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Kormann, Hermut

doi:10.1007/978-3-642-16351-7_10

Cited by 1 publication

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“…This was scaled to reproduce the mean opacity of FG10, and includes the ionizing effect of continuously shining quasar at z = 3.62 with the average quasar spectrum of Madau, Haardt & Rees (1999) (James Bolton, private communication). B1422+231's unlensed absolute magnitude is calculated assuming α = −0.8, m V = 16.4-16.7 for lensed image A (Remy et al (1993); Yee & Ellington (1994); CASTLES survey 1 ), and a lensing magnification of µ A ∼ 5-10; (Kormann, Schneider & Bartelmann 1994;Mediavilla et al 2009;Schechter et al 2014). B1422+231 is extremely luminous, with M V ∼ 28.6 to 29.6.…”

Section: The Intrinsic Lyman-α Forestmentioning

confidence: 99%

The intrinsic far-UV spectrum of the high-redshift quasar B1422+231

O’Dowd

Bate

Webster

et al. 2017

Monthly Notices of the Royal Astronomical Society

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We present new spectroscopy of the z = 3.62 gravitationally lensed quasar B1422+117 from the Gemini North GMOS integral field spectrograph. We observe significant differential magnifications between the broad emission lines and the continuum, as well as across the velocity structure of the Lyman-α line. We take advantage of this differential microlensing to algebraically decompose the quasar spectrum into the absorbed broad emission line and absorbed continuum components. We use the latter to derive the intrinsic Lyα forest absorption spectrum. The proximity effect is clearly detected, with a proximity zone edge of 8.6-17.3 Mpc from the quasar, implying (perhaps intermittent) activity over at least 28 Myrs. The Lyα line profile exhibits a blue excess that is inconsistent with a symmetric fit to the unabsorbed red side. This has important implications for the use of this fitting technique in estimating the absorbed blue Lyα wings of Gunn-Peterson trough quasars.

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