The spins of the Galactic black holes in MAXI J1535-571 and 4U 1630-472 from Insight-HXMT

Abstract

Insight-HXMT is the first Chinese X-ray astronomical mission. With a 1-250 keV bandpass, an energy resolution of 150 eV at 6 keV, and without being subject to pile-up distortions, it is suitable to study bright X-ray sources like Galactic black holes. In the present paper, we study Insight-HXMT observations of the X-ray binaries MAXI J1535-571 and 4U 1630-472 during their outbursts in 2017 and 2020, respectively. From the analysis of the reflection features, we are able to infer the black hole spin parameter in the two sources. For MAXI J1535-571, we find a spin parameter very close to 1, $a_{\ast }=0.9916\pm 0.0012$ (90% C.L., statistical error), which is consistent with the previous NuSTAR measurement. For 4U 1630-472, we find a moderately high value of the black hole spin parameter, $a_{\ast }=0.817\pm 0.014$ (90% C.L., statistical error), which is lower than the almost extremal value found with NuSTAR data.

11 pages, 8 figures. v2: refereed version. v3: changed layout and fixed the size of Tab. 4

References in corpus (21)

• A systematic look at the Very High and Low/Hard state of GX 339-4: Constraining the black hole spin with a new reflection model
• Towards precision measurements of accreting black holes using X-ray reflection spectroscopy
• X-ray reflection in accreting stellar-mass black hole systems
• Driving extreme variability: The evolving corona and evidence for jet launching in Markarian 335
• High Density Reflection Spectroscopy I. A case study of GX~339-4
• Reflection Spectra of the Black Hole Binary Candidate MAXI J1535-571 in the Hard State Observed by NuSTAR
• Self-Consistent Black Hole Accretion Spectral Models and the Forgotten Role of Coronal Comptonization of Reflection Emission
• Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein's Gravity
• Black hole mass determination in the X-ray binary 4U 1630--47: Scaling of spectral and variability characteristics
• Testing General Relativity with NuSTAR data of Galactic Black Holes
• Estimating the black hole spin for the X-ray binary MAXI J1820+070
• Reflection Modeling of the Black Hole Binary 4U~1630$-$47: the Disk Density and Returning Radiation
• A New Spin on an Old Black Hole: NuSTAR Spectroscopy of EXO 1846-031
• Broadband reflection spectroscopy of MAXI J1535-571 using AstroSat: Estimation of black hole mass and spin
• Testing the Kerr Black Hole Hypothesis with GX 339-4 by a combined analysis of its thermal spectrum and reflection features
• NuSTAR Observations of the Black Hole GS 1354-645: Evidence of Rapid Black Hole Spin
• Physical origin of the nonphysical spin evolution of MAXI J1820+070
• Impact of the returning radiation on the analysis of the reflection spectra of black holes
• Reflection spectra of accretion disks illuminated by disk-like coronae
• Testing evolution of LFQPOs with mass accretion rate in GRS 1915+105 with Insight-HXMT
• Testing General Relativity with black hole X-ray data: a progress report

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• Spectropolarimetric study of 4U 1630$-$47 in Steep Power law state with IXPE and NICER
• Measuring Black Hole Spins through X-ray Reflection Spectroscopy and the Relativistic Precession Model: the case of XTE J1859+226
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• Impact of ionization and electron density gradients in X-ray reflection spectroscopy measurements
• Testing the $\delta$-Kerr metric with black hole X-ray data
• Impact of reflection Comptonization on X-ray reflection spectroscopy: the case of EXO 1846-031
• The mHz quasi-regular modulations of 4U 1630--47 during its 1998 outburst
• QPOML: A Machine Learning Approach to Detect and Characterize Quasi-Periodic Oscillations in X-ray Binaries
• The peculiar disk evolution of 4U 1630--472 observed by Insight-HXMT during the 2022 and 2023 outbursts
• NICER Spectral and Timing Analysis of 4U 1630$-$47 and its Heartbeat State