<i>Herschel</i>/HIFI observations of high-<i>J</i>CO transitions in the protoplanetary nebula CRL 618
<i>Herschel</i>/HIFI observations of high-<i>J</i>CO transitions in the protoplanetary nebula CRL 618
We performed Herschel/HIFI observations of several CO lines in the far-infrared/sub-mm in the protoplanetary nebula CRL618. The high spectral resolution provided by HIFI allows measurement of the line profiles. Since the dynamics and structure of the nebula is well known from mm-wave interferometric maps, it is possible to identify the …