摘要
We present X-ray observations of pulsar wind nebula (PWN) G16.73+0.08/supernova remnant (SNR) G16.7+0.1 using archival data of Chandra ACIS. The X-ray emission peak location of this PWN is found to be offset by 24 arcsec from the centre of the 1.4-GHz emission of this nebula. The X-ray nebula is elongated in the direction from the X-ray peak to the 1.4-GHz emission centre. This offset suggests that G16.73+0.08 is an evolved PWNinteractingwith the SNR reverse shock. We identify a point source, CXOJ182058.16-142001.5, near the location of the X-ray peak. The spectrum of the X-ray nebula can be described by an absorbed power law of photon index 0.98+ -0.71 0.79 and hydrogen column density N H = 4.99 -2.28 +2.75 × 10 22 cm -2 . CXO J182058.16-142001.5 is likely a pulsar. We estimate its spin-down power to be about 2.6 × 10 36 erg s -1 . Assuming its age at 3000 and 10 000 yr, its dipole magnetic field strength at the polar surface is estimated to be about 4.2 × 10 13 and 1.3 × 10 13 G, respectively.