Radiation Spectral Analysis of 3D Dust Molecular Clusters(PAHs)and Peptoids under Ionization and Electric Field in ISM  

作　　者：Ruiqing Wu Chunhua Zhu Guoliang Lü Xiaojiao Zhang Xizhen Lu Jinlong Yu Wujin Chen Mengqiu Long 

机构地区：[1]School of Physics and Electronics,Central South University,Changsha 410083,China [2]School of Physical Science and Technology,Xinjiang University,Urumqi 830046,China [3]School of Microelectronics and Physics,Hunan University of Technology and Business,Changsha 410205,China [4]College of Mechanical and Electronic Engineering,Tarim University,Alar 843300,China [5]School of Medicine,Xinjiang Medical University,Urumqi 830011,China

出　　处：《Research in Astronomy and Astrophysics》2024年第1期70-77,共8页天文和天体物理学研究（英文版）

基　　金：the Independent Innovation Project for Postgraduates of Central South University(No.160171008);the National Natural Science Foundation of China(project No.U2031204);the project of Xinjiang(No.2021D01C075)。

摘　　要：Polycyclic aromatic hydrocarbons(PAHs),PANHs,and peptoids dust spectral calculations from the interstellar medium(ISM)are important for dust observations and theory.Our goal is to calculate the radiation spectrum of spherical PAHs dust clusters in a vacuum containing ionized and applied in the presence of an electric field.We propose a new simple computational model to calculate the size of three-dimensional spherical dust clusters formed by different initial dust structures.By the Vienna Ab-initio Simulation Package code,the density functional theory with the generalized approximation was used to calculate the electron density gradient and obtain the radiation spectrum of dust.When the radius of spherical dust clusters is~[0.009-0.042]μm,the dust radiation spectrum agrees well with the Z=0.02 mMMP stellar spectra,and the PAHs radiation spectrum of NGC 4676 at wavelengths of(0-5]μm and(5-10]μm,respectively.In the ionized state,the N-PAH,C_(10)H_(9)N,2(C_(4)H_(4))^(1+),and peptoids 4(CHON),(C_(8)H_(10)N_(2)O_(5))^(1+)dust clusters at 3.3μm,while the 2(C_(22)H_(21)N_(3)O_(2))^(1+),4(CHON)dust clusters at 5.2μm have obvious peaks.There is a characteristic of part of PAHs and peptoids clusters radiation at the nearinfrared wavelength of 2μm.However,especially after applying an electric field to the dust,the emission spectrum of the dust increases significantly in the radiation wavelength range[3-10]μm.Consequently,the dust clusters of PAHs,PANHs,and peptoids of the radius size~[0.009-0.042]μm are likely to exist in the ISM.

关 键 词：ISM:structure ISM:molecules radiation mechanisms:general (ISM:)dust EXTINCTION 

分 类 号：P141.5[天文地球—天体物理]