Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-10-28
Astronomy and Astrophysics
Astrophysics
4 pages, to appear in the proceedings of the Bologna Conference on "X-ray Astronomy 1999: Stellar Endpoints, AGNs and the Diff
Scientific paper
10.1063/1.1434658
We present a follow-up X-ray and radio study of the field containing the 7-s X-ray pulsar AX J1845-0258, the serendipitous ASCA source whose characteristics are found to be similar to those of the anomalous X-ray pulsars (AXPs). Newly acquired ASCA data confirms a dramatic reduction in flux from the pulsar and reveals instead a faint X-ray point source, AX J184453.3-025642, within the pulsar's error circle. This X-ray source is surrounded by a partial shell of emission coincident with a newly discovered young shell-type radio supernova remnant, G29.6+0.1. The central X-ray source is too faint to provide a detection of the expected pulsations which might confirm AX J184453.3-025642 as the pulsar. We argue that this system is similar to that of RCW 103, another AXP-like object whose central source displays low/high flux states (but no pulsations). The alternative interpretation of a binary system, perhaps associated with a supernova remnant, is still possible. In either case, this result may have profound implication on the evolution of young neutron stars.
Gaensler Bryan M.
Gotthelf Eric Van
Torii Kazufumi
Vasisht Gautam
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