  We test a method of estimating the power spectrum of turbulence in molecular
clouds based on the comparison of power spectra of integrated intensity maps
and single-velocity-channel maps, suggested by Lazarian and Pogosyan. We use
synthetic 13CO data from non-LTE radiative transfer calculations based on
density and velocity fields of a simulation of supersonic hydrodynamic
turbulence. We find that the method yields the correct power spectrum with good
accuracy. We then apply the method to the Five College Radio Astronomy
Observatory 13CO map of the Perseus region, from the COMPLETE website. We find
a power law power spectrum with slope beta=1.81+-0.10. The values of beta as a
function of velocity resolution are also confirmed using the lower resolution
map of the same region obtained with the AT&T Bell Laboratories antenna.
Because of its small uncertainty, this result provides a useful constraint for
numerical codes used to simulate molecular cloud turbulence.

Astrophysics