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dc.contributor.author | Ducci L. | |
dc.contributor.author | Doroshenko V. | |
dc.contributor.author | Suleimanov V. | |
dc.contributor.author | Nikołajuk M. | |
dc.contributor.author | Santangelo A. | |
dc.contributor.author | Ferrigno C. | |
dc.date.accessioned | 2018-09-19T20:04:59Z | |
dc.date.available | 2018-09-19T20:04:59Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/142527 | |
dc.description.abstract | © 2016 ESO.Symbiotic stars are a heterogeneous class of interacting binaries. Among them, RT Cru has been classified as prototype of a subclass that is characterised by hard X-ray spectra that extend past ∼20 keV. We analyse ∼8.6 Ms of archival INTEGRAL data collected during the period 2003-2014, ∼ 140 ks of Swift/XRT data, and a Suzaku observation of 39 ks, to study the spectral X-ray emission and investigate the nature of the compact object. Based on the 2MASS photometry, we estimate the distance to the source of 1.2-2.4 kpc. The X-ray spectrum obtained with Swift/XRT, JEM-X, IBIS/ISGRI, and Suzaku data is well fitted by a cooling flow model modified by an absorber that fully covers the source and two partially covering absorbers. Assuming that the hard X-ray emission of RT Cru originates from an optically thin boundary layer around a non-magnetic white dwarf, we estimated a mass of the white dwarf of MWD ≈ 1.2M⊙. The mass accretion rate obtained for this source might be too high for the optically thin boundary layer scenario. Therefore we investigate other plausible scenarios to model its hard X-ray emission. We show that, alternatively, the observed X-ray spectrum can be explained with the X-ray emission from the post-shock region above the polar caps of a magnetised white dwarf with mass MWD ≈ 0.9-1.1M⊙. | |
dc.relation.ispartofseries | Astronomy and Astrophysics | |
dc.subject | Stars: individual: IGR J12349-6434 | |
dc.subject | Stars: individual: RT Cru | |
dc.subject | White dwarfs | |
dc.subject | X-rays: binaries | |
dc.title | RT Crucis: A look into the X-ray emission of a peculiar symbiotic star | |
dc.type | Article | |
dc.relation.ispartofseries-volume | 592 | |
dc.collection | Публикации сотрудников КФУ | |
dc.source.id | SCOPUS00046361-2016-592-SID84980378195 |