Physical properties of the AXP 4U 0142+61 from X-ray spectral analysis

Tolga Güver, Feryal Ozel, Ersin Göǧüş

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We analyze archival Chandra and XMM-Newton data of 4U 0142+61 within the context of the surface thermal emission and magnetospheric scattering model. We show that the 4U 0142+61 spectrum can be fit very well with this physical model that contains only four parameters. The system parameters can be tightly constrained from the fits, yielding a surface magnetic field strength of B = (4.75 ± 0.02) × 1014 G, a surface temperature of kT = 0.309 ± 0.001 keV, and a scattering optical depth of a few in the magneto sphere. These values do not vary between observations due to the stability of the source within the window of the observations. The detailed fits yield χ2 values that are statistically much better than the traditionally employed blackbody+power-law and two blackbody fits. The spectroscopically measured surface magnetic field strength is higher than, but within, the theoretical uncertainties of the value inferred from the dipole spin-down formula.

Original languageEnglish (US)
Pages (from-to)1499-1504
Number of pages6
JournalAstrophysical Journal
Volume675
Issue number2
DOIs
StatePublished - Mar 10 2008

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spectral analysis
spectrum analysis
physical property
physical properties
field strength
scattering
magnetic field
x rays
thermal emission
XMM-Newton telescope
magnetic fields
optical thickness
newton
optical depth
surface temperature
power law
dipoles
parameter

Keywords

  • Stars: neutron
  • X-rays: stars

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Physical properties of the AXP 4U 0142+61 from X-ray spectral analysis. / Güver, Tolga; Ozel, Feryal; Göǧüş, Ersin.

In: Astrophysical Journal, Vol. 675, No. 2, 10.03.2008, p. 1499-1504.

Research output: Contribution to journalArticle

Güver, Tolga ; Ozel, Feryal ; Göǧüş, Ersin. / Physical properties of the AXP 4U 0142+61 from X-ray spectral analysis. In: Astrophysical Journal. 2008 ; Vol. 675, No. 2. pp. 1499-1504.
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