Kavli Affiliate: Renxin Xu
| First 5 Authors: Di Li, Mao Yuan, Lin Wu, Jingye Yan, Xuning Lv
| Summary:
Long-period radio transients (LPTs) are a newly discovered class of radio
emitters with yet incomprehensibly long rotation periods, ranging from minutes
to hours. The astrophysical nature of their isolated counterparts remains
undetermined. We report a new LPT, DART J1832-0911 (2656.23 $pm$ 0.15 s
period), the first evidence associating such objects to supernova remnants
(SNRs). Its dispersion measure distance aligns well with the distance of the
SNR, confirming its origin from a supernova explosion. The source displays
either phase-locked circularly polarized emission or nearly 100% linear
polarization in radio bands. No detectable optical counterpart was found, even
with a 10 m class telescope. The J1832-0911’s SNR association, stable, highly
polarized emission, and abnormally long period strongly favor its origin from a
young neutron star, whose spin has been braked, possibly by interaction with
supernova’s fallback materials. This discovery provides critical insights into
the nature of ultra-long period transients and their evolutionary link to
stellar remnants.
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