Long-period radio transient PSR J0901-4046 is not an Isolated White Dwarf Pulsar
Maxim Lyutikov, Mukremin Kilic, Alexander Wolszczan, Craig Heinke
Purdue University · University of Oklahoma · Pennsylvania State University · University of Alberta
astro-ph.HE
Submitted: 2026-07-04
License: http://creativecommons.org/licenses/by/4.0/
The gist: We report the Chandra non-detection of PSR J0901 - 4046, a P=75.89 seconds long-period radio transient (LPT).
Terminology
Abstract
We report the Chandra non-detection of PSR J0901 - 4046, a P=75.89 seconds long-period radio transient (LPT). For a distance of 467 pc, the upper limit on X-ray luminosity is L X at most few times 10 28 erg s-1. For the measured P and, this upper limit, approximately 50 times lower than the previous Swift observations, is comparable to the spin-down luminosity of a neutron star, but would be approximately four orders of magnitude smaller than the spindown power of a white dwarf. Our results disfavor isolated WDs as the central star in PSR J0901 - 4046. We suggest that the isolated LPTs are powered by magnetic dissipation (not rotation), in a way similar to magnetars' radio emission.
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