| Issue |
A&A
Volume 386, Number 3, May II 2002
|
|
|---|---|---|
| Page(s) | 1001 - 1008 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20020332 | |
| Published online | 15 May 2002 | |
Thermal emission from low-field neutron stars
1
Universitäts-Sternwarte Göttingen, Geismarlandstr. 11, 37083 Göttingen, Germany
2
Physics Department, Stanford University, Stanford, CA 94305-4060, USA
Corresponding author: B. T. Gänsicke, boris@uni-sw.gwdg.de
Received:
23
July
2001
Accepted:
25
February
2002
We present a new grid of LTE model atmospheres for weakly
magnetic (
G) neutron stars, using opacity and equation
of state data from the OPAL project and employing a fully frequency-
and angle-dependent radiation transfer. We discuss the differences
from earlier models, including a comparison with a detailed NLTE
calculation.
We suggest heating of the outer layers of the neutron star
atmosphere as an explanation for the featureless X-ray spectra of
RX J1856.5–3754 and RX J0720.4–3125 recently observed with
Chandra and XMM.
Key words: stars: neutron / stars: atmospheres / radiative transfer / radiation mechanisms: thermal
© ESO, 2002
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