A light redback companion of PSR J1622-0315 and irradiation power in spider systems

2023/07/25 by Yap, Y. X. Jane, Kong, Albert, Li, Kwan Lok
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE)

paper · doi:10.48550/arxiv.2307.13482

Abstract

We report optical observations of the millisecond pulsar binary system PSR J1622-0315 with the Lulin 1m telescope in Taiwan and the Lijiang 2.4m telescope in China between 2019 and 2021. The companion of the pulsar, which is of V~19 mag, showed ellipsoidal-distorted orbital variations in its light curves. The best-fit model to the light curves, with the binary code PHOEBE, gives a companion mass of 0.122+/-0.006 M_sun. This places PSR J1622-0315 in the spider-system subclass. We compared the properties of PSR J1622-0315 with other spider pulsar binaries for the scalings between the spin-down luminosity derived for the pulsar, irradiation luminosity of the companion, and X-ray luminosity of the binary. We find that pulsar irradiation in PSR J1622-0315 is insignificant and the irradiation luminosity of the transitional millisecond pulsars PSR J1023+0038 and PSR J1227-4853 are the highest among the redback systems.

Related

• Discovery of the redback millisecond pulsar PSR J1728-4608 with ASKAP
• Mass estimates from optical modelling of the new TRAPUM redback PSR J1910-5320
• The GMRT High-Resolution Southern Sky Survey for pulsars and transients -- VII: Timing of Spider MSP J1242-4712, A Bridge Between Redback and Black Widow Pulsars
• The slowest spinning Galactic-field spider PSR J1932+2121: A history of inefficient mass transfer
• Multiwavelength observations of a new black-widow millisecond pulsar PSR J1544-2555