4 Comparison of the ALMA and Herschel - ESO

Figure 8: A plot of the Herschel HIFI receiver bands (above the plot) and ALMA receiver bands 8, 9
and 10. The irregular curve below the bands is the transmission at the zenith, as obtained from the data
of Serabyn et al. (1998) for Mauna Kea.
With the inclusion of the contributions from Japan to ALMA, it will be possible to measure
the same spectral lines in ALMA Bands 8, 9 and 10 and Herschel HIFI Bands 1 and 2 (see
Fig. 8). In Table 7, we give a list of some of the spectral lines common to both instruments.
In addition, there are thousands of spectral lines of methanol, CH 3
OH, methyl cyanide,
CH 3
CN, sulphur monoxide, SO, and sulphur dioxide, SO 2
common to both instruments.
For each spectral line, we give the quantum numbers of the transitions and line frequencies.
We also give the atmospheric transmission for a 5 km high site with 0.5 mm of precipitable
water (this is scaled to 5 km elevation from http://www.submm.caltech.edu/cso/weather/
atplot.shtml).
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