S19B0107

We plan to carry out N-band low-resolution spectroscopy of five recent dusty novae (V435CMa, V5668Cyg, V1831Aql, V5857Sgr, V3362 Oph) aiming to collect mid-infrared spectral samples of unidentified infrared (UIR) band associated with novae. Our preliminary laboratory experimental studies have revealed that the Quenched Nitrogen-included Carbonaceous Compounds (QNCC) produced via plasma chemical vapor deposition (CVD) exhibit infrared absorption spectrum that is remarkably similar to the UIR bands observed in novae. Based on the XANES measurement and elemental analyses of the QNCC, we concluded that the carriers of the UIR bands seen in dusty novae should probably be the QNCC which has amine structures and whose N/C ratio is 3-5 %. By comparing the varieties of UIR bands associated with dusty novae collected in this program with the infrared spectra of QNCC synthesized under various experimental conditions, we aim to demonstrate that QNCCs are identical to the carries of the UIR bands observed in dusty novae and to attain better understanding of the origin of insoluble Organic Matter (IOM) in primitive meteorites of our solar system.


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