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Periodically repeating fast radio bursts: Lense–Thirring precession of a debris disk?
- Source :
-
Publications of the Astronomical Society of Japan . Aug2020, Vol. 72 Issue 4, p1-6. 6p. - Publication Year :
- 2020
-
Abstract
- Recently, repeating fast radio bursts (FRBs) with a period of P FRB = 16.35 ± 0.18 d from FRB 180916.J0158+65 were reported. It still remains controversial how such a periodicity might arise for this FRB. In this Letter, based on an assumption of a young pulsar surrounding by a debris disk, we attempt to diagnose whether Lense–Thirring precession of the disk on the emitter can produce the observed periodicity. Our calculations indicate that the Lense–Thirring effect of a tilted disk can result in a precession period of 16 d for a mass inflow rate of 0.5–1.5 × 1018 g s−1, a pulsar spin period of 1–20 ms, and an extremely low viscous parameter α = 10−8 in the disk. The disk mass and the magnetic field of the pulsar are also constrained to be ∼10−3 M ⊙ and <2.5 × 1013 G. In our model, a new-born pulsar with normal magnetic field and millisecond period would successively experience the accretion and propeller phases, and is visible as a strong radio source in the current stage. The rotational energy of such a young neutron star can provide the observed radio bursting luminosity for 400 yr. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00046264
- Volume :
- 72
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Publications of the Astronomical Society of Japan
- Publication Type :
- Academic Journal
- Accession number :
- 145142195
- Full Text :
- https://doi.org/10.1093/pasj/psaa060