[PCG24-P01] Nitrogen isotopic fractionation on Titan atmosphere: An analysis of ALMA archive data
Keywords:Titan atmosphere, ALMA, isotopic fractionation
Titan has been used as one of calibrator sources of ALMA observations, and therefore, not a few (> 900) data are stored in the ALMA archive. We surveyed all the Titan data in the ALMA archive, and extracted some data which were taken with sufficiently high spatial and spectral resolutions that can be endurable for scientific analyses. After careful investigation on the extracted data, we found one data set which contain the emission lines of the rotational transitions of CH3C14N and CH3C15N.
By performing an inversion analysis using a radiative transfer model, we derived the nitrogen isotopic ratio on acetonitrile for the first time. Detail of the analysis will be presented in the meeting.