Aims.We present a new optical observation of the X-ray dim isolated neutron star RX J1605.3+3249, performed in 2005 with the Wide Field Channel (WFC) of the Advanced Camera for Surveys (ACS) on board Hubble Space Telescope, aimed at measuring the neutron star proper motion. Methods: .We have compared the target position with the one measured in a previous HST image of the field obtained in 2001. Results: .We infer a proper motion of μ = 155.0 ± 3.1 mas/yr, corresponding to a star velocity VT ˜ 73 km s-1 at 100 pc distance. Our measurement refines the result recently reported by Motch et al. (2005, A&A, 429, 257), and confirms the optical source as the counterpart of the neutron star.
The Proper Motion of the Isolated Neutron Star RX J1605.3-3249
TUROLLA, ROBERTO
2006
Abstract
Aims.We present a new optical observation of the X-ray dim isolated neutron star RX J1605.3+3249, performed in 2005 with the Wide Field Channel (WFC) of the Advanced Camera for Surveys (ACS) on board Hubble Space Telescope, aimed at measuring the neutron star proper motion. Methods: .We have compared the target position with the one measured in a previous HST image of the field obtained in 2001. Results: .We infer a proper motion of μ = 155.0 ± 3.1 mas/yr, corresponding to a star velocity VT ˜ 73 km s-1 at 100 pc distance. Our measurement refines the result recently reported by Motch et al. (2005, A&A, 429, 257), and confirms the optical source as the counterpart of the neutron star.Pubblicazioni consigliate
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