Distances to Two Galactic Supernova Remnants: G32.8-0.1 and G346.6-0.2

TL;DR

This paper confirms the farther distances of two Galactic supernova remnants, G32.8-0.1 and G346.6-0.2, by solving equations for their shell phases, refining previous kinematic estimates.

Contribution

It provides a method to determine the farther distances of SNRs by analyzing their shell phases, improving distance estimates for these remnants.

Findings

G32.8-0.1 is at 8.8 kpc, the farther distance.

G346.6-0.2 is at 11 kpc, the farther distance.

Confirmed the farther distances through phase analysis.

Abstract

There are either a near kinematic distance of 5.5 kpc or a far distance of 8.8 kpc for a Galactic supernova remnant (SNR) G32.8$-$0.1 derived by using the rotation curve of the Galaxy. Here we make sure that the remnant distance is the farther one 8.8 kpc through solving a group of equations for the shell-type remnants separately at the adiabatic-phase and the radiative-phase. For SNR G346.6$-$0.2 we determine its distance also the farther one 11 kpc rather than the nearer one 5.5 kpc.