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Quenched Nitrogen-included Carbonaceous Composite (QNCC): A powerful candidate of the carriers of the UIR bands in classical novae

Published online by Cambridge University Press:  12 October 2020

Izumi Endo Open the ORCID record for Izumi Endo [Opens in a new window] ,
Itsuki Sakon ,
Takashi Onaka ,
Andrew L. Helton ,
Ryan M. Lau ,
Seiji Kimura ,
Setsuko Wada ,
Nanako Ogawa ,
Naohiko Ohkouchi  and
Yoko Kebukawa
Izumi Endo
Affiliation:
University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033, Japan
Itsuki Sakon
Affiliation:
University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033, Japan
Takashi Onaka
Affiliation:
University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033, Japan
Andrew L. Helton
Affiliation:
SOFIA Science Center, USRA, NASA Ames Research Center MS N232-12, Moffett Field, CA 94035, USA
Ryan M. Lau
Affiliation:
Institute of Space and Astronautical Science/Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara City, Kanagawa, 252-5210, Japan
Seiji Kimura
Affiliation:
The University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan
Setsuko Wada
Affiliation:
The University of Electro-Communications 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan
Nanako Ogawa
Affiliation:
Japan Agency for Marine-Earth Science and Technology 2-15, Natsushima-cho, Yokosuka-city Kanagawa 237-0061 Japan
Naohiko Ohkouchi
Affiliation:
Japan Agency for Marine-Earth Science and Technology 2-15, Natsushima-cho, Yokosuka-city Kanagawa 237-0061 Japan
Yoko Kebukawa
Affiliation:
Yokohama National University 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8051, Japan
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Abstract

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We have succeeded in synthesizing organics, ‘Quenched Nitrogen-included Carbonaceous Composite (QNCC)’, via plasma chemical vapor deposition (CVD) method, whose infrared spectral properties reproduce the characteristics of the unidentified infrared (UIR) bands observed around classical novae. Past studies have shown that the UIR bands observed around novae appear somewhat differently from those observed in other astrophysical environment and are predominantly characterized by the presence of a broad 8μm feature. The remarkable similarity between the infrared properties of QNCC and the UIR bands in novae indicates that QNCC should be considered as a strong candidate of the carriers of the UIR bands in novae. Finally, we have started a space exposure experiment of QNCC aiming to explore the evolutional link between the QNCC and the insoluble organic molecule (IOM) in carbonaceous condrite and, thus, to infer the origins of organics in our solar system.

Keywords

(ISM:) dustextinctionISM: lines and bandsinfrared: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 425 - 426
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© International Astronomical Union 2020

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