Accretion Flow Evolution of a New Black Hole Candidate MAXI J1348-630 During the 2019 Outburst

Abstract

Galactic black hole candidate MAXI~J1348-630 was recently discovered by {\it MAXI} and {\it Swift}/BAT satellites during its first outburst in 2019 January which continued for $\sim 4$ months. We study the spectral and timing properties of the source in detail. The combined $1-150$ keV {\it Swift}/XRT, {\it Swift}/BAT and {\it MAXI}/GSC spectra are investigated with the two component advective flow (TCAF) solution. Physical flow parameters of TCAF, such as the Keplerian disk accretion rate, the sub-Keplerian halo accretion rate, the shock location and the shock compression ratio are estimated from our spectral fits. Based on the variation of flux in soft and hard X-ray ranges, the hardness ratio, TCAF model fitted accretion rates and accretion rate ratio (ARR), we show how the sources evolved through four spectral states viz. hard, hard-intermediate, soft-intermediate and soft states in rising and declining states. Low-frequency quasi-periodic oscillations (QPO) are observed in two observations during the rising phase of the outburst. From the spectral analysis, we estimate the mass of the black hole to be $9.1_{-1.2}^{+1.6}$ $M_{\odot }$. We also find that the viscous timescale in this outburst is $\sim 3.5$ days. The distance of the source is also estimated as $5-10$ kpc from state transition luminosity.

15 Pages, 6 Figures, 2 Tables (Accepted for Publication in ApJ)

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Cited by in corpus (14)

• A giant X-ray dust scattering ring around the black hole transient MAXI J1348-630 discovered with SRG/eROSITA
• Detailed analysis on the reflection component for the black hole candidate MAXI J1348-630
• Transitions and Origin of the Type-B Quasi-Periodic Oscillation in the Black Hole X-ray Binary MAXI~ J1348--630
• NuSTAR monitoring of MAXI J1348-630: evidence of high density disc reflection
• Peculiar disk behaviors of the black hole candidate MAXI J1348-630 in the hard state observed by Insight-HXMT and Swift
• NuSTAR and Swift Observations of the Extragalactic Black Hole X-ray Binaries
• Relation Between Quiescence and Outbursting Properties of GX 339-4
• MAXI~J1348--630: Estimating the black hole mass and binary inclination using a scaling technique
• A moderate spin for the black hole in X-ray binary MAXI J1348-630 revealed by Insight-HXMT
• Back to business: SLX 1746--331 after 13 years of silence
• Accretion Flow Properties of EXO 1846-031 During its Multi-Peaked Outburst After Long Quiescence
• Broadband Spectral properties of MAXI J1348--630 using AstroSat Observations
• Broadband X-ray Spectroscopy and Estimation of Spin of the Galactic Black Hole Candidate GRS 1758-258
• Properties of 2017-18 'failed' Outburst of GX 339-4