Global assignment and extension of millimeter- and submillimeter-wave spectral database of C1-methyl formate (HCOOCH3) in the ground and first excited states

نویسنده

  • M. Carvajal
چکیده

A compilation of the available spectroscopic millimeter and submillimeterwave data of the ground and first excited states of C1-methyl formate has been carried out. The exhaustive analysis of the available transition lines of HCOOCH3 (Willaert et al. 2006; Maeda et al. 2008a,b; Carvajal et al. 2009) has led to the assignment of 7457 spectral lines by means of a global fit of 45 parameters, using the RAM method and the BELGI-Cs code, with a resulting unitless standard deviation of 0.57. Over 1600 lines are included for the first time in the fit. In addition, the line strengths of spectral lines are also calculated using the most recent experimental measurement of the electric dipole moment (Margulès et al. 2010). In conclusion, the present study represents a notable improvement with respect to previous HCOOCH3 spectral analyses. Therefore the better accuracy of the present analysis may help the future identification of new C1-methyl formate lines in the interstellar and circumstellar media, and may contribute to decrease some of the spectral confusion due to this species in astronomical surveys. Subject headings: catalogs submillimeter millimeter techniques: spectroscopic Online material: machine-readable tables

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تاریخ انتشار 2010