An upper limit on nickel overabundance in the supercritical accretion disk wind of SS 433 from X-ray spectroscopy

Abstract

We take advantage of a long (with a total exposure time of 120 ks) X-ray observation of the unique Galactic microquasar SS 433, carried out with the XMM-Newton space observatory, to search for a fluorescent line of neutral (or weakly ionized) nickel at the energy 7.5 keV. We consider two models of the formation of fluorescent lines in the spectrum of SS 433: 1) due to reflection of hard X-ray radiation from a putative central source on the optically thick walls of the accretion disk "funnel"; and 2) due to scattering of the radiation coming from the hottest parts of the jets in the optically thin wind of the system. It is shown, that for these cases, the photon flux of Ni I K${}_{\alpha }$ fluorescent line is expected to be 0.45 of the flux of Fe I K${}_{\alpha }$ fluorescent line at 6.4 keV, for the relative nickel overabundance $Z_{Ni}/Z=10$, as observed in the jets of SS 433. For the continuum model without the absorption edge of neutral iron, we set a 90 per cent upper limit on the flux of the narrow Ni I K${}_{\alpha }$ line at the level of $0.9\times 10^{-5}$ ph s${}^{-1}$ cm${}^{-2}$. For the continuum model with the absorption edge, the corresponding upper limit is $2.5\times 10^{-5}$ ph s${}^{-1}$ cm${}^{-2}$. At the same time, for the Fe I K${}_{\alpha }$ line, we measure the flux of $9.9_{8.4}^{11.2}\times 10^{-5}$ ph s${}^{-1}$ cm${}^{-2}$. Taken at the face value, the results imply that the relative overabundance of nickel in the wind of the accretion disc should be at least 1.5 times less than the corresponding excess of nickel observed in the jets of SS 433.

arXiv comment17 pages, 12 figures, 4 tables, Astronomy Letters, in press, 2018, Volume 44, Issue 6

References in corpus (27)

• An XMM-Newton survey of broad iron lines in Seyfert galaxies
• Updated Atomic Data and Calculations for X-ray Spectroscopy
• The endpoint of the rp process on accreting neutron stars
• Super-critically accreting stellar-mass black holes as ultraluminous X-ray sources
• Global Structure of Three Distinct Accretion Flows and Outflows around Black Holes through Two-Dimensional Radiation-Magnetohydrodynamic Simulations
• Photoionization Modeling and the K Lines of Iron
• The Nature of SS433 and the Ultraluminous X-ray Sources
• Cobalt-56 gamma-ray emission lines from the type Ia supernova 2014J
• The High Resolution X-ray Spectrum of SS 433 using the Chandra HETGS
• Equivalent width, shape and proper motion of the iron fluorescent line emission from the molecular clouds as an indicator of the illuminating source X-ray flux history
• Iron and Nickel properties in the X-ray reflecting region of the Circinus Galaxy
• An overview of jets and outflows in stellar mass black holes
• The profile of a narrow line after single scattering by Maxwellian electrons: relativistic corrections to the kernel of the integral kinetic equation
• Does the obscured AGN fraction really depend on luminosity?
• Polarization and long-term variability of Sgr A* X-ray echo
• Determining the Nature of the SS 433 Binary Using an X-ray Spectrum During Eclipse
• Evidences of the supercritical disc funnel radiation in X-ray spectra of SS 433
• Evidence for Jet Collimation in SS 433 with the Chandra HETGS
• Diagnostics of the black hole candidate SS433 with the RXTE
• Monte-Carlo simulations of the broadband X-ray continuum of SS433
• Fe-K Line Time variability and Ni abundance of Distant Reflector in Seyfert Galaxies
• Is SS 433 a misaligned ultraluminous X-ray source? Constraints from its reflected signal in the Galactic plane
• Thermal X-ray emission from a baryonic jet: a self-consistent multicolour spectral model
• Peculiar nature of hard X-ray eclipse in SS433 from INTEGRAL observations
• Suzaku and Optical Spectroscopic Observations of SS 433 in the 2006 April Multiwavelength Campaign
• Monte Carlo simulations of the Nickel K$\alpha$ fluorescent emission line in a toroidal geometry
• X-ray line formation in the spectrum of SS 433

Cited by in corpus (10)

• XMM-Newton campaign on the ultraluminous X-ray source NGC 247 ULX-1: outflows
• NuSTAR reveals the hidden nature of SS433
• Chandra high-resolution spectra of 4U~1630-47: the disappearance of the wind
• Relativistic X-Ray Reflection and Photoionised Absorption in the Neutron-Star Low-Mass X-ray Binary GX 13+1
• Diagnostics of Parameters for the X-ray Jets of SS 433 from High-Resolution Chandra Spectroscopy
• A NuSTAR view of SS433: Precessional evolution of the jet-disk system
• Searching for the warm-hot intergalactic medium using XMM-Newton high-resolution X-ray spectra
• Accretion Properties and Estimation of Spin of Galactic Black Hole Candidate Swift J1728.9-3613 with NuSTAR during its 2019 outburst
• Spectral and photometric variability of SS 433 observed with XRISM and simultaneous optical and near-infrared telescopes
• Constraints on the collimated X-ray emission of SS 433 from the reflection on molecular clouds