VLBI at 4.9 GHz plus multi-epoch survey data reveal a fading parsec-scale radio component near the optical center of a dwarf galaxy, interpreted as transient ejecta from IMBH accretion.
The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276
3 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
Jet ejection by accreting black holes is a mass invariant mechanism unifying stellar and supermassive black holes (SMBHs) that should also apply for intermediate-mass black holes (IMBHs), which are thought to be the seeds from which SMBHs form. We present the detection of an off-nuclear IMBH of $\sim$5 $\times$ 10$^{4}$ M$_\odot$ located in an unusual spiral arm of the galaxy NGC 2276 based on quasi-simultaneous \textit{Chandra} X-ray observations and European VLBI Network (EVN) radio observations. The IMBH, NGC2276-3c, possesses a 1.8 pc radio jet that is oriented in the same direction as large-scale ($\sim$650 pc) radio lobes and whose emission is consistent with flat to optically thin synchrotron emission between 1.6 GHz and 5 GHz. Its jet kinetic power ($4 \times 10^{40}$ erg s$^{-1}$) is comparable to its radiative output and its jet efficiency ($\geq$ 46\%) is as large as that of SMBHs. A region of $\sim$300 pc along the jet devoid of young stars could provide observational evidence of jet feedback from an IMBH. The discovery confirms that the accretion physics is mass invariant and that seed IMBHs in the early Universe possibly had powerful jets that were an important source of feedback.
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UNVERDICTED 3representative citing papers
Feasibility calculations show SKA-Mid can detect polarized emission from a Holmberg II X-1-like ULX jet within 10 hours up to ~10 Mpc, while the bubble requires ~100 hours.
Gemini spectroscopy suggests an A-type supergiant donor in NGC 1313 X-2 and provides updated constraints on orbital parameters, disk size, and gas bubble expansion.
citing papers explorer
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Detection of a parsec-scale, compact, and fading ejecta from an accreting massive black hole
VLBI at 4.9 GHz plus multi-epoch survey data reveal a fading parsec-scale radio component near the optical center of a dwarf galaxy, interpreted as transient ejecta from IMBH accretion.
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Polarimetry of Ultraluminous X-ray sources
Feasibility calculations show SKA-Mid can detect polarized emission from a Holmberg II X-1-like ULX jet within 10 hours up to ~10 Mpc, while the bubble requires ~100 hours.
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Deep optical spectroscopic monitoring of the pulsating ULX NGC 1313 X-2 with longslit Gemini observations
Gemini spectroscopy suggests an A-type supergiant donor in NGC 1313 X-2 and provides updated constraints on orbital parameters, disk size, and gas bubble expansion.