A 300-parsec-long jet-inflated bubble around a powerful microquasar in the galaxy NGC 7793

  title={A 300-parsec-long jet-inflated bubble around a powerful microquasar in the galaxy NGC 7793},
  author={Manfred W. Pakull and Roberto Soria and Christian Motch},
Black-hole accretion states near or above the Eddington luminosity (the point at which radiation force outwards overcomes gravity) are still poorly known because of the rarity of such sources. Ultraluminous X-ray sources are the most luminous class of black hole (LX ≈ 1040 erg s−1) located outside the nuclei of active galaxies. They are likely to be accreting at super-Eddington rates, if they are powered by black holes with masses less than 100 solar masses. They are often associated with shock… 

Figures from this paper

A newly discovered double–double candidate microquasar in NGC 300
We present the discovery of a powerful candidate microquasar in NGC 300, associated with the S 10 optical nebula (previously classified as a supernova remnant). Chandra images show four discrete
The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276
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
Super-Eddington Accretion in the Ultraluminous X-ray Source NGC 1313 X-2: An Ephemeral Feast
We investigate the X-ray spectrum, variability, and the surrounding ionized bubble of NGC 1313 X-2 to explore the physics of super-Eddington accretion. Beyond the Eddington luminosity, the accretion
A New Microquasar Candidate in M83
Microquasars are neutron star or black hole X-ray binaries with jets. These jets can create shock-ionized bubbles of hot plasma that can masquerade as peculiar supernova remnants (SNRs) in
The ultraluminous X-ray source bubble in NGC 5585
Some ultraluminous X-ray sources (ULXs) are surrounded by collisionally ionized bubbles, larger and more energetic than supernova remnants: they are evidence of the powerful outflows associated with
Thermal stability of winds driven by radiation pressure in super-Eddington accretion discs
Ultraluminous X-ray sources (ULXs) are mainly powered by accretion in neutron stars or stellar-mass black holes. Accreting at rates exceeding the Eddington limit by factors of a few up to hundreds,
Super-Eddington Mechanical Power of an Accreting Black Hole in M83
There Goes the Neighborhood A mass-accreting black hole in steady-state cannot produce more radiative energy than its gravity can counterbalance, achieving what is known as the Eddington limit.
Optical IFU spectroscopy of a bipolar microquasar jet in NGC 300
We recently reported the discovery of a candidate jet-driving microquasar (S10) in the nearby spiral galaxy NGC 300. However, in the absence of kinematic information, we could not reliably determine
Jets, arcs, and shocks: NGC 5195 at radio wavelengths
We studied the nearby, interacting galaxy NGC 5195 (M 51b) in the radio, optical and X-ray bands. We mapped the extended, low-surface-brightness features of its radio-continuum emission; determined


Optical Counterparts of Ultraluminous X-Ray Sources
Despite much observational and theoretical effort little is presently known about the nature of the luminous non-nuclear X-ray sources which appear to largely surpass the Eddington limit of a few
The Estimate of Kinetic Power of Jets in FR II Radio Galaxies: Existence of Invisible Components?
We investigate the total kinetic power (Lj) and age (tage) of powerful jets in FR II radio galaxies by comparison of the dynamical model of expanding cocoons with observations. We select four FR II
The Cavity of Cygnus A
In this Letter, we focus on the limb-brightened, prolate spheroidal cavity of the radio galaxy Cygnus A, as revealed by the Chandra X-Ray Observatory. We use the shock-heated, thermal intracluster
An X-Ray, Optical, and Radio Search for Supernova Remnants in the Nearby Sculptor Group Sd Galaxy NGC 7793
This paper is the second in a series devoted to examining the multiwavelength properties of supernova remnants (SNRs) located in nearby galaxies. We consider here the resident SNRs in the nearby
On IC 10 X-1, the Most Massive Known Stellar-Mass Black Hole
IC 10 X-1 is a variable X-ray source in the Local Group starburst galaxy IC 10 whose optical counterpart is a Wolf-Rayet (WR) star. Prestwich and coworkers recently proposed that it contains the most
Ultraluminous X-ray Sources: Bubbles and Optical Counterparts
Optical studies of ultraluminous X-ray sources (ULX) in nearby galaxies have turned out to be instrumental in discriminating between various models including the much advertised intermediate mass
The Jets and Supercritical Accretion Disk in SS433
The review describes observations and investigations of the unique object SS433 obtained after 23 years of studying this massive binary system. The main difference between SS433 and other known X-ray
What are ultraluminous X-ray sources?
We review observations of ultraluminous X-ray sources (ULXs). X-ray spectroscopic and timing studies of ULXs suggest a new accretion state distinct from those seen in Galactic stellar-mass black hole
The nature of SS433 and the ultraluminous X-ray sources
The periodic precession (162-d) and nodding (6.3-d) motions of the jets in SS433 are driven in the outer regions of the disc, whereas the jets themselves, being relativistic, are launched near the
ROSAT observations of the Sculptor galaxy NGC7793
We report here the results of spectral imaging observations with the ROSAT PSPC of the field surrounding the very nearby (D=3.38 Mpc) Sculptor galaxy, NGC7793. Many point sources are detected within