A Magnetar-Asteroid Impact Model for FRB 200428 Associated with an X-ray Burst from SGR 1935+2154

Abstract

Very recently, an extremely bright fast radio burst (FRB) 200428 with two sub-millisecond pulses was discovered to come from the direction of the Galactic magnetar SGR 1935+2154, and an X-ray burst (XRB) counterpart was detected simultaneously. These observations favor magnetar-based interior-driven models. In this Letter, we propose a different model for FRB 200428 associated with an XRB from SGR 1935+2154, in which a magnetar with high proper velocity encounters an asteroid of mass $\sim 10^{20}$g. This infalling asteroid in the stellar gravitational field is first possibly disrupted tidally into a great number of fragments at radius $\sim \mathrm{a}\mathrm{few}$ times $10^{10}$cm, and then slowed around the Alfv$\acute{\mathrm{e}}$n radius by an ultra-strong magnetic field and in the meantime two major fragments of mass $\sim 10^{17}$g that cross magnetic field lines produce two pulses of FRB 200428. The whole asteroid is eventually accreted onto the poles along magnetic field lines, impacting the stellar surface, creating a photon-e${}^{\pm }$ pair fireball trapped initially in the stellar magnetosphere, and further leading to an XRB. We show that this gravitationally-powered model can interpret all of the observed features self-consistently.

8 pages, 2 figures, a few references added, accepted for publication in ApJ Letters

References in corpus (6)

• A bright millisecond radio burst of extragalactic origin
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• Fast Radio Bursts
• Possible periodic activity in the repeating FRB 121102
• Radio continuum and polarization study of SNR G57.2+0.8 associated with magnetar SGR1935+2154
• Periodic Fast Radio Bursts as a Probe of Extragalactic Asteroid Belts

Cited by in corpus (31)

• The Physical Mechanisms of Fast Radio Bursts
• The Physics of Fast Radio Bursts
• The Physics of Fast Radio Bursts
• Pair separation in parallel electric field in magnetar magnetosphere and narrow spectra of fast radio bursts
• Quasi-periodic oscillations of the X-ray burst from the magnetar SGR J1935+2154 and associated with the fast radio burst FRB 200428
• Periodic Activities of Repeating Fast Radio Bursts from Be/X-ray Binary Systems
• FRB 200428: an Impact between an Asteroid and a Magnetar
• The arrival time and energy of FRBs traverse the time-energy bivariate space like a Brownian motion
• Periodic repeating fast radio bursts: interaction between a magnetized neutron star and its planet in an eccentric orbit
• Long and Short Fast Radio Bursts are Different from Repeating and Non-repeating Transients
• Reanalysis of the X-ray burst associated FRB 200428 with Insight-HXMT observations
• Discovery of the linear energy-dependence of the spectral lag of X-ray bursts from SGR J1935+2154
• Double-peaked Pulse Profile of FRB 200428: Synchrotron Maser Emission from Magnetized Shocks Encountering a Density Jump
• Repeating Fast Radio Bursts with High Burst Rates by Plate Collisions in Neutron Star Crusts
• 81 New Candidate Fast Radio Bursts in Parkes Archive
• Periodic activity from fast radio burst FRB180916 explained in the frameof the orbiting asteroid model
• Constraining mechanism associated with fast radio burst and glitch from SGR J1935
• Bursts before Burst: A Comparative Study on FRB 200428-associated and FRB-absent X-ray Bursts from SGR J1935+2154
• Dynamics of the clumps partially disrupted from a planet around a neutron star
• An Intermediate-field Fast Radio Burst Model and the Quasi-periodic Oscillation
• Tidal capture of an asteroid by a magnetar: FRB-like bursts, glitch and anti-glitch
• Comparison of Burst Properties between FRB 20190520B and FRB 20121102A
• Earth-mass primordial black hole mergers as sources for non-repeating FRBs
• Unveil A Peculiar Light Curve Pattern of Magnetar Burst with GECAM observations of SGR J1935+2154
• Repeating Fast Radio Bursts from Pulsar-Asteroid Belt Collisions: Frequency Drifting and Polarization
• Repeating X-ray bursts: Interaction between a neutron star and clumps partially disrupted from a planet
• Periodic Activities of Fast Radio Burst Repeaters from Precessing Magnetars with Evolving Obliquity
• Geometrical envelopes of fast radio bursts
• AT2020hur: A Possible Optical Counterpart of FRB 180916B
• Do the periodic activities of repeating fast radio bursts represent the spins of neutron stars?
• Fast radio bursts, magnetars and earthquakes: their "family feud"?