CO Clouds around SNR G21.8-0.6 and G32.8-0.1

Abstract

We made the first CO(1–0) mapping to SNR G21.8–0.6 and SNR G32.8–0.1, both associated with OH 1720 MHz maser. Based on the morphological correspondence and velocity and position agreement between the radio remnant and the CO clouds, we tentatively identify the clouds that are respectively interacting with the two SNRs.