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Reconciling the 16.35-day Period of FRB 20180916B with Jet Precession
- Source :
- The Astrophysical Journal. 921:147
- Publication Year :
- 2021
- Publisher :
- American Astronomical Society, 2021.
-
Abstract
- A repeating fast radio burst (FRB), FRB 20180916B (hereafter FRB 180916), was reported to have a 16.35-day period. This period might be related to a precession period. In this paper, we investigate two precession models to explain the periodic activity of FRB 180916. In both models, the radio emission of FRB 180916 is produced by a precessing jet. For the first disk-driven jet precession model, an extremely low viscous parameter (i.e., the dimensionless viscosity parameter $\alpha \lesssim 10^{-8}$) is required to explain the precession of FRB 180916, which implies its implausibility. For the second tidal force-driven jet precession model, we consider a compact binary consists of a neutron star/black hole and a white dwarf; the white dwarf fills its Roche lobe and mass transfer occurs. Due to the misalignment between the disk and orbital plane, the tidal force of the white dwarf can drive jet precession. We show that the relevant precession periods are several days to hundreds of days, depending on the specific accretion rates and component masses. The duration of FRB 180916 generation in the binary with extremely high accretion rate will be several thousand years.<br />Comment: 12 pages, 4 figures, accepted for publication in ApJ
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
Jet (fluid)
Accretion (meteorology)
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
White dwarf
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Black hole
Neutron star
Space and Planetary Science
Tidal force
Precession
Astrophysics::Solar and Stellar Astrophysics
Roche lobe
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - High Energy Astrophysical Phenomena
Astrophysics::Galaxy Astrophysics
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 921
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....21c64716c77b32bed42172ab4c646df0