The Neutron Star Born in the Antlia Supernova Remnant

TL;DR

This study investigates the potential origin of the neutron star PSR J0630-2834 in the Antlia supernova remnant, identifying a possible former companion star and estimating the remnant's age and distance.

Contribution

The paper presents evidence linking PSR J0630-2834 to the Antlia SNR and identifies HIP 47155 as a potential former companion, providing new insights into supernova progenitors.

Findings

PSR J0630-2834 likely originated from the Antlia SNR

HIP 47155 may have been ejected as a companion star

Antlia SNR is approximately 1.2 million years old

Abstract

Among all known young nearby neutron stars, we search for the neutron star that was born in the same supernova event that formed the Antlia supernova remnant (SNR). We also look for a runaway star that could have been the former companion to the neutron star (if it exists) and then got ejected due to the same supernova. We find the pulsar PSR J0630-2834 to be the best candidate for a common origin with the Antlia SNR. In that scenario the SNR is ~1.2 Myr old and is presently located at a distance of ~138 pc. We consider the runaway star HIP 47155 a former companion candidate to PSR J0630-2834. The encounter time and place is consistent with both stars being ejected from the Antlia SNR. We measured the radial velocity of HIP 47155 as 32.42 +/- 0.70km/s.