摘要：We present our study of the central point source CXOU J181852.0−150213 in the young Galactic supernova
remnant (SNR) G15.9+0.2 based on the recent ~90 ks Chandra observations. The point source
was discovered in 2005 in shorter Chandra observations and was
hypothesized to be a neutron star associated with the SNR. Our X-ray spectral analysis
strongly supports the hypothesis of a thermally emitting neutron star associated with
G15.9+0.2. We conclude that the object belongs to the class of young cooling
low-magnetized neutron stars referred to as central compact objects (CCOs). We modeled the
spectrum of the neutron star with a blackbody spectral function and with our hydrogen and
carbon neutron star atmosphere models, assuming that the radiation is uniformly emitted by
the entire stellar surface. Under this assumption, only the carbon atmosphere models yield
a distance that is compatible with a source located in the Galaxy. In this respect,
CXOU J181852.0−150213 is
similar to two other well-studied CCOs, the neutron stars in Cas A and in
HESS J1731−347, for which
carbon atmosphere models were used to reconcile their emission with the known or estimated
distances.
