3</SUP>, which in turn suggests a high value of the magnetic field (of the order of 4-10 μ {{G}}) to account for the observed relic width at 2 GHz. At roughly half the current age of the universe, this is the highest-redshift direct detection of a cluster shock to date, and one of the first instances of an ALMA-SZ observation in a galaxy cluster. It shows the tremendous potential for future ALMA-SZ observations to detect merger shocks and other cluster substructures out to the highest redshifts. | en_US |
dc.language.iso | eng | en_US |
dc.title | ALMA-SZ Detection of a Galaxy Cluster Merger Shock at Half the Age of the Universe | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8205/829/2/L23 | en_US |
dc.identifier.scopus | 2-s2.0-84991111345 | en_US |
dc.identifier.isi | 000385412300002 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8205/829/2/L23 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 829 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | L23 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 8 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL LETTERS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016ApJ...829L..23B | 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 | IRA Bologna | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-2821-7928 | - |
crisitem.author.orcid | 0000-0003-3096-9966 | - |
crisitem.journal.journalissn | 2041-8205 | - |
crisitem.journal.ance | E196528 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Basu_2016_ApJL_829_L23.pdf | PDF editoriale | 1.01 MB | Adobe PDF | View/Open |
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