HST Proper Motion confirms the optical identification of the nearby pulsar PSR 1929+10

Details HST Proper Motion confirms the optical identification of the nearby pulsar PSR 1929+10 HST Proper Motion confirms the optical identification of the nearby pulsar PSR 1929+10

2002-08-28

arxiv.org/abs/astro-ph/0208491v1

Astrophys.J. 580 (2002) L147-L150

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures, submitted to ApJ Letters

Scientific paper

10.1086/345291

We report on the proper motion measurement of the proposed optical counterpart of the X-ray/radio pulsar PSR 1929+10. Using images obtained with the HST/STIS (average epoch 2001.73) we computed a yearly displacement of +97 +/- 1 mas yr^{-1} in RA and +46 +/- 1 mas yr^{-1} in Dec since the epoch (1994.52) of the original HST/FOC detection. Both the magnitude and direction of the optical proper motion components are found to be fully consistent with the most recent VLBA radio measurements. This result provides an unambiguous confirmation of the pulsar optical identification. In addition, we have used the combined STIS/FOC datasets to derive information on the pulsar spectrum, which seems characterized by a power law component, apparently unrelated to the X-ray emission.

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