A high-density relativistic reflection origin for the soft and hard X-ray excess emission from Mrk 1044

Abstract

We present the first results from a detailed spectral-timing analysis of a long ($\sim$130 ks) XMM-Newton observation and quasi-simultaneous NuSTAR and Swift observations of the highly-accreting narrow-line Seyfert 1 galaxy Mrk 1044. The broadband (0.3$-$50 keV) spectrum reveals the presence of a strong soft X-ray excess emission below $\sim$1.5 keV, iron K${}_{\alpha }$ emission complex at $\sim$6$-$7 keV and a `Compton hump' at $\sim$15$-$30 keV. We find that the relativistic reflection from a high-density accretion disc with a broken power-law emissivity profile can simultaneously explain the soft X-ray excess, highly ionized broad iron line and the Compton hump. At low frequencies ($[2-6]\times 10^{-5}$ Hz), the power-law continuum dominated 1.5$-$5 keV band lags behind the reflection dominated 0.3$-$1 keV band, which is explained with a combination of propagation fluctuation and Comptonization processes, while at higher frequencies ($[1-2]\times 10^{-4}$ Hz), we detect a soft lag which is interpreted as a signature of X-ray reverberation from the accretion disc. The fractional root-mean-squared (rms) variability of the source decreases with energy and is well described by two variable components: a less variable relativistic disc reflection and a more variable direct coronal emission. Our combined spectral-timing analyses suggest that the observed broadband X-ray variability of Mrk~1044 is mainly driven by variations in the location or geometry of the optically thin, hot corona.

arXiv comment23 pages, 19 figures, 4 tables, Published in MNRAS

References in corpus (41)

• The Swift X-ray Telescope
• The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission
• On characterising the variability properties of X-ray light curves from active galaxies
• Calibration of X-ray absorption in our Galaxy
• Improved Reflection Models of Black-Hole Accretion Disks: Treating the Angular Distribution of X-rays
• Intrinsic disc emission and the Soft X-ray Excess in AGN
• RXTE Observation of Cygnus X-1: II. Timing Analysis
• An Explanation for the soft X-ray excess in AGN
• Investigating a Fluctuating-accretion Model for the Spectral-timing Properties of Accreting Black Hole Systems
• X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180
• On the X-ray time lags in the black hole candidates
• Combined Long and Short Timescale X-ray Variability of NGC4051 with RXTE and XMM-Newton
• Soft state of Cygnus X-1: stable disk and unstable corona
• A rapidly spinning supermassive black hole at the centre of NGC 1365
• Discovery of a relation between black hole mass and soft X-ray time lags in active galactic nuclei
• High-Density Effects in X-ray Reflection Models from Accretion Disks
• Relativistic iron K X-ray Reverberation in NGC 4151
• Evidence of a high velocity ionised outflow in a second narrow line quasar PG0844+349
• The response of relativistic outflowing gas to the inner accretion disk of a black hole
• 1H0707-495 in 2011: An X-ray source within a gravitational radius of the event horizon
• Discovery of high-frequency iron K lags in Ark 564 and Mrk 335
• Long-Term X-ray Spectral Variability in Seyfert 1 Galaxies
• The broad band spectral variability of MCG-6-30-15 observed by NuSTAR and XMM-Newton
• The 1.5 Ms Observing Campaign on IRAS 13224-3809: X-ray Spectral Analysis I
• X-ray reverberation in 1H0707-495 revisited
• The soft X-ray emission of Ark 120. XMM-Newton, NuSTAR, and the importance of taking the broad view
• Discovery of a ~2 hr high frequency X-ray QPO and iron K alpha reverberation in the active galaxy MS 2254.9-3712
• Ultrafast outflows disappear in high radiation fields
• A reflection origin for the soft and hard X-ray excess of Ark 120
• The remarkable X-ray variability of IRAS 13224-3809 I: The variability process
• An investigation of the origin of soft X-ray excess emission from Narrow-line Seyfert 1 galaxies Akn564 and Mrk1044
• X-ray Variability of the Seyfert 1 Markarian 335: Power Spectrum and Time Lags
• Revealing the X-ray Variability of AGN with Principal Component Analysis
• The Energy-dependent X-ray Timing Characteristics of the Narrow Line Seyfert 1 Mkn 766
• The flux-dependent X-ray time lags in NGC 4051
• Caught in the act: Measuring the changes in the corona that cause the extreme variability of 1H 0707-495
• The Compton hump and variable blue wing in the extreme low-flux NuSTAR observations of 1H0707-495
• The changing X-ray time lag in MCG-6-30-15
• A deep X-ray view of the bare AGN Ark 120. III. X-ray timing analysis and multiwavelength variability
• Energy-dependent variability of the bare Seyfert 1 galaxy Ark 120
• Accretion disc-corona and jet emission from the radio-loud narrow-line Seyfert 1 galaxy RX J1633.3+4719

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• High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
• The Soft-Excess in Mrk 509: Warm Corona or Relativistic Reflection?
• Evolution of a Relativistic Outflow and X-ray Corona in the Extreme Changing-Look AGN 1ES 1927+654
• Fundamental X-ray Corona Parameters of Swift/BAT AGN
• High-ionization emission line ratios from quasar broad line regions: metallicity or density?
• Sustaining a Warm Corona in Active Galactic Nuclei Accretion Discs
• High-density disc reflection spectroscopy of low-mass active galactic nuclei
• Detection of a Multi-Phase Ultra-Fast Wind in the Narrow-Line Seyfert 1 Galaxy Mrk 1044
• A NuSTAR View of GRS 1716$-$249 in the Hard and Intermediate States
• XMM-Newton Observations of the Narrow-Line Seyfert 1 Galaxy IRAS 13224$-$3809 : X-ray Spectral Analysis II
• Black Hole Spin Measurements Based on a Thin Disc Model with Finite Thickness I. An example study of MCG-06-30-15
• A deep, multi-epoch Chandra HETG study of the ionized outflow from NGC 4051
• Discovery of soft and hard X-ray time lags in low-mass AGNs
• Constraints on the ultra-fast outflows in the narrow-line Seyfert 1 galaxy Mrk 1044 from high-resolution time- and flux-resolved spectroscopy
• The Close AGN Reference Survey (CARS): No evidence of galaxy-scale hot outflows in two nearby AGN
• Broadband spectral analysis of Mrk 926 using multi-epoch X-ray observations
• AstroSat view of spectral transition in the changing-look active galaxy NGC1566 during the declining phase of the 2018 outburst
• A Search for X-ray/UV Correlation in the Reflection-Dominated Seyfert 1 Galaxy Mrk 1044
• Large-amplitude rapid X-ray variability in the narrow-line Seyfert 1 galaxy PG 1404$+$226
• Modeling the upper kHz QPOs of 4U 1728-34 with X-ray reverberation
• Constraining black hole spin in PG 1535+547 amidst complex multi-layered absorption
• X-ray spectroscopy of hot dense plasmas using LLNL's upgraded Titan 2$\omega$ short-pulse laser
• The Origin of X-ray Emission in the Gamma-ray emitting Narrow-Line Seyfert 1 1H 0323+342
• Measuring black hole spin through gravitational lensing of pulsars
• Probing the Black Hole Engine with Measurements of the Relativistic X-ray Reflection Component