Study of interstellar and circumstellar ice analogs using terahertz pulsed spectroscopy and Fourier-transform infrared spectroscopy
A.A. Gavdush (1,2), B.M. Giuliano (3), B. Müller (3), G.A. Komandin (1),
K.I. Zaytsev (1,2), A.V. Ivlev (3), and P. Caselli (3)
1 - Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow 119991, Russia;
2 - Bauman Moscow State Technical University, Moscow 105005, Russia;
3 - Max-Planck-Institut für extraterrestrische Physik, Garching bei München 85748, Germany
Abstract
There are many astrophysical problems [1,2] which require a knowledge of the complex dielectric permittivity of ices in the Universe. The presently available laboratory data on the dielectric properties of such ices in the far infrared (IR) and terahertz (THz) spectral regions is scarce and insufficient, while the observations are provided by modern instruments [3,4]. In the present work we are aimed at the extension of our research [5,6] to the more broad spectral range combining measurements from different types of spectrometers. The algorithm for direct reconstruction of both real and imaginary parts of the dielectric permittivity for the interstellar and circumstellar ice analogs has been developed. The obtained results are in a good agreement with partly available data [7]. The proposed experimental setup and processing principles will be translated to study ices of various molecular composition in different conditions.
This work was partially supported by the Russian Science Foundation, Project #18-32-00816.
[1] Astronomy & Astrophysics 338(L63) (1998).
[2] The Astrophysical Journal 523(L165) (1999).
[3] Proceedings of the IEEE 97(8), 1403 (2009), DOI: 10.1109/JPROC.2009.2017106.
[4] Advances in Space Research 44(4), 413 (2009), DOI: 10.1016/j.asr.2009.04.011.
[5] Astronomy & Astrophysics 629(A112) (2019), DOI: 10.1051/0004-6361/201935619.
[6] EPJ Web of Conferences 195, 06004 (2018), DOI: 10.1051/epjconf/201819506004.
[7] Journal of Chemical Physics 46(10), 3991 (1967), DOI: 10.1063/1.1840475.
Speaker
Arsenii A. Gavdush
Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow 119991, Russia
Russia
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