14 NGC 4449 NGC 4485 Sm./Im Sm/Im 12 10 4000 4600 6)C0 6600 3003 65C0 7050 4000 4500 6000 6600 6000 6500 7000 12 30 NGC 4670 [Haro S) NGC 1569 SB pee Sm/Im 10 [ou] 25 Ho 8 20 15 [o叮 10 [NI [S] H邱 Nal o 0 4000 4600 60C0 E500 6003 6500 7000 4000 4500 5000 5500 6000 e500 7000 Wavelength (A) Waveleagth (a)
光谱种类 0 连续光谱：能量在所有波长处连续分布，没 有间隔。 口谱线 ■线状光谱：分立的吸收或发射谱线组成的光谱。 带状光谱：由一象列谱线组成光谱带。 光谱是如何产生的？
q 连续光谱：能量在所有波长处连续分布，没 有间隔。 q 谱线： n 线状光谱：分立的吸收或发射谱线组成的光谱。 n 带状光谱：由一系列谱线组成光谱带。 光谱种类 光谱是如何产生的?
Excitation and de-excitation: Photon Photon Ground First Ground state excited Photon state (a) state Photon Photon First Ground excited state state Ground Second Photon state excited state Ground (b) state G
Excitation and de-excitation:
Free Electrons Eoo= 13.6eV 543 13.04eV 12.73eV Py PB Pa 12.07eV Paschen Series 2 10.19eV HsHyHg Ho First excited state Balmer Series uonezruol n=1 Ground State L8LyLBLa E1=0eV Lyman Series Hydrogen energy-level diagram
Hydrogen energy-level diagram
A Brief List of Lines and Wavelengths 波长 谱线 5191.8 [ArIII] 7005.7 [ArV] 3727.0 [oI] 5577.4 [oI] 7135.8 [ArIII] 4011.6 [NeIII] 5754.6 (NII] 7170.6 [ArIV] 4068.6 [sm 6133.1 [ArV] 7237.3 [ArIV] 4076.4 [sm] 6300.3 [oI] 7262.8 [ArIV] 4363.2 [on 6312.1 (sm] 7319.9 [om 4625.5 [ArV] 6363.8 [o] 7319.9 [om 4711.3 [ArIV] 6391.6 [o] 7330.2 [om 4714.3 [NeIv] 6435.1 [ArV] 7330.2 [om 4715.6 [NeIV] 6527.1 (NII] 7331.4 [ArIV] 4724.2 [NeIv] 6548.1 [NII] 7751.1 [ArIII] 4740.2 [ArIV] 6562.85 H-alpha 8036.3 [ArIII] 4931.0 [on 6583.4 [NII] 8830.9 (sm 4958.9 [on] 6716.4 [sm] 9069.0 [SI 5006.9 [on 6730.8 (sm] 9531.8 (SI]