Laboratory Studies Of Astrophysically-interesting Phosphorus-bearing Molecules

Details Laboratory Studies Of Astrophysically-interesting Phosphorus-bearing Molecules Laboratory Studies Of Astrophysically-interesting Phosphorus-bearing Molecules

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21440216z&link_type=abstract

American Astronomical Society, AAS Meeting #214, #402.16; Bulletin of the American Astronomical Society, Vol. 41, p.665

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Over the past year, there has been a renewed interest in the presence of phosphorus-containing molecules in the interstellar medium. Recent observations have increased the number of known interstellar phosphorus-bearing species from two (PN, CP) to six with the identification of HCP, CCP, and PH3 in the carbon-rich circumstellar shell of IRC+10216 and PO in the oxygen-rich envelope of VY Canis Majoris. More species of this type may be present in the ISM, but laboratory rest frequencies, necessary for such detections, are not generally known for many potential molecules. To fill in this gap, we have been conducting measurements of the pure rotational spectra of phosphorus-containing molecules of astrophysical interest, using both millimeter/submm direct absorption and Fourier transform microwave (FTMW) spectroscopy. We have developed a new phosphorus source for this purpose. These methods cover the frequency ranges 65-850 GHz and 4-40 GHz, respectively. Our recent study of the CCP radical (X2Πr) using both of these techniques has resulted in its identification in IRC+10216. Rotational spectra of other molecules such as PCN, HPS, and CH3PH2 have been recorded. We will report on these species and additional new laboratory developments

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