Chandra-HETGS Characterization of an Outflowing Wind in the accreting millisecond pulsar IGR J17591-2342

Abstract

IGR J17591-2342 is an accreting millisecond X-ray pulsar discovered in 2018 August in scans of the Galactic bulge and center by the INTEGRAL X-ray and gamma-ray observatory. It exhibited an unusual outburst profile with multiple peaks in the X-ray, as observed by several X-ray satellites over three months. Here we present observations of this source performed in the X-ray/gamma-ray and near infrared domains, and focus on a simultaneous observation performed with the Chandra-High Energy Transmission Gratings Spectrometer (HETGS) and the Neutron Star Interior Composition Explorer (NICER). HETGS provides high resolution spectra of the Si-edge region, which yield clues as to the source's distance and reveal evidence (at 99.999% significance) of an outflow with a velocity of $2800\mathrm{km}{\mathrm{s}}^{-1}$. We demonstrate good agreement between the NICER and HETGS continua, provided that one properly accounts for the differing manners in which these instruments view the dust scattering halo in the source's foreground. Unusually, we find a possible set of Ca lines in the HETGS spectra (with significances ranging from 97.0% to 99.7%). We hypothesize that IGR J17591-2342 is a neutron star low mass X-ray binary at a distance of the Galactic bulge or beyond that may have formed from the collapse of a white dwarf system in a rare, calcium rich Type Ib supernova explosion.

arXiv commentTo be published in the Astrophysical Journal

References in corpus (32)

• On the Absorption of X-rays in the Interstellar Medium
• Correcting for the Effects of Interstellar Extinction
• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• Chandra X-ray Spectroscopic Imaging of Sgr A* and the Central Parsec of the Galaxy
• An Overview of the Performance and Scientific Results from the Chandra X-Ray Observatory (CXO)
• Automated data reduction workflows for astronomy
• The May 1989 outburst of the Soft X-ray Transient GS 2023+338 (V404 Cyg)
• Present-day cosmic abundances. A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models
• The Chandra High Energy Transmission Grating: Design, Fabrication, Ground Calibration and Five Years in Flight
• A faint type of supernova from a white dwarf with a helium-rich companion
• Chandra-HETGS Observations of the Brightest Flare Seen from Sgr A*
• Accretion disc atmospheres and winds in low-mass X-ray binaries
• Chandra X-ray spectroscopy of the focused wind in the Cygnus X-1 system. I. The non-dip spectrum in the low/hard state
• Nickel-Rich Outflows from Accretion Disks Formed by the Accretion-Induced Collapse of White Dwarfs
• Theoretical Considerations on the Properties of Accreting Millisecond Pulsars
• The dust scattering component of X-ray extinction: Effects on continuum fitting and high-resolution absorption edge structure
• Disk-jet coupling in low-luminosity accreting neutron stars
• The Formal Underpinnings of the Response Functions used in X-Ray Spectral Analysis
• Broad-band spectral analysis of the accreting millisecond X-ray pulsar SAX J1748.9-2021
• Discovery of complex narrow X-ray absorption features from the low-mass X-ray binary GX13+1 with XMM-Newton
• Laboratory Measurements of the K-shell transition energies in L-shell ions of Si and S
• INTEGRAL: science highlights and future prospects
• NuSTAR and NICER reveal IGR J17591-2342 as a new accreting millisecond X-ray pulsar
• The radio-bright accreting millisecond X-ray pulsar IGR J17591-2342
• Si K Edge Structure and Variability in Galactic X-Ray Binaries
• A solar-type star polluted by calcium-rich supernova ejecta inside the supernova remnant RCW 86
• The chemical composition of the peculiar companion to the millisecond pulsar in NGC 6397
• Measuring masses in low mass X-ray binaries via X-ray spectroscopy: the case of MXB 1659-298
• A Chandra-HETG VIEW OF MCG +8-11-11
• A curious case of the accretion-powered X-ray pulsar GX 1+4
• Leveraging High Resolution Spectra to Understand Black Hole Spectra

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• Outflows and spectral evolution in the eclipsing AMXP SWIFT J1749.4-2807 with NICER, XMM-Newton and NuSTAR
• High resolution X-ray spectroscopy of V4641 Sgr during its 2020 outburst
• The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars
• Spectral analysis of the AMXP IGR J17591-2342 during its 2018 outburst
• Disk reflection and energetics from the accreting millisecond pulsar SRGA J144459.2-604207
• Accretion disc winds in X-ray binaries
• Updated Spin and Orbital Parameters and Energy Dependent Pulse Behaviors of the Accreting Millisecond X-ray Pulsar IGR J17591$-$2342
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