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Soft X-ray Spectral Features of Seyfert 1 observed with ASCA

Soft X-ray Spectral Features of Seyfert 1 observed with ASCA. K. Hayashida (Osaka University). Seyfert 1 Soft X-ray Spectral Features. Warm Absorber Clear Evidence of OVII, OVIII edges Variability Soft X-ray Excess BB fit kT~0.1keV

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Soft X-ray Spectral Features of Seyfert 1 observed with ASCA

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  1. Soft X-ray Spectral Features of Seyfert 1 observed with ASCA K. Hayashida(Osaka University)

  2. Seyfert 1 Soft X-ray Spectral Features • Warm Absorber • Clear Evidence of OVII, OVIII edges • Variability • Soft X-ray Excess • BB fit kT~0.1keV • Soft X-ray Component in Narrow Line Seyfert 1

  3. logNw=21.8,x=39 logNw=22.1,x=45 Warm Absorber • MCG-6-30-15 • Fabian et al., 1994 • NGC4051 with Soft Excess • Mihara et al.1994 • NGC3783 with Emission Line • George et al. 1996 • NGC4151… Complex • Weaver et al., 1994 • IC4329A, MR2251, Mrk766,…

  4. t(OVII) almost constant t(OVIII) anti-correlates with Fx Origin of Warm Absorber • Relation to the BLR • Link to UV absorbers • Dusty Warm Absorber (Molecular Torus)? Only in RQ sources ?

  5. Chandra Observations (NGC3783, NGC5548) • Narrow Absorption Lines from H-like or He-like ions of C, N, O, Ne, Na, Mg, Si, Fe • OVII, OVIII edge were NOT detected. (NGC5548)

  6. NGC3783 (Chandra MEG;56ks) 過去のデータの再フィット ASCAの観測提案　

  7. Emission from Accretion Disk? Soft X-ray Excess • NGC4051, Mihara et al. 1994 • PG1211+143, Yaqoob et al., 1994. • NGC5506, Wang et al., 1996 • 3C273, Cappi et al., 1998 • Reynolds, 1997 • 24 Type1 AGNs (RQ+RL) ; Soft Excess in 7 objects • Murakami, 1997, Murakami et al., 2000. • 10AGNs; Soft Excess (f0.5>0.1) was found in 9 objects • BB kT~0.1keV or Brems~0.2keV

  8. Correlation with UV-flux fse(ASCA0.5keV) Correlates with fse(ROSAT0.1-0.4keV) . BB luminosity >Ledd More Sophisticated model is needed. fse:Soft Excess Comp/ Power Law Comp at 0.5 keV Soft X-ray Excess (Murakami, et al.)

  9. Seyfert Type 1 whose Broad Emission Line Width is Narrow. (???) ここで突然。。。　　　　　　　　Narrow Line Seyfert 1 (NLS1)

  10. Boller et al., 1997 X-ray Studies with ROSAT • Prototype=IRAS13224-3809 • Steep Soft X-ray Index G=4.4±0.2 • Rapid & Large Amplitude Variability Common for NLS1 at Some Level

  11. ASCA … Spectrum Above 2keV • Two Components Spectrum (e.g. Otani et al.1996) • Soft Component ~BB kT=0.1-0.2keV • Hard Tail above 2 keV • Hard PL Index Steeper (G>2) than BLS1 (Brandt et al., 1997) • See Leighly, 1999 and reference therein.

  12. Peculiar Spectral Feature around 1keV • Otani et al (1996), Hayashida et al (1997), Leighly et al. (1997) • 0.2-0.3c blue shifted absorption edge ? • 0.5-0.6c blue shifted absorption line ? • Emission line ?

  13. kTBB vs Soft Excess Ratio

  14. BB Fit ->Area->BH Size K. Hayashida, 2000.

  15. NLS1 降着円盤からの輻射であれば。。。 SlimDiskModel Mineshige et al., 2000

  16. まとめ • Warm　Absorber • Seyfert（Radio　Quiet　AGN？）に共通する性質 • 起源については未解決 • グレーティングの観測で新たな次元 • Soft　X-ray　Excess • NLS1のソフト成分（ｋT~0.1keV)として復活 • 降着円盤起源であれば理論モデルに重要な貢献

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