Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/26686
DC Field | Value | Language |
---|---|---|
dc.contributor.author | LETO, PAOLO | en_US |
dc.contributor.author | TRIGILIO, CORRADO | en_US |
dc.contributor.author | Oskinova, L. | en_US |
dc.contributor.author | Ignace, R. | en_US |
dc.contributor.author | BUEMI, CARLA SIMONA | en_US |
dc.contributor.author | UMANA, Grazia Maria Gloria | en_US |
dc.contributor.author | INGALLINERA, Adriano | en_US |
dc.contributor.author | Todt, H. | en_US |
dc.contributor.author | LEONE, FRANCESCO | en_US |
dc.date.accessioned | 2020-08-04T10:26:30Z | - |
dc.date.available | 2020-08-04T10:26:30Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/26686 | - |
dc.description.abstract | In this paper, we investigate the multiwavelength properties of the magnetic early B-type star HR 7355. We present its radio light curves at several frequencies, taken with the Jansky Very Large Array, and X-ray spectra, taken with the XMM-Newton X-ray telescope. Modelling of the radio light curves for the Stokes I and V provides a quantitative analysis of the HR 7355 magnetosphere. A comparison between HR 7355 and a similar analysis for the Ap star CU Vir allows us to study how the different physical parameters of the two stars affect the structure of the respective magnetospheres where the non-thermal electrons originate. Our model includes a cold thermal plasma component that accumulates at high magnetic latitudes that influences the radio regime, but does not give rise to X-ray emission. Instead, the thermal X-ray emission arises from shocks generated by wind stream collisions close to the magnetic equatorial plane. The analysis of the X-ray spectrum of HR 7355 also suggests the presence of a non-thermal radiation. Comparison between the spectral index of the power-law X-ray energy distribution with the non-thermal electron energy distribution indicates that the non-thermal X-ray component could be the auroral signature of the non-thermal electrons that impact the stellar surface, the same non-thermal electrons that are responsible for the observed radio emission. On the basis of our analysis, we suggest a novel model that simultaneously explains the X-ray and the radio features of HR 7355 and is likely relevant for magnetospheres of other magnetic early-type stars. | en_US |
dc.language.iso | eng | en_US |
dc.title | The detection of variable radio emission from the fast rotating magnetic hot B-star HR7355 and evidence for its X-ray aurorae | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx267 | en_US |
dc.identifier.scopus | 2-s2.0-85031785345 | en_US |
dc.identifier.isi | 000398419400025 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/467/3/2820/2966028 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 467 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 2820 | en_US |
dc.relation.lastpage | 2833 | en_US |
dc.relation.numberofpages | 15 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 9 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | DEU | 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 | en_US |
dc.identifier.adsbibcode | 2017MNRAS.467.2820L | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | 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.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0003-4864-2806 | - |
crisitem.author.orcid | 0000-0002-1216-7831 | - |
crisitem.author.orcid | 0000-0002-7288-4613 | - |
crisitem.author.orcid | 0000-0002-6972-8388 | - |
crisitem.author.orcid | 0000-0002-3137-473X | - |
crisitem.author.orcid | 0000-0001-7626-3788 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1701.07679.pdf | postprint | 989.29 kB | Adobe PDF | View/Open |
stx267.pdf | PDF editoriale | 1.48 MB | Adobe PDF | View/Open |
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