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• W2028291985 endingPage "557" @default.
• W2028291985 startingPage "551" @default.
• W2028291985 abstract "A recent observation of the nearby (z = 0.042) narrow-line Seyfert 1 galaxy RE J1034+396 on 2007 May 31 showed strong quasi-periodic oscillations (QPOs) in the 0.3–10 keV X-ray flux. We present phase-resolved spectroscopy of this observation, using data obtained by the EPIC PN detector on board XMM-Newton. The low phase spectrum, associated with the troughs in the light curve, shows (at >4σ confidence level) an absorption edge at 0.86 ± 0.05 keV with an absorption depth of 0.3 ± 0.1. Ionized oxygen edges are hallmarks of X-ray warm absorbers in Seyfert active galactic nuclei; the observed edge is consistent with H-like O viii and implies a column density of NO viii ∼ 3 × 1018 cm−2. The edge is not seen in the high phase spectrum associated with the crests in the light curve, suggesting the presence of a warm absorber in the immediate vicinity of the supermassive black hole that periodically obscures the continuum emission. If the QPO arises due to Keplerian orbital motion around the central black hole, the periodic appearance of the O viii edge would imply a radius of for the size of the warm absorber." @default.
• W2028291985 created "2016-06-24" @default.
• W2028291985 creator A5025039442 @default.
• W2028291985 creator A5028766680 @default.
• W2028291985 date "2010-07-01" @default.
• W2028291985 modified "2023-10-10" @default.
• W2028291985 title "EVIDENCE OF A WARM ABSORBER THAT VARIES WITH QUASI-PERIODIC OSCILLATION PHASE IN THE ACTIVE GALACTIC NUCLEUS RE J1034+396" @default.
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• W2028291985 doi "https://doi.org/10.1088/0004-637x/718/1/551" @default.
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