Non-detection of pulsed radio emission from magnetar Swift J1834.9-0846: constraint on the fundamental plane of magnetar radio emission

TL;DR

This study observed the magnetar Swift J1834.9-0846 with a radio telescope and found no pulsed radio emission, challenging the existing fundamental plane model linking radio emission to spin-down luminosity.

Contribution

The paper provides observational constraints on the fundamental plane of magnetar radio emission, suggesting it may depend more on X-ray luminosity than spin-down luminosity.

Findings

No pulsed radio emission detected from Swift J1834.9-0846.

Upper limit on radio emission is 0.5 mJy.

Results challenge the fundamental plane model for magnetar radio emission.

Abstract

The magnetar Swift J1834.9-0846 is observed using Nanshan 25 meter radio telescope. No pulsed radio emission is detected. The upper limit on pulsed radio emission from this source is 0.5 mJy. According to the fundamental plane for radio magnetars, this source should have radio emission. Therefore, our results put constraints on the existence of a fundamental plane of magnetar radio emission. We argue that a magnetar's ability to emit radio emission may have little to do with the spin down luminosity and it is related to the magnetar X-ray luminosity. The only necessary condition is a relatively low X-ray luminosity.