Fine Structure in Quasar Flows Revealed by Lens-Aided Multi-Angle Spectroscopy (LAMAS)

Details Fine Structure in Quasar Flows Revealed by Lens-Aided Multi-Angle Spectroscopy (LAMAS) Fine Structure in Quasar Flows Revealed by Lens-Aided Multi-Angle Spectroscopy (LAMAS)

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0709g&link_type=abstract

American Astronomical Society, HEAD meeting #9, #7.09; Bulletin of the American Astronomical Society, Vol. 38, p.350

Astronomy and Astrophysics

Astronomy

Scientific paper

Spectral differences between lensed quasar image components are
common. Since lensing is intrinsically achromatic, these differences
are typically explained as the effect of either microlensing, or as
light path time delays sampling intrinsic quasar spectral variability.
In some cases, neither explanation seems sufficient. Here we advance a
novel third hypothesis: some spectral differences are due to small line-of-
sight differences through quasar disk wind outflows, taking the widest
separation lens SDSSJ1004+4112 as a key example. We show that small changes in sightline may traverse streams with significantly differing
columns. The implications are many. Fine structure in these outflows
may change the observed spectra on arcsec scales. Though difficult
to detect observationally, high ionization, high velocity-width
streams may sculpt the optical and X-ray spectra of most quasars.
We discuss existing multi-epoch optical/UV spectroscopy and results from X-ray observations both by Chandra and XMM in this context, and sketch further possible tests. The author gratefully acknowledges support through NASA contract NAS8-03060 (CXC).

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