CO J=2-1 observations toward the OH 1720 MHz maser in Kes 69

REYNOSO, ESTELA M.; MANGUM, J. G.

"Cosmic masers: from protostars to black holes", IAU Symposium 206

Año: 2002; p. 221 - 224

We present CO J=2-1 observations made with the 12 Meter Telescope of NRAO using the On-The-Fly technique, towards the OH 1720 MHz maser detected in direction to the supernova remnant (SNR) Kes 69. OH 1720 MHz masers associated to SNRs are strong evidence of shockes molecular gas, and are proposed to be tracers of SNRs kinematical distances. In our images, the most conspicuous feature positionally coincident with the maser is a cloud at ~+41 km/s. The difference between the velocity of the OH 1720 MHz maser and this cloud is ~30 km/s. At the systemic velocity of the OH 1720 MHz maser, we detected a weak, small clump with the maser lying at its edge, in agreement with previous findings in other SNRs. We suggest that this small clump has been shocked by the expanding SNR, and the ~+41 km/s component probably corresponds to gas accelerated by the shock front. We do not discard, however, that the ~+41 km/s component be just a quiescent, foregroud cloud unrelated to Kes 69.