Spectral evolution of an X-ray burst from MXB 1728-34 and constraints on burster parameters

A. D. Kaminker; G. G. Pavlov; Yu A. Shibanov; V. G. Kurt; A. S. Smirnov; V. M. Shamolin; I. F. Kopaeva; E. K. Sheffer

doi:10.1016/0273-1177(88)90444-9

Spectral evolution of an X-ray burst from MXB 1728-34 and constraints on burster parameters

A. D. Kaminker, G. G. Pavlov, Yu A. Shibanov, V. G. Kurt, A. S. Smirnov, V. M. Shamolin, I. F. Kopaeva, E. K. Sheffer

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Abstract

Spectral evolution is investigated and interpretation of the spectra are considered for a burst from the X-ray burster MXB 1728-34 detected by ASTRON. Interpretation of the spectra around the burst maximum in terms of radiation from an isothermal neutron star (NS) photosphere with dominating role of the Thomson scattering allows one to obtain reasonable constraints on NS mass M, radius R and distance D to the burster. In particular, M=(1.4-2)M_⊗, R=(6.5-12) km for D=6 kpc and helium photosphere. This interpretation leads to a conclusion that the photosphere expands up to several tens of kilometers in the burst maximum. The luminosity remains close to the Eddington limit during expansion and contraction, maxima of the observed flux corresponding to minima of the luminosity due to general relativity effects.

Original language	English (US)
Pages (from-to)	477-480
Number of pages	4
Journal	Advances in Space Research
Volume	8
Issue number	2-3
DOIs	https://doi.org/10.1016/0273-1177(88)90444-9
State	Published - 1988

All Science Journal Classification (ASJC) codes

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
General Earth and Planetary Sciences

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10.1016/0273-1177(88)90444-9

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@article{89f57501d97145318c6d3991cf4525e7,

title = "Spectral evolution of an X-ray burst from MXB 1728-34 and constraints on burster parameters",

abstract = "Spectral evolution is investigated and interpretation of the spectra are considered for a burst from the X-ray burster MXB 1728-34 detected by ASTRON. Interpretation of the spectra around the burst maximum in terms of radiation from an isothermal neutron star (NS) photosphere with dominating role of the Thomson scattering allows one to obtain reasonable constraints on NS mass M, radius R and distance D to the burster. In particular, M=(1.4-2)M⊗, R=(6.5-12) km for D=6 kpc and helium photosphere. This interpretation leads to a conclusion that the photosphere expands up to several tens of kilometers in the burst maximum. The luminosity remains close to the Eddington limit during expansion and contraction, maxima of the observed flux corresponding to minima of the luminosity due to general relativity effects.",

author = "Kaminker, {A. D.} and Pavlov, {G. G.} and Shibanov, {Yu A.} and Kurt, {V. G.} and Smirnov, {A. S.} and Shamolin, {V. M.} and Kopaeva, {I. F.} and Sheffer, {E. K.}",

year = "1988",

doi = "10.1016/0273-1177(88)90444-9",

language = "English (US)",

volume = "8",

pages = "477--480",

journal = "Advances in Space Research",

issn = "0273-1177",

publisher = "Elsevier Ltd",

number = "2-3",

}

TY - JOUR

T1 - Spectral evolution of an X-ray burst from MXB 1728-34 and constraints on burster parameters

AU - Kaminker, A. D.

AU - Pavlov, G. G.

AU - Shibanov, Yu A.

AU - Kurt, V. G.

AU - Smirnov, A. S.

AU - Shamolin, V. M.

AU - Kopaeva, I. F.

AU - Sheffer, E. K.

PY - 1988

Y1 - 1988

N2 - Spectral evolution is investigated and interpretation of the spectra are considered for a burst from the X-ray burster MXB 1728-34 detected by ASTRON. Interpretation of the spectra around the burst maximum in terms of radiation from an isothermal neutron star (NS) photosphere with dominating role of the Thomson scattering allows one to obtain reasonable constraints on NS mass M, radius R and distance D to the burster. In particular, M=(1.4-2)M⊗, R=(6.5-12) km for D=6 kpc and helium photosphere. This interpretation leads to a conclusion that the photosphere expands up to several tens of kilometers in the burst maximum. The luminosity remains close to the Eddington limit during expansion and contraction, maxima of the observed flux corresponding to minima of the luminosity due to general relativity effects.

AB - Spectral evolution is investigated and interpretation of the spectra are considered for a burst from the X-ray burster MXB 1728-34 detected by ASTRON. Interpretation of the spectra around the burst maximum in terms of radiation from an isothermal neutron star (NS) photosphere with dominating role of the Thomson scattering allows one to obtain reasonable constraints on NS mass M, radius R and distance D to the burster. In particular, M=(1.4-2)M⊗, R=(6.5-12) km for D=6 kpc and helium photosphere. This interpretation leads to a conclusion that the photosphere expands up to several tens of kilometers in the burst maximum. The luminosity remains close to the Eddington limit during expansion and contraction, maxima of the observed flux corresponding to minima of the luminosity due to general relativity effects.

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JO - Advances in Space Research

JF - Advances in Space Research

IS - 2-3

ER -

Spectral evolution of an X-ray burst from MXB 1728-34 and constraints on burster parameters

Abstract

All Science Journal Classification (ASJC) codes

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