Interstellar carbon monoxide in the direction of the SNR S 147.

Abstract

The paper examines interstellar carbon monoxide in the direction of the supernova remnant S147. The electronic bands in the fourth positive system of (C-12)(O-16) were detected in absorption in the ultraviolet spectrum of the Ble star HD 36665. The line of sight to this star is 1 deg away from the center of the supernova remnant S147 and the star lies behind the remnant. The equivalent widths of seven bands of a transition of (C-12)(O-16) were measured and a satisfactory fit to a curve of growth can be obtained for a velocity dispersion b = 5.5 plus or minus 0.5 km/sec; the bands of (C-13)(O-16) have also been detected in the spectrum of HD 36665.