Kavli Affiliate: Kiyoshi W. Masui
| First 5 Authors: Fengqiu Adam Dong, Fengqiu Adam Dong, , ,
| Summary:
We present the discovery of a 421 s long period radio transient (LPT) using
the CHIME telescope, CHIME J0630+25. The source is localized to
RA=06:30:38.4$pm1’$ Dec=25:26:24$pm1’$ using voltage data acquired with the
CHIME baseband system. A timing analysis shows that a model including a glitch
is preferred over a non-glitch model with $dF/F=1.3times10^-6$, consistent
with other glitching neutron stars. The timing model suggests a surface
magnetic field of $sim1.5times10^15$ G and a characteristic age of
$sim1.28times10^6$ yrs. A separate line of evidence to support a strong
local magnetic field is an abnormally high rotation measure of $RM=-347.8(6)
mathrmrad, m^-2$ relative to CHIME J0630+25’s modest dispersion measure
of 22(1) pc cm$^-2$, implying a dense local magneto-ionic structure. As a
result, we believe that CHIME J0630+25 is a magnetized, slowly spinning,
isolated neutron star. This marks CHIME J0630+25 as the longest period neutron
star and the second long period neutron star with an inferred magnetar-like
field. Based on dispersion measure models and comparison with pulsars with
distance measurements, CHIME J0630+25 is located at a nearby distance of
170$^+310_-100$ pc (95.4%), making it an ideal candidate for follow-up
studies.
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