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 |
|