The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276

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 ($\ge$ 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.

7 pages, 2 figures, accepted for publication in MNRAS

References in corpus (25)

• A luminous quasar at a redshift of z = 7.085
• Heating Hot Atmospheres with Active Galactic Nuclei
• An Ultraluminous X-ray Source Powered by An Accreting Neutron Star
• A New Sample of Low-mass Black Holes in Active Galaxies
• Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
• Formation of the first nuclear clusters and massive black holes at high redshift
• A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
• A Universal Scaling for the Energetics of Relativistic Jets From Black Hole Systems
• A mass of less than 15 solar masses for the black hole in an ultraluminous X-ray source
• A 400 solar mass black hole in the Ultraluminous X-ray source M82 X-1 accreting close to its Eddington limit
• Measuring the kinetic power of AGN in the radio mode
• The Fundamental Plane of Accretion Onto Black Holes with Dynamical Masses
• Rapid growth of seed black holes in the early universe by supra-exponential accretion
• The radio/X-ray domain of black hole X-ray binaries at the lowest radio luminosities
• The Host Galaxy and Central Engine of the Dwarf AGN POX 52
• Radio Emission on Sub-Parsec Scales from the Intermediate-Mass Black Hole in NGC 4395
• Evidence of parsec-scale jets in Low-luminosity Active Galactic Nuclei
• SDSS J160531.84+174826.1: A Dwarf Disk Galaxy With An Intermediate-Mass Black Hole
• On the radio properties of the intermediate-mass black hole candidate ESO 243-49 HLX-1
• Black hole masses and starbursts in X-shaped radio sources
• NGC 2276: a remarkable galaxy with a large number of ULXs
• Compact radio emission in Ultraluminous X-ray sources
• Starbursts and black hole masses in X-shaped radio galaxies: Signatures of a merger event?
• Steep-Spectrum Radio Emission from the Low-Mass Active Galactic Nucleus GH 10
• Revealing the nature of the ULX and X-ray population of the spiral galaxy NGC 4088

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• Mid-Infrared Colors of Dwarf Galaxies: Young Starbursts Mimicking Active Galactic Nuclei
• Multiband counterparts of two eclipsing ultraluminous X-ray sources in M 51
• NGC5252: a pair of radio-emitting active galactic nuclei?
• A Possible 55-day X-ray Period of the Ultraluminous Accreting Pulsar M82 X-2