Mon. Not. R. Astron. Soc., 481, 947-953 (2018/November-3)
A stratified ultrafast outflow in 1H0707-495?
KOSEC P., BUISSON D.J.K., PARKER M.L., PINTO C., FABIAN A.C. and WALTON D.J.
Abstract (from CDS):
Ultrafast outflows (UFOs) have recently been found in the spectra of a number of active galactic nuclei (AGN) and are strong candidates for driving AGN feedback. 1H0707-495 is a highly accreting narrow line Seyfert 1 and the second most X-ray variable bright AGN. Previous studies found evidence of blueshifted absorption at 0.1-0.2c in its spectrum. We perform a flux-resolved analysis of the full XMM-Newton data set on this AGN using both CCD and grating data, focusing on the low flux spectrum. We find strong evidence for a UFO in absorption at ∼0.13c, with an ionization parameter log (ξ/erg cm s–1) = 4.3. Surprisingly, we also detect blueshifted photoionized emission, with the velocity increasing at higher ionization states, consistent with a trend that has been observed in the UV spectrum of this object. The bulk of the X-ray emitting material is moving at a velocity of 8000 km s–1, with ionization parameter log (ξ/erg cm s–1) = 2.4. The wind kinetic power inferred from the UFO absorption is comparable to that of the UV and X-ray emission features despite their different velocities and ionization states, suggesting that we are viewing an energy-conserving wind slowing down and cooling at larger distances from the AGN.
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
accretion, accretion discs - black hole physics - galaxies: individual: 1H0707-495 - galaxies: Seyfert
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