Lens-Aided Multi-Angle Spectroscopy (LAMAS)

How spectral differences between lensed quasar images may reveal important new information about outflows in AGN

ApJ, in press (astro-ph/0603033)

Paul Green (CfA)

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SDSS J1004+4112

Spectroscopic Differences in Lensed Spectroscopic Differences in Lensed Quasar ImagesQuasar Images

Bona fide lensed quasars show significant differences between image components in

• Optical/UV spectra– HE2149--2745; SBS1520+530 (Burud et al. 2002)

– SDSSJ1004+4112 (Inada et al. 2003)

– SDSSJ1206+4332 (Oguri 2005)

• Absorber properties in BALQSO lenses– APM0829+5255 (Lewis et al. 2002)

– H1413+117 (Angonin et al. 1990)

Hypothesis 1: MicrolensingHypothesis 1: Microlensing

• Integral field spectroscopy from [Wisotski et al. 2004] shows that A/B continuua are identical while CIV difference persist

• Microlensing unlikely to amplify part of the BELR but not the continuum region

• CIV blue wing enhancement disappears and reappears

• Strong profile differences persist in CIII] and MgII [Richards et al. 2004], which originate from larger regions.

Hypothesis 2:Intrinsic VariabilityHypothesis 2:Intrinsic Variability

• The asymmetry (rA-rB)/(rA+rB) of the A and B images wrt the lens means the maximum delay between them is <30d [Oguri et al. 2004]

• B never showed a bluewing bump, although

it persisted in A for >>1 month. [Richards et al. 2004]

Differential Absorption?

Differential Absorption?

SDSS BAL and non-BAL QSO Composites

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Skimming the Spinning Dented Bugle Bell?

Elvis (2000)

GeometryGeometry

LAMAS and variability in SDSSJ1004+4112 provide complementary constraints on absorber size

tVa transV

θ From absorber distance; image splittingaRa

From rotation speed; variability timescale (a<300AU)

aR (~100 lt-d or 1017cm), but OK within recent BALR distance estimates of 5 – 700pc (deKool et al 2001, Everett et al. 2002) 30<a<3000 AU

No match for ~RBELR

Variability in X-ray Absorbers

Ubiquitous!Risaliti, Elvis & Nicastro (2002)

Fast!Elvis et al. 2004 (NGC 4388)

Ubiquitous Warm Broad Absorbers?

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LAMAS

• The A image of SDSS J1004+4112 shows variable spectral differences not easily explained by microlensing or variability+time delay.

• SDSS J1004 and other lenses may illustrate that small angle changes to the nuclear region can strongly affect spectral details.

• The spectral differences mimic differential absorption from a high column, highly ionized wind.

Further Implications

• Quasars have high column, highly ionized winds.

• All quasar spectra may be self-absorbed by their smoothly outflowing winds.

• In a large sample of lenses, spectral difference should correlate with θ and be independent of proximity to a bright galaxy of high microlensing optical depth.

• X-ray measurements during a similar UV blue emission line asymmetry event should show lower absorption in that

component.