Spin-down rate of the transitional millisecond pulsar PSR J1023+0038 in the optical band with Aqueye+. (24th July 2020)

• Record Type: Journal Article
• Authors: Burtovoi, Aleksandr; Zampieri, Luca; Fiori, Michele; Naletto, Giampiero; Spolon, Alessia; Barbieri, Cesare; Papitto, Alessandro; Ambrosino, Filippo
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 498:Number 1(2020)
• Page Start: L98
• Page End: L103
• Publication Date: 2020-07-24
• Subjects: accretion, accretion discs -- stars: neutron -- X-rays: binaries; Astronomy -- Research -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnrasl/slaa133
• Languages: English
• ISSNs: 1745-3933

Abstract

ABSTRACT: 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.