The black hole X-ray binary MAXI J1348–630 in quiescence

Carotenuto, Francesco; Corbel, S.; Tzioumis, Anastasios

doi:10.1093/mnrasl/slac087

Cited by 9 publications

(3 citation statements)

References 60 publications

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“…This is in the same part of the parameter space as the stellar-mass BH candidates in the clusters M22 (Strader et al 2012a) and M62 (Chomiuk et al 2013), indicating that the radio/X-ray luminosity ratio of ATCA J002405 is similar to other BH candidates in clusters. Other stellar-mass BHs in quiescence have also been shown to occupy this part of the parameter space, specifically MAXI J1348-630 (Carotenuto et al 2022). The radio spectrum of ATCA J002405 is consistent with being flat, which is what is expected from stellar-mass BHXBs.…”

Section: Stellar-mass Black Holementioning

confidence: 67%

Ultradeep ATCA Imaging of 47 Tucanae Reveals a Central Compact Radio Source

Paduano,

Bahramian,

Miller-Jones

et al. 2024

ApJ

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We present the results of an ultradeep radio continuum survey, containing ∼480 hr of observations, of the Galactic globular cluster 47 Tucanae with the Australia Telescope Compact Array. This comprehensive coverage of the cluster allows us to reach rms noise levels of 1.19 μJy beam−1 at 5.5 GHz, 940 nJy beam−1 at 9 GHz, and 790 nJy beam−1 in a stacked 7.25 GHz image. This is the deepest radio image of a globular cluster and the deepest image ever made with the Australia Telescope Compact Array. We identify ATCA J002405.702-720452.361, a faint (6.3 ± 1.2 μJy at 5.5 GHz, 5.4 ± 0.9 μJy at 9 GHz), flat-spectrum (α = −0.31 ± 0.54) radio source that is positionally coincident with the cluster center and potentially associated with a faint X-ray source. No convincing optical counterpart was identified. We use radio, X-ray, optical, and UV data to show that explanations involving a background active galactic nucleus, a chromospherically active binary, or a binary involving a white dwarf are unlikely. The most plausible explanations are that the source is an undiscovered millisecond pulsar or a weakly accreting black hole. If the X-ray source is associated with the radio source, the fundamental plane of black-hole activity suggests a black hole mass of ∼54–6000 M ⊙, indicating an intermediate-mass black hole or a heavy stellar-mass black hole.

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Section: Stellar-mass Black Holementioning

confidence: 67%

Ultradeep ATCA Imaging of 47 Tucanae Reveals a Central Compact Radio Source

Paduano,

Bahramian,

Miller-Jones

et al. 2024

ApJ

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“…In these binaries the companions are mostly K-or M-type main-sequence (MS) stars, while in binaries with orbital periods longer than 1 day, the companions are mostly giant stars (Li 2015). Almost all BH LMXBs are transient sources with quiescent X-ray luminosities ∼10 30 -10 34 erg s −1 (Garcia et al 2001;Carotenuto et al 2022), but the luminosities can increase by several orders of magnitude during outbursts, reaching ∼10 37 -10 39 erg s −1 . The BH masses measured by dynamical methods are distributed between ∼3 M e and >15 M e (Casares & Jonker 2014).…”

Section: Introductionmentioning

confidence: 99%

On the Magnetic Braking Law in Black Hole Low-mass X-Ray Binaries

Deng,

2024

ApJ

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Magnetic braking (MB) plays an important role in the evolution of close low-mass X-ray binaries (LMXBs). It is also essential to the formation of ultracompact X-ray binaries (UCXBs). There have been lively investigations on the MB mechanism(s) in both single stars and close binaries including cataclysmic variables and neutron star (NS) LMXBs but with diverse conclusions. In this paper we explore the effect of MB on the black hole (BH) LMXB evolution. We combine binary population synthesis with detailed binary evolution to obtain the expected properties of the Galactic BH LMXB population. The simulated results are compared with the observational data including the BH mass, companion mass, companion temperature, orbital period, and mean accretion rate. Our results reveal that the MB laws with relatively low efficiency (i.e., RM12 and RVJ83) exhibit better agreement with observations, contrary to what was found for NS LMXBs. This raises the interesting question about whether MB really follows the same unified law in different types of binaries. We also predict that only a very small fraction (≲2.5%) of BH LMXBs can evolve to be UCXBs. This explains why no BH UCXB has been discovered so far.

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“…http://simbad.u-strasbg.fr/simbad/. It is worth noting that, in this paper, the source type of MAXI J1348−630 and Swift J0243.6+6124 are adopted fromCarotenuto et al (2022) andChakrabarty (2018) rather than the SIMBAD database.…”

mentioning

confidence: 99%

The Long-term Monitoring Results of Insight-HXMT in the First 4 yr Galactic Plane Scanning Survey

Wang

Liao

Guan

et al. 2023

ApJS

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The first X-ray source catalog of the Insight-HXMT Galactic Plane (∣b∣ < 10°) Scanning Survey (GPSS) is presented based on the data accumulated from 2017 June to 2021 August. The 4 yr limit sensitivities at main energy bands can reach 8.2 × 10−12 erg s−1 cm2 (2−6 keV), 4.21 × 10−11 erg s−1 cm2 (7−40 keV), and 2.78 × 10−11 erg s−1 cm2 (25−100 keV). More than 1300 sources have been monitored at a wide band (1−100 keV), of which 223 sources have a signal-to-noise ratio greater than 5. We combined the GPSS data of Insight-HXMT and MAXI and found it feasible to obtain more complete long-term light curves from their scanning results. The flux variabilities at different energy bands of the 223 bright sources are analyzed based on the excess variances. It is found that the fluxes of X-ray binaries are more active than those of supernova remnants and isolated pulsars. Different types of binaries, e.g., low-mass X-ray binaries (LMXBs), high-mass X-ray binaries (HMXBs), neutron star binaries, and black hole binaries, also distinctively show different regularities. In addition, the relations between the hardness ratio (HR) and excess variances, and HR and source types are analyzed. It is obvious that the HRs of HMXBs tend to be harder than those of LMXBs and HMXBs tend to be more active than those of LMXBs.

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The black hole X-ray binary MAXI J1348–630 in quiescence

Cited by 9 publications

References 60 publications

Ultradeep ATCA Imaging of 47 Tucanae Reveals a Central Compact Radio Source

Ultradeep ATCA Imaging of 47 Tucanae Reveals a Central Compact Radio Source

On the Magnetic Braking Law in Black Hole Low-mass X-Ray Binaries

The Long-term Monitoring Results of Insight-HXMT in the First 4 yr Galactic Plane Scanning Survey

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