The spectral energy distribution of D-type symbiotic stars: the role of dust shells

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dc.contributor.authorAngeloni, R.
dc.contributor.authorContini, M.
dc.contributor.authorCiroi, S.
dc.contributor.authorRafanelli, P.
dc.date.accessioned2025-01-21T00:06:31Z
dc.date.available2025-01-21T00:06:31Z
dc.date.issued2010
dc.description.abstractWe have collected continuum data of a sample of D-type symbiotic stars. By modelling their spectral energy distribution in a colliding-wind theoretical scenario we have found characteristics common to all the systems: (1) at least two dust shells are clearly present, one at similar to 1000 K and the other at similar to 400 K; they dominate the emission in the infrared; (2) the radio data are explained by thermal self-absorbed emission from the reverse shock between the stars; while (3) the data in the long wavelength tail come from the expanding shock outwards the system; (4) in some symbiotic stars, the contribution from the white dwarf in the UV is directly seen. Finally, (5) for some objects soft X-ray emitted by bremsstrahlung downstream of the reverse shock between the stars is predicted. The results thus confirm the validity of the colliding-wind model and the important role of the shocks. The comparison of the fluxes calculated at the nebula with those observed at the Earth reveals the distribution throughout the system of the different components, in particular the nebulae and the dust shells. The correlation of shell radii with the orbital period shows that larger radii are found at larger periods. Moreover, the temperatures of the dust shells regarding the sample are found at similar to 1000 and < 400 K, while in the case of late giants they spread more uniformly throughout the same range.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1365-2966.2009.16067.x
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1111/j.1365-2966.2009.16067.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95592
dc.identifier.wosidWOS:000274483500058
dc.issue.numero3
dc.language.isoen
dc.pagina.final2086
dc.pagina.inicio2075
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectbinaries: symbiotic
dc.subjectstars: individual: SS73 38
dc.subjectstars: individual: V835 Cen
dc.subjectstars: individual: HM Sge
dc.subjectstars: individual: V1016 Cyg
dc.subjectstars: individual: V627 Cas
dc.titleThe spectral energy distribution of D-type symbiotic stars: the role of dust shells
dc.typeartículo
dc.volumen402
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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