Search for cyclotron absorptions from magnetars in the quiescence with XMM-Newton

TL;DR

This study analyzed XMM-Newton spectra of magnetar candidates during quiescence to detect cyclotron absorption features, but found no significant lines, suggesting potential smoothing mechanisms affecting the features.

Contribution

First detailed search for cyclotron absorption lines in quiescent magnetars using XMM-Newton data, reporting a null result.

Findings

No significant absorption lines detected

Possible smoothing mechanisms obscure features

Results constrain models of magnetar atmospheres

Abstract

In this work, we perform the detailed analysis of absorption features in spectra of magnetar candidates observed by XMM-Newton satellite. No significant line-like feature has been found. This negative result may indicate the possible presence of smoothing out the absorption features mechanisms.