UPA Perpustakaan Universitas Jember

Diagnostics of the Early Explosion Phase of a Classical Nova Using Its X-ray Emission: A Model for the X-ray Outburst of CI Camelopardalis in 1998

FILIPPOVA, E. V. - Personal Name
REVNIVTSEV M. G. - Personal Name
LUTOVINOV, A. A. - Personal Name

We have computed a spherically symmetric model for the interaction of matter ejected during
the outburst of a classical nova with the stellar wind from its optical component. This model is used
to describe the intense X-ray outburst (the peak 3–20 keV flux was ∼2 Crab) of the binary system
CI Camelopardalis in 1998. According to our model, the stellar wind from the optical component heated by
a strong shock wave produced when matter is ejected from the white dwarf as the result of a thermonuclear
explosion on its surface is the emission source in the standard X-ray band. Comparison of the calculated
and observed time dependences of the mean radiation temperature and luminosity of the binary system
during its outburst has yielded very important characteristics of the explosion. We have been able to
measure the velocity of the ejected matter immediately after the onset of the explosion for the first time:
it follows from our model that the ejected matter had a velocity of ∼2700 km s −1 even on 0.1–0.5 day after
the outburst onset and it flew with such a velocity for the first 1–1.5 day under an external force, possibly,
the radiation pressure from the white dwarf. Subsequently, the matter probably became transparent and
began to decelerate. The time dependence of the mean radiation temperature at late expansion phases has
allowed us to estimate the mass of the ejected matter, ∼10 −7 –10 −6 M . The mass loss rate in the stellar
wind required to explain the observed peak luminosity of the binary system during its outburst has been
estimated to be Ṁ ∼ (1 − 2) × 10 −6 M yr −1 .

EB00000003794K Available

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classical novae
X-ray emission
numerical calculations

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E. V. Filippova, M. G. Revnivtsev, A. A. Lutovinov 1

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Diagnostics of the Early Explosion Phase of a Classical Nova Using Its X-ray Emission: A Model for the X-ray Outburst of CI Camelopardalis in 1998

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NPP. 3509212D1000001

Diagnostics of the Early Explosion Phase of a Classical Nova Using Its X-ray Emission: A Model for the X-ray Outburst of CI Camelopardalis in 1998

FILIPPOVA, E. V. - Personal NameREVNIVTSEV M. G. - Personal NameLUTOVINOV, A. A. - Personal Name

Series Title

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Publisher

Collation

Language

ISBN/ISSN

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Content Type

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Carrier Type

Edition

Subject(s)

Specific Detail Info

Statement of Responsibility

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FILIPPOVA, E. V. - Personal Name
REVNIVTSEV M. G. - Personal Name
LUTOVINOV, A. A. - Personal Name