Orbital and Precession Periods in Repeating FRB 20121102A
J. I. Katz
arXiv:2405.03721v1 Announce Type: new
Abstract: Li {it et al./} (2024) reported a 4.605 day period in the repeating FRB 20121102A in addition to the previously reported 157 day modulation of its activity. This note suggests that the shorter period is the orbital period of a mass-transferring star orbiting a black hole, possibly of intermediate mass, and that the 157 day period is the precession period of an accretion disc around the black hole. The mass-losing star must be evolved.arXiv:2405.03721v1 Announce Type: new
Abstract: Li {it et al./} (2024) reported a 4.605 day period in the repeating FRB 20121102A in addition to the previously reported 157 day modulation of its activity. This note suggests that the shorter period is the orbital period of a mass-transferring star orbiting a black hole, possibly of intermediate mass, and that the 157 day period is the precession period of an accretion disc around the black hole. The mass-losing star must be evolved.

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