The X-Ray Variable Sky as Seen by MAXI: The Future of Dust-echo Tomography with Bright Galactic X-Ray Bursts

Corrales, Lía; Mills, Brianna S.; Heinz, Sebastian; Williger, G. M.

doi:10.3847/1538-4357/ab0c9b

Cited by 9 publications

(7 citation statements)

References 28 publications

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“…Heinz et al (2015) managed to identify a total of four rings ('Lord of the Rings') around Cir X-1. A general consideration of the possibilities of such observations can be found in Corrales et al (2019). For dust-scattering rings where the distance of either the source or the scattering dust is known from other measurements, the second distance can be calculated geometrically using the ring radius and the time lag A&A 647, A7 (2021) of the scattered X-rays.…”

Section: Introductionmentioning

confidence: 99%

A giant X-ray dust scattering ring discovered with SRG/eROSITA around the black hole transient MAXI J1348–630

Lamer

Schwope

Predehl

et al. 2021

A&A

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We report the discovery of a giant dust scattering ring around the Black Hole transient MAXI J1348−630 with SRG/eROSITA during its first X-ray all-sky survey. During the discovery observation in February 2020, the ring had an outer diameter of 1.3 deg, growing to 1.6 deg by the time of the second all-sky survey scan in August 2020. This makes the new dust ring by far the largest X-ray scattering ring observed so far. Dust scattering halos, in particular the rings found around transient sources, provide an opportunity to make precise distance measurements towards the original X-ray sources. We combine data from SRG/eROSITA, XMM-Newton, MAXI, and Gaia to measure the geometrical distance of MAXI J1348−630. The Gaia data place the scattering dust at a distance of 2050 pc. Based on the measured time lags and the geometry of the ring we find MAXI J1348−630 at a distance of 3390 pc with a statistical uncertainty of only 1.1% and a systematic uncertainty of 10% caused mainly by the parallax offset of Gaia. This result makes MAXI J1348−630 one of the black hole transients with the most accurately determined distances. The new distance leads to a revised mass estimate for the black hole of 11 ± 2 M⊙. The transition to the soft state during the outburst occurred when the bolometric luminosity of MAXI J1348−630 reached 1.7% of its Eddington luminosity.

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Section: Introductionmentioning

confidence: 99%

A giant X-ray dust scattering ring discovered with SRG/eROSITA around the black hole transient MAXI J1348–630

Lamer

Schwope

Predehl

et al. 2021

A&A

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“…NICER, STROBE-X, eXTP Gendreau et al, 2016;Ray et al, 2019;Zhang et al, 2019). 3 The other approach that can be used to estimate distances is that of dust-scattering halos (Trümper and Schönfelder, 1973), something that requires good angular resolution, good collecting area, and the ability to observe bright sources; while Chandra has done some work in this area, Athena should be able to help dramatically (Corrales et al, 2019).…”

Section: X-ray Observationsmentioning

confidence: 99%

Astrophysics with the Laser Interferometer Space Antenna

Amaro-Seoane¹,

Andrews²,

Sedda³

et al. 2022

Preprint

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AM CVn binaries consist of a WD accreting from a hydrogen-deficient star (or WD) companion (Warner, 1995;Solheim, 2010). In their formation history (Fig. 1.6 and Section 1.3.1.1), AM CVns form after at least one CE phase of their progenitor system. The current RLO is initiated, due to orbital damping caused by GW radiation, at orbital periods of typically 5−20 min (depending on the nature and the temperature of the companion star), and the mass-transfer rate is determined

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“…Dust scattering was also recently observed around the brightest gammaray burst detected so far (GRB 221009A; Tiengo et al 2022). In some variable X-ray sources, the interaction between X-ray photons produced in repeated bursts of radiation and the dust grains can give rise to scattering echoes, that can be observed as rings (e.g., Corrales et al 2019;Lamer et al 2021). Such structures have been found around variable Galactic sources (e.g., Heinz et al 2015).…”

Section: Dust Scattering Halosmentioning

confidence: 99%

Ray-tracing simulations and spectral models of X-ray radiation in dusty media

Ricci¹,

Paltani²

2023

Preprint

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Dust can play an important role in shaping the X-ray spectra and images of astrophysical sources. In this work we report on the implementation of dust in the ray-tracing platform RefleX. We illustrate the different effects associated to the interaction between X-ray photons and dust grains, such as dust scattering, near-edge X-ray absorption fine structures and shielding. We show how the crosssections of the photon-gas interaction change depending on the fraction of metals in dust grains (i.e. the dust depletion factor). We compare RefleX simulations to the most widely-used absorption model that includes dust, and show how X-ray spectra are affected by the presence of dust in the absorbing/reprocessing medium for different geometries. We also show how RefleX can be used to reproduce the dust scattering halos observed in Galactic sources, and release the first torus Xray spectral model that considers dust absorption and scattering (RXTorusD), to reproduce the spectra of active galactic nuclei (AGN). RXTorusD also considers other physical process that are not included in the most widely-used AGN torus models, such as Rayleigh scattering and scattering on molecular gas, which can lead to remarkable differences in the predicted X-ray spectra for the same set of geometrical and physical parameters.

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The X-Ray Variable Sky as Seen by MAXI: The Future of Dust-echo Tomography with Bright Galactic X-Ray Bursts

Cited by 9 publications

References 28 publications

A giant X-ray dust scattering ring discovered with SRG/eROSITA around the black hole transient MAXI J1348–630

A giant X-ray dust scattering ring discovered with SRG/eROSITA around the black hole transient MAXI J1348–630

Astrophysics with the Laser Interferometer Space Antenna

Ray-tracing simulations and spectral models of X-ray radiation in dusty media

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