HOT NH3 SPECTRA FOR ASTROPHYSICAL APPLICATIONS

We present line lists for ammonia (NH3) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for 12 temperatures (300 degrees C-1300 degrees C in 100 degrees C intervals and 1370 degrees C) and each line list covers the 740-2100 cm(-1) range, which includes the majority of the v(2) umbrella bending mode region (11 mu m) and the v(4) asymmetric bending mode region (6.2 mu m). We also demonstrate the useful technique of obtaining empirical lower state energies from a set of spectra recorded at different sample temperatures. Using our NH3 spectra, we have estimated lower state energies (E-Low in cm(-1)) and our values have been incorporated into the line lists along with calibrated wavenumbers ((v) over tilde in cm(-1)) and calibrated line intensities (S' in cm molecule(-1)) for each line. We expect our hot NH3 line lists to find direct application in the modeling of planetary atmospheres and brown dwarfs.