REVIEW 5 cited by
Magnetospheric interaction in white dwarf binaries AR Sco and AE Aqr
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
abstract
We develop a model of the white dwarf (WD) - red dwarf (RD) binaries AR Sco and AE Aqr as systems in a transient propeller stage of highly asynchronous intermediate polars. The WDs are relatively weakly magnetized with magnetic field of $\sim 10^6$ G. We explain the salient observed features of the systems due to the magnetospheric interaction of two stars. Currently, the WD's spin-down is determined by the mass loading of the WD's magnetosphere from the RD's at a mild rate of $\dot{M}_{WD} \sim 10^{-11} M_\odot $/yr. Typical loading distance is determined by the ionization of the RD's wind by the WD's UV flux. The WD was previously spun up by a period of high accretion rate from the RD via Roch lobe overflow with $\dot{M} \sim 10^{-9} M_\odot $/yr, acting for as short a period as tens of thousands of years. The non-thermal X-ray and optical synchrotron emitting particles originate in reconnection events in the magnetosphere of the WD due to the interaction with the flow from the RD. In the case of AR Sco, the reconnection events produce signals at the WD's rotation and beat periods - this modulation is due to the changing relative orientation of the companions' magnetic moments and resulting variable reconnection conditions. Radio emission is produced in the magnetosphere of the RD, we hypothesize, in a way that it is physically similar to the Io-induced Jovian decametric radiation.
Forward citations
Cited by 5 Pith papers
-
Sensitive Constraints on Coherent Radio Emission from Five Isolated White Dwarfs
Sensitive searches of five isolated magnetic white dwarfs with FAST, GBT, and ATCA yield no radio emission, imposing the strongest constraints so far on isolated WD pulsars.
-
Relativistic van Allen belts in magnetospheres of pulsars and white dwarfs
Relativistic particles trapped in a star's dipole magnetosphere with synchrotron losses fall into three classes (oscillating, freezing, precipitating), producing distinctive optical and X-ray emission maps.
-
A Sibling of AR Scorpii: SDSS J230641.47$+$244055.8 and the Observational Blueprint of White Dwarf Pulsars
SDSS J230641.47+244055.8 is a newly identified white dwarf pulsar with a 92-second spin period and a 3.49-hour orbit, making it the third known member of this rare class.
-
Modelling the multi-wavelength emission and polarisation signatures of the novel white-dwarf pulsar system AR Sco
A new particle-dynamics emission code reproduces AR Sco's spectral energy distribution in a magnetic mirror model, constraining the white dwarf magnetic field to roughly 250-300 MG.
-
The Decline and Fall of ROME. V. A Preliminary Search for Star-Disrupted Planet Interactions and Coronal Activity at 5 GHz Among White Dwarfs within 25 pc
A ~5 GHz Arecibo survey of nine isolated white dwarfs within 25 pc found no polarized radio bursts, placing new upper limits on star-planet magnetic interactions and coronal flares.
Discussion (0). Continue with ORCID to comment.