首页|An Exceptionally Powerful, Radiatively Driven Ultrafast Outflow in the
Rapidly Accreting AGN REJ1034+396
An Exceptionally Powerful, Radiatively Driven Ultrafast Outflow in the Rapidly Accreting AGN REJ1034+396
An Exceptionally Powerful, Radiatively Driven Ultrafast Outflow in the Rapidly Accreting AGN REJ1034+396
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Steven Allen,Daniel Wilkins,Chloe Taylor.An Exceptionally Powerful, Radiatively Driven Ultrafast Outflow in the Rapidly Accreting AGN REJ1034+396[EB/OL].(2025-01-09)[2025-10-17].https://arxiv.org/abs/2501.05579.点此复制
We report the analysis of ~1Ms of XMM-Newton observations of the rapidly
accreting active galactic nucleus REJ1034+396. The 0.3-9 keV EPIC-pn spectra
are well described by a model consisting of steep continuum emission from the
corona accompanied by relativistically-blurred reflection from a highly ionized
accretion disk. The source is known to exhibit strong excess soft X-ray
emission, which we show is well represented by thermal disk photons Comptonized
by a warm plasma spanning the inner accretion flow. Additionally, the EPIC-pn
data provide compelling evidence ($\Delta C\sim60$ for 4 additional parameters)
for the presence of an ultrafast outflow (UFO) with a line-of-sight velocity
$v/c=0.307^{+0.001}_{-0.005}$, and an emission signature consistent with
reflection of the corona from modestly ionized, outflowing gas. The
simultaneous $0.5-2.5$\,keV RGS spectra show clear absorption lines. Modelling
of these data confirms the presence of the UFO and constrains its equivalent
hydrogen column density, log $N_\mathrm{H}/$(atom cm$^{-2}$) =
$21.7^{+0.1}_{-0.2}$. The RGS data also reveal at least two warm absorber
components with a modest outflow velocity ($1680^{+40}_{-50}$ km/s). The
measured properties and time evolution of the UFO in REJ1034+396 suggest that
it is formed from collisionally ionized plasma, launched from the disk surface
and accelerated by radiation pressure. The high terminal velocity and
substantial absorbing column density imply that the outflow carries sufficient
momentum and energy to transform its environment, being capable of driving out
essentially all dust and gas it interacts with along the line of sight, even if
the AGN were initially surrounded by a Compton thick absorber.
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