grb absorption spectroscopy - Inaf

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FINE STRUCTURE FEATURES How to populate fine structure excited levels: 1. Collisional processes: 2. Radiative processes: Incident UV radiation Incoming e - 2a. Indirect UV pumping Photoexcitation n + 1 Radiative de-excitation n J=3/2 J=1/2 Incident IR radiation (Si II, C II) (Fe II) n (O I) 2b. Direct IR pumping STRONG VARIABILITY EXPECTED! J=2 J=1 J=0 Selection rule: ΔJ=0,±1 n J=1/2 J=3/2 J=5/2 J=7/2 J=9/2
GRB 060418: VARIABILITY Fine structure variability: hint of UV pumping… Vreeswijk et al. 2007
Page 1 and 2: Absorption studies of GRB afterglow
Page 3 and 4: Suitable to: GRB ABSORPTION SPECTRO
Page 5 and 6: LOW - RES GRBs GRBs provide an inde
Page 7 and 8: Advantages: Piranomonte et al. 2008
Page 9: FINE STRUCTURE FEATURES The gross s
Page 14 and 15: CrII groud state line is decreasing
Page 18 and 19: OVI Lyβ SII NiII NV NiII Lyα OI/S
Page 20 and 21: MAIN SYSTEM METALLICITY Ly_α Missi
Page 26 and 27: CONCLUSIONS GRBs are a new tool to
Page 28 and 29: GRB explosion site Host gas far awa
Page 32 and 33: GRB 050730 The main system presents
Page 34 and 35: GRB 050730 Fine structure transitio
Page 36: GRB 050730 Second component: UV pum
Page 39 and 40: GRB080319B - MAIN SYSTEM: COMPONENT
Page 41 and 42: GRB080319B - MAIN SYSTEM: COMPONENT
Page 43 and 44: FINE STRUCTURE LINE VARIABILITY Fin
Page 45: GRB080319B - TIME DEPENDENT MODELIN
Page 48 and 49: GRB080330 - MAIN SYSTEM: COMPONENTS
Page 51 and 52: INTERVENING ABSORBERS GRB Strong Mg
Page 53 and 54: FINE STRUCTURE AND EXCITED LINES Id

grb absorption spectroscopy - Inaf

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