PSR J0636+5128: A Heated Companion in a Tight Orbit
Paul Draghis, Roger W. Romani
TL;DR
This paper analyzes imaging data of the binary pulsar PSR J0636+5128, revealing a heated companion star and providing insights into the system's geometry, distance, and emission characteristics.
Contribution
It offers the first detailed imaging analysis of the heated companion in PSR J0636+5128, constraining system parameters and explaining observational features.
Findings
Heated companion detected in multiple wavelengths
Inclination angle estimated to be less than 40 degrees
System distance revised to over 700 parsecs
Abstract
We present an analysis of archival Gemini g', r', K and Keck H, K_s imaging of this nearby short period binary (P_B=95.8min) 2.87ms pulsar. The heated companion is clearly detected. Direct pulsar heating provides an acceptable model at the revised >700pc parallax distance. The relatively shallow light curve modulation prefers an inclination i<40deg; this high latitude view provides a likely explanation for the lack of radio signatures of wind dispersion or eclipse. It also explains the low minimum companion mass and, possibly, the faintness of the source in X- and gamma-rays.
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