Issue |
A&A
Volume 379, Number 2, November IV 2001
|
|
---|---|---|
Page(s) | L35 - L38 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20011304 | |
Published online | 15 November 2001 |
The Chandra LETGS high resolution X-ray spectrum of the isolated neutron star RX J1856.5-3754
1
Max-Planck-Institut für extraterrestrische Physik, PO Box 1312, 85741 Garching, Germany
2
Space Research Organization of the Netherlands, Soorbonnelaan 2, 3584 CA Utrecht, The Netherlands
Corresponding author: V. Burwitz, burwitz@mpe.mpg.de
Received:
1
August
2001
Accepted:
18
September
2001
We present the Chandra LETGS X-ray spectrum of the
nearby ( pc) neutron star RXJ1856.5-3754.
Detailed spectral analysis of the combined X-ray and
optical data rules out the nonmagnetic neutron star
atmosphere models with
hydrogen, helium, iron and solar
compositions.
We
also conclude
that strongly magnetized atmosphere models
are unable to
represent the data.
The data can be explained with a two-component blackbody
model.
The harder component with temperature of
eV and a radius
km of the emitting region
well fits the X-ray data and can be interpreted as
radiation from a hot region on the
star's
surface.
Key words: stars: atmospheres / stars: individual: RX J1856.5-3754 / stars: neutron / X-rays: stars
© ESO, 2001
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