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Non-LTE models for neutron star atmospheres and supernova-fallback disks

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dc.contributor.author Werner K.
dc.contributor.author Nagel T.
dc.contributor.author Rauch T.
dc.contributor.author Suleimanov V.
dc.date.accessioned 2018-09-18T20:07:36Z
dc.date.available 2018-09-18T20:07:36Z
dc.date.issued 2007
dc.identifier.issn 0273-1177
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136760
dc.description.abstract We describe our recent progress in modeling supernova-fallback disks and neutron star (NS) atmospheres. We present a first detailed spectrum synthesis calculation of a SN-fallback disk composed of iron. We assume a thin disk with a radial structure described by the α-disk model. The vertical structure and emission spectrum are computed self-consistently by solving the structure equations simultaneously with the radiation transfer equations under non-LTE conditions. We describe the properties of a specific disk model and discuss various effects on the emergent UV/optical spectrum. We investigate Compton scattering effects on the thermal spectrum of NSs. In addition, we constructed a new generation of metal line-blanketed non-LTE model atmospheres for NSs. It is compared to X-ray burst spectra of EXO 0748-676. It is possible that the gravitational redshift, deduced from absorption lines, is lower (z = 0.24) than hitherto assumed (z = 0.35). Accordingly, this would result in NS mass and radius lower limits of M ≥ 1.63 Mȯ and R ≥ 13.8 km. © 2006 COSPAR.
dc.relation.ispartofseries Advances in Space Research
dc.subject Accretion
dc.subject Accretion disks
dc.subject Infall
dc.subject Neutron stars
dc.title Non-LTE models for neutron star atmospheres and supernova-fallback disks
dc.type Article
dc.relation.ispartofseries-issue 10
dc.relation.ispartofseries-volume 40
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 1512
dc.source.id SCOPUS02731177-2007-40-10-SID35248850722


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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