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High-resolution X-Ray Spectroscopy of the Seyfert 1 Galaxy Mrk 1040. Revealing the Failed Nuclear Wind with Chandra

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posted on 2019-08-23, 15:48 authored by JN Reeves, V Braito, E Behar, TC Fischer, SB Kraemer, A Lobban, E Nardini, D Porquet, TJ Turner
High-resolution X-ray spectroscopy of the warm absorber in the nearby X-ray bright Seyfert 1 galaxy Mrk 1040 is presented. The observations were carried out in the 2013–2014 timeframe using the Chandra High Energy Transmission Grating with a total exposure of 200 ks. A multitude of absorption lines from Ne, Mg, and Si are detected from a wide variety of ionization states. In particular, the detection of inner K-shell absorption lines from Ne, Mg, and Si, from charge states ranging from F-like to Li-like ions, suggests the presence of a substantial amount of low-ionization absorbing gas, illuminated by a steep soft X-ray continuum. The observations reveal at least three warm absorbing components ranging in ionization parameter from $\mathrm{log}(\xi /\mathrm{erg}\,\mathrm{cm}\,{{\rm{s}}}^{-1})=0\mbox{--}2$ and with column densities of ${N}_{{\rm{H}}}=1.5\mbox{--}4.0\times {10}^{21}$ cm−2. The velocity profiles imply that the outflow velocities of the absorbing gas are low and within ±100 km s−1 of the systemic velocity of Mrk 1040, which suggests that any outflowing gas may have stalled in this AGN on large enough scales. The warm absorber is likely located far from the black hole, within 300 pc of the nucleus, and is spatially coincident with emission from an extended narrow-line region as seen in the Hubble Space Telescope images. The iron K-band spectrum reveals only narrow emission lines, with Fe Kα at 6.4 keV consistent with originating from reflection off Compton-thick pc-scale reprocessing gas.


J.N.R. acknowledges Chandra grant number GO3-14123X, as well as NASA grant numbers NNX16AE11G and NNX15AF12G. T.J.T. acknowledges NASA grant number NNH13CH63C. Both J.N.R. and A.L. acknowedge support from STFC, via the consolidated grants ST/M001040/1 and ST/K001000/1. D.P. acknowledges financial support from the European Union Seventh Framework Program (FP7/2007-2013) under grant agreement number 312789. E.B. is supported by the the European Unions Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 655324 and by the I-CORE program of the Planning and Budgeting Committee (grant number 1937/12). E.N. also acknowledges funding from the European Unions Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No. 664931. T.C.F. was supported by an appointment to the NASA Postdoctoral Program at the NASA Goddard Space Flight Center, administered by Universities Space Research Association under contract with NASA.



The Astrophysical Journal, 2017, 837 (1), pp. 23-23

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/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy


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