Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29401
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kuznetsova, Ekaterina | en_US |
dc.contributor.author | Krivonos, Roman | en_US |
dc.contributor.author | Clavel, Maïca | en_US |
dc.contributor.author | Lutovinov, Alexander | en_US |
dc.contributor.author | Chernyshov, Dmitry | en_US |
dc.contributor.author | Hong, JaeSub | en_US |
dc.contributor.author | Mori, Kaya | en_US |
dc.contributor.author | PONTI, GABRIELE | en_US |
dc.contributor.author | Tomsick, John | en_US |
dc.contributor.author | Zhang, Shuo | en_US |
dc.date.accessioned | 2020-12-30T17:08:07Z | - |
dc.date.available | 2020-12-30T17:08:07Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29401 | - |
dc.description.abstract | Recent NuSTAR and XMM-Newton observations of the molecular cloud around the Arches stellar cluster demonstrate a dramatic change both in morphology and intensity of its non-thermal X-ray emission, similar to that observed in many molecular clouds of the Central Molecular Zone at the Galactic Center. These variations trace the propagation of illuminating fronts, presumably induced by past flaring activities of Sgr A<SUP>⋆</SUP>. In this paper, we present results of a long NuSTAR observation of the Arches complex in 2016, taken a year after the previous XMM+NuSTAR observations which revealed a strong decline in the cloud emission. The 2016 NuSTAR observation shows that both the non-thermal continuum emission and the Fe K<SUB>α</SUB> 6.4 keV line flux are consistent with the level measured in 2015. No significant variation has been detected in both spectral shape and Fe K<SUB>α</SUB> equivalent width EW<SUB>6.4 keV</SUB>, which may be interpreted as the intensity of the Arches non-thermal emission reaching its stationary level. At the same time, the measured 2016 non-thermal flux is not formally in disagreement with the declining trend observed in 2007-2015. Thus, we cannot assess whether the non-thermal emission has reached a stationary level in 2016, and new observations, separated by a longer time period, are needed to draw stringent conclusions. Detailed spectral analysis of three bright clumps of the Arches molecular cloud performed for the first time showed different EW<SUB>6.4 keV</SUB> and absorption. This is a strong hint that the X-ray emission from the molecular cloud is a mix of two components with different origins. | en_US |
dc.language.iso | eng | en_US |
dc.title | Investigating the origin of the faint non-thermal emission of the Arches cluster using the 2015-2016 NuSTAR and XMM-Newton X-ray observations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz119 | en_US |
dc.identifier.scopus | 2-s2.0-85063402056 | en_US |
dc.identifier.isi | 000462302600015 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/484/2/1627/5289887 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 484 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1627 | en_US |
dc.type.referee | REF_1 | 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 | 2019MNRAS.484.1627K | 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 | O.A. Brera | - |
crisitem.author.orcid | 0000-0003-0293-3608 | - |
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 | |
---|---|---|---|---|
1901.03121.pdf | preprint | 1.82 MB | Adobe PDF | View/Open |
stz119.pdf | pdf editoriale | 3.99 MB | Adobe PDF | View/Open |
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