The Long-stable Hard State of XTE J1752-223 and the Disk Truncation Dilemma

Connors, Riley; Garcia, J. Rodriguez; Tomsick, John A.; Mastroserio, Guglielmo; Grinberg, V.; Steiner, James F.; Jiang, Jiachen; Fabian, A. C.; Parker, M. L.; Harrison, Fiona A.; Hare, Jeremy; Mallick, Labani; Lazar, Hadar

doi:10.3847/1538-4357/ac7ff2

Cited by 10 publications

(9 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We note that the inclination angle measurements with reflection analysis can be affected by systematic uncertainties, e.g., the lack of knowledge of the corona geometry or simplifications in the model calculations (see discussions in Bambi et al 2021). In some cases, the systematic uncertainty can be as large as ∼30°(e.g., García et al 2018b;Connors et al 2022). This might explain the discrepancy we are seeing.…”

Section: Inclination Anglementioning

confidence: 79%

High-density Reflection Spectroscopy of Black Hole X-Ray Binaries in the Hard State

Jiang

Zhang

Bambi

et al. 2023

ApJ

Self Cite

View full text Add to dashboard Cite

We present a high-density relativistic reflection analysis of 21 spectra of six black hole X-ray binaries in the hard state with data from NuSTAR and Swift. We find that 76% of the observations in our sample require a disk density higher than the 1015 cm−3 assumed in the previous reflection analysis. Compared with the measurements from active galactic nuclei, stellar mass black holes have higher disk densities. Our fits indicate that the inner disk radius is close to the innermost stable circular orbit in the luminous hard state. The coronal temperatures are significantly lower than the prediction of a purely thermal plasma, which can be explained with a hybrid plasma model. If the disk density is fixed at 1015 cm−3, the disk ionization parameter is overestimated while the inner disk radius is unaffected.

show abstract

Section: Inclination Anglementioning

confidence: 79%

High-density Reflection Spectroscopy of Black Hole X-Ray Binaries in the Hard State

Jiang

Zhang

Bambi

et al. 2023

ApJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…Note that a few other sources may also match our selection criteria but they have already been studied with reflection models of variable electron density (e.g. GX 339-4, Jiang et al 2019a;GRS 1716-249, Jiang et al 20204U 1630-47, King et al 2014, Connors et al 2021MAXI J1348-630, Chakraborty et al 2021. We do not include those sources in the analysis of this work.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

“…Previous high-density reflection modelling of black hole XRBs has only been conducted for a few sources (e.g. Reis et al 2008Reis et al , 2009Reis et al , 2011Steiner et al 2011;Reis et al 2012b;Steiner et al 2012b;Walton et al 2012;Chiang et al 2012;Tomsick et al 2018;Jiang et al 2019aJiang et al , 2020Connors et al 2021;Chakraborty et al 2021). Moreover, on the log(n e )-log(M BH ṁ2 ) diagram, there is still an obvious gap between the XRBs and AGNs sample (see Fig.…”

Section: Introductionmentioning

confidence: 96%

High-density reflection spectroscopy of black hole X-ray binaries in the hard state

Jiang¹,

Zhang²,

Bambi³

et al. 2023

Preprint

View full text Add to dashboard Cite

We present a high-density relativistic reflection analysis of 21 spectra of six black hole X-ray binaries in the hard state with data from NuSTAR and Swift. We find that 76% of the observations in our sample require a disk density higher than the 10 15 cm −3 assumed in the previous reflection analysis. Compared with the measurements from active galactic nuclei, stellar mass black holes have higher disk densities. Our fits indicate that the inner disk radius is close to the innermost stable circular orbit in the hard state. The coronal temperatures are significantly lower than the prediction of a purely thermal plasma, which can be explained with a hybrid plasma model. If the disk density is fixed at 10 15 cm −3 , the disk ionization parameter would be overestimated while the inner disk radius is unaffected.

show abstract

“…While there is some debate over the geometry of the accretion disk during the hard state, namely whether or not it extends to the ISCO (see, e.g., Kolehmainen et al 2011;García et al 2015;Miller et al 2015;Basak & Zdziarski 2016;Zdziarski et al 2021;Connors et al 2022), it is generally accepted that the accretion disk arrives at the ISCO between the intermediate and soft states. The intermediate state is particularly interesting because both the soft, thermal disk and the hard power-law component are quite evident in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Reflection and Timing Study of the Transient Black Hole X-Ray Binary MAXI J1803-298 with NuSTAR

Tomsick

Mastroserio

et al. 2023

ApJ

Self Cite

View full text Add to dashboard Cite

The transient black hole X-ray binary MAXI J1803−298 was discovered on 2021 May 1, as it went into outburst from a quiescent state. As the source rose in flux it showed periodic absorption dips and fit the timing and spectral characteristics of a hard-state accreting black hole. We report on the results of a Target-of-Opportunity observation with NuSTAR obtained near the peak outburst flux beginning on 2021 May 13, after the source had transitioned into an intermediate state. MAXI J1803−298 is variable across the observation, which we investigate by extracting spectral and timing products separately for different levels of flux throughout the observation. Our timing analysis reveals two distinct potential quasiperiodic oscillations (QPOs) which are not harmonically related at 5.4 ± 0.2 Hz and 9.4 ± 0.3 Hz, present only during periods of lower flux. With clear relativistic reflection signatures detected in the source spectrum, we applied several different reflection models to the spectra of MAXI J1803−298. Here we report our results, utilizing high-density reflection models to constrain the disk geometry, and assess changes in the spectrum dependent on the source flux. With a standard broken power-law emissivity, we find a near-maximal spin for the black hole, and we are able to constrain the inclination of the accretion disk at 75° ± 2°, which is expected for a source that has shown periodic absorption dips. We also significantly detect a narrow absorption feature at 6.91 ± 0.06 keV with an equivalent width between 4 and 9 eV, which we interpret as the signature of a disk wind.

show abstract

The Long-stable Hard State of XTE J1752-223 and the Disk Truncation Dilemma

Cited by 10 publications

References 55 publications

High-density Reflection Spectroscopy of Black Hole X-Ray Binaries in the Hard State

High-density Reflection Spectroscopy of Black Hole X-Ray Binaries in the Hard State

High-density reflection spectroscopy of black hole X-ray binaries in the hard state

Reflection and Timing Study of the Transient Black Hole X-Ray Binary MAXI J1803-298 with NuSTAR

Contact Info

Product

Resources

About