Interstellar PAHs: from Aromacity Aliphacity, to Superhydrogenation and Deuteration 星际多环芳香烃:从芳香性,脂肪性, 到氢化和氘化芳香烃 杨雪娟 合作者:李爱根, R Glaser,钟建新 2017628@湘潭
星际多环芳香烃：从芳香性，脂肪性， 到氢化和氘化芳香烃 杨雪娟 合作者：李爱根, R. Glaser, 钟建新 2017.6.28 @ 湘潭 Interstellar PAHs: from Aromacity, Aliphacity, to Superhydrogenation and Deuteration
星际未证认红外谱带(UIE) 口UEE 上世纪70年代首次观测到;载体性质尚不清楚; 主导众多天体的中红外辐射,包括反射星云,行星状星云, HI区,原行星状星云,极亮红外星系等( Tielens2008)。 Orion nebula NGC7331 Spitzer: 8 um(red); 4.5 um green)& 3.6 um(blue) Tielens(2008)
星际未证认红外谱带(UIE) UIE ➢ 上世纪70年代首次观测到； 载体性质尚不清楚； ➢ 主导众多天体的中红外辐射，包括反射星云，行星状星云， HII区，原行星状星云，极亮红外星系等 (Tielens 2008)。 Orion Nebula NGC7331 Spitzer : 8 mm (red); 4.5 mm (green) & 3.6 mm (blue) Tielens (2008)
UIE谱带及起源 STretch CH seth Plateau 需分人 140 120 NGC7027 NGC 7027 Orion bar 640. no network H i0yo112162 Onon Bar(H251) 33um<sp2← Aromatic Wavelength(um 34m<$p3← Aliphatic, Vibration of Hydrocarbons Superhydrogenation Tielens( 2008 Hony+(2001) Robertson+(2002); Onaka (2015)
UIE 谱带及起源 NGC7027 Orion Bar Tielens (2008) Hony+ (2001) Robertson+(2002); Onaka (2015) ➢ 3.3mmsp2 Aromatic ➢ 3.4mmsp3 Aliphatic, Vibration of Hydrocarbons Superhydrogenation
UIE载体模型 -CH PAH HAC QCC 1人 Kwok Zhang 2011 象 等等多 Soot Coal/kerogen MAoN” Yang et al.(2017a)
UIE 载体模型 Yang et al. (2017a) Kwok & Zhang 2011
34pm谱征: Aliphacity 15a NGC 1333 Orion Bar w31a I Reflection Nebula) (HII Region) 200 3,13.23.33435 4dIAs21282+500 RAs04296+3429 f CRI 26X (Planetary Nebula) (Protoplanetary Nebula reteplanetary Nebula 2.0 3.2 3.3 3.4 3.13.2 34353.6 g 34700 h M 82 Center M 82 Hale 三 (Debris Disk) (Starburst) 15 / Wavelength (u Wav Yang et al.(2017
3.4 mm谱征: Aliphacity Yang et al. (2017a)
34pm谱征: Aliphacity F1(halo) F2(halo) G2(holo 44A~小响-~MM AN H1(holo) eroE H2(halo) I1(holo) 12(holo) wvng《m J1(halo) Yamagish et al (2012)
3.4 mm谱征: Aliphacity Yamagish et al. (2012)
34m谱征: Aliphacity Wavenumber(cm-1) 3100 3000 2900 2800 0.4 34μm谱征起源: Orion Bar: Emission Spectrum(FJ) Aliphatic 0.3 superhydrogenation? Superhydrogenation 340m aliphatic? 347m3.51ms56gm anharmonicity 0.2 二 0.1 Nc,aliph、A3 3.3 N C,arom A 3.3 GCS 3: Optical Depth (TA)k ww(Galactic center source 3 入(um) Phenanthrene Perylene Li Draine(2012)
3.4 mm谱征: Aliphacity Li & Draine (2012) 3.4 mm谱征起源： ➢ Aliphatic？ ➢ Superhydrogenation? ➢ Anharmonicity？
34m谱征: Aliphacity 口模拟各种星际辐射场下 Aliphatic-PAH光谱 Draine Li 2001; Draine Li 2007) dP Jx(Nc)=/ Cabs(Nc, A)4 BA(T dT Cabs(Nc, A)= Cabs (Nc, aro, A 213.4A3.4Oint3.3(A34/A33) C. ali 丌(入/入34-A3.4/入)2+73.4 216.8568501nt6.2(46.85462) Nc. ali 丌(入/A6.-6.85)2+6.s5 2725入7.250int.2(47.25/A6.2) C.ali 丌(入/A725-入7.25/入)2+25 Nc=24,NC.a=0-12;U=1,102,104,10;MMP83,T=6000K,22000K
模拟各种星际辐射场下Aliphatic-PAH光谱 (Draine & Li 2001; Draine & Li 2007 ) NC = 24, NC,ali = 0-12;U=1, 102 , 104 , 106 ; MMP83, T=6000K, 22000K 3.4 mm谱征: Aliphacity
A3.4/A3.3: Calculated Molecules .∞∞ 8888 1-2-maphthyl-l-phenyletheme 1,12-tripheay Betwen Pyre17 Pyre110 tEk-l--maphtbyl-1,diphenyl I-naphtholkl-dpbenkeu
A3.4/A3.3: Calculated Molecules
3.443.3° MethyI-PAH 2.5 Aliphatic-to-Aromatic C-H Stretch Band Ratio Calculated for Methyl-PAHs 2.0 1.5 This work:14≈1.76 Li draine(2012):A,/A, a 0.68 1.0 Yang et al.(2013)
A3.4/A3.3: Methyl-PAH Yang et al. (2013)