Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+
Jul 20, 20206 pages
Published in:
- Mon.Not.Roy.Astron.Soc. 498 (2020) 1, L98-L103
- Published: Oct 11, 2020
e-Print:
- 2007.09980 [astro-ph.HE]
DOI:
- 10.1093/mnrasl/slaa133 (publication)
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Abstract: (Oxford University Press)
We present a timing analysis of the transitional millisecond pulsar PSR J1023+0038 using observations taken between 2018 January and 2020 January with the high time resolution photon counter Aqueye+ mounted at the 1.82 m Copernicus telescope in Asiago. We report the first measurement of the timing solution and the frequency derivative of PSR J1023+0038 based entirely on optical data. The spin-down rate of the pulsar is (−2.53 ± 0.04) × 10^−15 Hz^2, which is ∼20 per cent slower than that measured from the X-ray observations taken in 2013–2016 and ∼5 per cent faster than that measured in the radio band during the rotation-powered state.Note:
- 6 pages, 4 figures, accepted for publication in Monthly Notices of the Royal Astronomical Society Letters
- accretion, accretion discs
- stars: neutron
- X-rays: binaries
References(29)
Figures(4)