The supernova remnant CTB 37B and its associated magnetar CXOU J171405.7-381031: evidence for a magnetar-driven remnant

TL;DR

This paper presents evidence that the supernova remnant CTB 37B is powered by a young magnetar, CXOU J171405.7-381031, suggesting a magnetar-driven remnant with a very young age of about 1000 years.

Contribution

It proposes a magnetar-driven model for the supernova remnant CTB 37B, linking the remnant's properties to the energy injection from a young magnetar.

Findings

The magnetar has a characteristic age of ~1000 years.

The remnant's size and distance estimates are inconsistent with standard models.

A magnetar-driven scenario better explains the remnant's young age.

Abstract

We discuss in this Letter the association of the candidate magnetar CXOU J171405.7-381031 with the supernova remnant CTB 37B. The recent detection of the period derivative of the object allowed an estimation of a young characteristic age of only $\sim 1000 yr$. This value is too small to be compatible even with the minimum radius of the remnant $\geq 10 pc$, the value corresponding to the {\it lower} limit of the estimated distance of $10.2 \pm 3.5 kpc$, unless the true distance happens to be even smaller than the lower limit. We argue that a consistent scenario for the remnant origin, in which the latter is powered by the energy injected by a young magnetar, is indeed more accurate to explain the young age, and points out to its non-standard (i.e. magnetar-driven) nature.