Emission Variation of a Long-period Pulsar Discovered by the Five-hundred-meter Aperture Spherical Radio Telescope (FAST)
May 3, 202210 pages
Published in:
- Astrophys.J. 929 2, 171
e-Print:
- 2205.01407 [hep-th]
DOI:
- 10.3847/1538-4357/ac5f42 (publication)
Experiments:
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Abstract: (IOP)
We report on the variation in the single-pulse emission from PSR J1900+4221 (CRAFTS 19C10) observed at
frequency centered at 1.25 GHz using the Five-hundred-meter Aperture Spherical radio Telescope. The integrated
pulse profile shows two distinct components, referred to here as the leading and trailing components, with the
latter component also containing a third weak component. The single-pulse sequence reveals different emissions
demonstrating as nulling, regular, and bright pulses, each with a particular abundance and duration distribution.
There also exists pulses that follow a log-normal distribution suggesting the possibility of another emission, in
which the pulsar is radiating weakly. Changes in the profile shape are seen across different emissions. We
examine the emission variations in the leading and trailing components collectively and separately, and find
moderate correlation between the two components. The inclination angle is estimated to be about 7° based on
pulse-width, and we discuss that nulling in this pulsar does not seem to show correlation with age and rotation
period.- beam: width
- pulsar
- correlation
- rotation
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