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dc.contributor.authorSiemiginowska, Aneta
dc.contributor.authorSobolewska, Malgosia
dc.contributor.authorMigliori, Giulia
dc.contributor.authorGuainazzi, Matteo
dc.contributor.authorHardcastle, M.J.
dc.contributor.authorOstorero, Luisa
dc.contributor.authorStawarz, Lukasz
dc.date.accessioned2017-01-26T19:12:48Z
dc.date.available2017-01-26T19:12:48Z
dc.date.issued2016-05-23
dc.identifier.citationSiemiginowska , A , Sobolewska , M , Migliori , G , Guainazzi , M , Hardcastle , M J , Ostorero , L & Stawarz , L 2016 , ' X-ray properties of the Youngest Radio Sources and their Environments ' , The Astrophysical Journal , vol. 823 , no. 1 . https://doi.org/10.3847/0004-637X/823/1/57
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 10001789
dc.identifier.otherPURE UUID: e6af7b84-1299-4c99-940a-c9f6d50a8325
dc.identifier.otherArXiv: http://arxiv.org/abs/1603.00947v1
dc.identifier.otherScopus: 84971595200
dc.identifier.urihttp://hdl.handle.net/2299/17573
dc.descriptionThis is the peer-reviewed version of the following article: A. Siemiginowska, M. Sobolewska, G. Migliori, M. Guainazzi, M. Hardcaste, L. Ostorero and L. Stawarz, ‘X-Ray properties of the youngest radio sources and their environments’, The Astrophysical Journal, Vol 823(1), first published online May 23, 2016, which has been published in final form at doi: http://dx.doi.org/10.3847/0004-637X/823/1/57 © 2016. The American Astronomical Society. All rights reserved.
dc.description.abstractWe present the first results from our X-ray study of young radio sources classified as compact symmetric objects (CSOs). Using the Chandra X-ray Observatory we observed six CSOs for the first time in X-rays, and re-observed four CSOs already observed with XMM-Newton or BeppoSAX. We also included six other CSOs with archival data to built a pilot study of a sample of the 16 CSO sources observed in X-rays to date. All the sources are nearby, $z\lt 1$, and the age of their radio structures ($\lt 3000$ yr) has been derived from the expansion velocity of their hot spots. Our results show the heterogeneous nature of the CSOs' X-ray emission, indicating a complex environment associated with young radio sources. The sample covers a range in X-ray luminosity, ${L}_{2\mbox{--}10\mathrm{keV}}\sim {10}^{41}$–1045 erg s−1, and intrinsic absorbing column density of ${N}_{{\rm{H}}}\simeq {10}^{21}$–1022 cm−2. In particular, we detected extended X-ray emission in 1718−649; a hard photon index of ${\rm{\Gamma }}\simeq 1$ in 2021+614 and 1511+0518 consistent with either a Compton-thick absorber or non-thermal emission from compact radio lobes, and in 0710+439 an ionized iron emission line at ${E}_{\mathrm{rest}}=(6.62\pm 0.04)$ keV and EW $\sim 0.15$–1.4 keV, and a decrease by an order of magnitude in the 2–10 keV flux since the 2008 XMM-Newton observation in 1607+26. We conclude that our pilot study of CSOs provides a variety of exceptional diagnostics and highlights the importance of deep X-ray observations of large samples of young sources. This is necessary in order to constrain theoretical models for the earliest stage of radio source evolution and to study the interactions of young radio sources with the interstellar environment of their host galaxies.en
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.rightsOpen
dc.subjectastro-ph.GA
dc.subjectastro-ph.HE
dc.subjectgalaxies:active
dc.subjectgalaxies:jets
dc.subjectx-rays:galaxies
dc.titleX-ray properties of the Youngest Radio Sources and their Environmentsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2016-05-23
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.3847/0004-637X/823/1/57
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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