Laboratory Astrophysics

Advances in the sensitivity and angular resolving power of millimeter and submillimeter telescopes [1].

Quantum mechanical (QM) analyses [5].that accounts for the large majority of these unassignable astrophysical lines.

We have recently shown that an alternative to the QM analysis method, based on analyses of complete, intensity calibrated spectra taken at many temperatures, can dramatically increase the inclusiveness of astrophysical catalogs in the millimeter and submillimeter spectral region [9]. This method is much simpler because it requires neither spectral assignment nor model building for these complex perturbed spectra.

References

  1. Clery, D. Herschel Will Open a New Vista on Infant Stars and Galaxies Science 324, 584-586 (2009). Google Scholar
  2. Turner, J. L. & Wootten, H. A. Atacama Large Millimeter/Submillimeter Array Highlights of Astronomy 14, 520-521 (2006). Google Scholar
  3. Becklin, E. E. Stratospheric Observatory for Infrared Astronomy (SOFIA) Adv. Space Res. 36, 1087-1090 (2005). Google Scholar
  4. Goldsmith, P. F., Bergin, T., De Lucia, F. C., Hasan, H., Herbst, E., Melnick, G. & Pearson, J. C. Report from the workshop on laboratory spectroscopy in support of Herschel, Sofia, and Alma, Pasadena (California Institute of Technology, 2006).
  5. Cazzoli, G. & Kisiel, Z. The Rotational Specrum of Acrylonitrile in Excited States of the Two Low-Frequency CCN Bending Vibrational Modes J. Mol. Spectrosc. 130, 303-315 (1988). Google Scholar
  6. Müller, H. S. P., Schloder, F., Stutzki, J. & Winnewisser, G. The Cologne Database for Molecular Spectroscopy J. Mol. Struct. 742, 215-227 (2005). Google Scholar
  7. Pickett, H. M., Poynter, R. L., Cohen, E. A., Delitsky, M. L., Pearson, J. C. & Müller, H. S. P. Submillimeter, Millimeter, and Microwave Spectral Line Catalog J. Quant. Spectrosc. Radiat. Transfer 60, 883-890 (1998). Google Scholar
  8. Medvedev, I. R. & De Lucia, F. C. An Experimental Approach to the Prediction of Complete Millimeter and Submillimeter Spectra at Astrophysical Temperatures: Applications to Confusion-limited Astrophysical Observations Astrophys. J. 656, 621-628 (2007). Google Scholar
  9. Fortman, S. M., Medvedev, I. R., Neese, C. F. & De Lucia, F. C. A New Approach to Astrophysical Spectra: The Complete Experimental Spectrum of Ethyl Cyanide (CH3CH2CN) between 570 and 645 GHz Astrophys. J. 714, 476-486 (2010). Google Scholar
  10. Fortman, S. M., Medvedev, I. R., Neese, C. F. & De Lucia, F. C. How Complete are Astrophysical Catalogs for the Millimeter and Submillimeter Spectral Region? Astrophys. J., Lett. 725, L11-L14 (2010). Google Scholar