n MNASSA : Monthly Notes of the Astronomical Society of South Africa - Optical scintillation observed from a “redback” millisecond pulsar

Volume 78 Number 7-8
  • ISSN : 0024-8266


Abstract: PSR J1723-2837, is a “redback” millisecond pulsar (MSP) with a nondegenerative low mass companion in a 14.8 hr orbit. The presented paper is a followed-up report on a long-term, time-series photometry campaign of the 15.5 magnitude companion to the pulsar. In a previous paper we showed that the star experiences episodes of sporadic stellar activity and is not tidally locked. In this paper the author reports on small (σ 5.8 mmag) scattered noise, superimposed on the companion’s light curve. These rapid fluctuations were observed during 2018 and predominantly coincided at superior conjunction when the pulsar was behind the companion. To the author’s knowledge, similar phenomena in optical have not been observed to date in other MSP systems.

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