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Modelling the kinematics of the decelerating jets from the black hole X-ray binary MAXI J1348-630
- Source :
- Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2022, 511 (4), pp.4826-4841. ⟨10.1093/mnras/stac329⟩
- Publication Year :
- 2022
- Publisher :
- Oxford University Press, 2022.
-
Abstract
- Black hole low mass X-ray binaries (BH LMXBs) can launch powerful outflows in the form of discrete ejecta. Observing the entire trajectory of these ejecta allows us to model their motion with great accuracy, and this is essential for measuring their physical properties. In particular, observing the final deceleration phase, often poorly sampled, is fundamental to obtain a reliable estimate of the jet's energy. During its 2019/2020 outburst, the BH LMXB MAXI J1348$-$630 launched a single-sided radio-emitting jet that was detected at large scales after a strong deceleration due to the interaction with the interstellar medium (ISM). We successfully modelled the jet motion with a dynamical external shock model, which allowed us to constrain the jet initial Lorentz factor $\Gamma_0 = 1.85^{+0.15}_{-0.12}$, inclination angle $\theta = 29.3_{-3.2}^{+2.7}$ deg and ejection date $t_{\rm ej} = 21.5_{-3.0}^{+1.8}$ (MJD $-$ $58500$). Under simple assumptions on the jet opening angle and on the external ISM density, we find that the jet has a large initial kinetic energy $E_0 = 4.6^{+20.0}_{-3.4} \times 10^{46}$ erg, far greater than what commonly measured for LMXBs from the jet's synchrotron emission. This implies that discrete ejecta radiate away only a small fraction of their total energy, which is instead transferred to the environment. The jet power estimate is larger than the simultaneous available accretion power, and we present several options to mitigate this discrepancy. We infer that MAXI J1348$-$630 is likely embedded in an ISM cavity with internal density $n = 0.0010^{+0.0005}_{-0.0003}$ cm$^{-3}$ and radius $R_{\rm c} = 0.61^{+0.11}_{-0.09}$ pc, which could have been produced by the system's previous activity, as proposed for other BH LMXBs.<br />Comment: 17 pages, 6 figures. Accepted for publication in MNRAS
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
stars: individual: MAXI J1348–630
Astrophysics::High Energy Astrophysical Phenomena
black hole physics
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
accretion discs
X-rays: binaries
ISM: jets and outflows
accretion
binaries: general
Space and Planetary Science
High Energy Physics::Experiment
Astrophysics - High Energy Astrophysical Phenomena
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
radio continuum: stars
Subjects
Details
- Language :
- English
- ISSN :
- 00358711 and 13652966
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, 2022, 511 (4), pp.4826-4841. ⟨10.1093/mnras/stac329⟩
- Accession number :
- edsair.doi.dedup.....fa19fd95c5ff474f0e586669e454ac31