Sentences with phrase «active radio galaxies»
Previous surveys showed that about 7 % of active radio galaxies have X-shaped, or «winged,» jets.
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One alternative is the galaxy's active nucleus, with radio emission coming from jets of material emitted from the region surrounding a supermassive black hole.
Science Interests Formation of galaxies and black holes in the early universe and their growth over cosmic time; large surveys with Hubble and other telescopes to discover new populations of distant galaxies and black holes; physical properties of active galactic nuclei using observations from radio, infrared, optical, ultraviolet through to X-ray energies.
These include radio galaxy hot spots and active galactic nuclei (AGN) jets.
The top candidates, the astronomers suggested, are a neutron star, possibly a highly - magnetic magnetar, surrounded by either material ejected by a supernova explosion or material ejected by a resulting pulsar, or an active nucleus in the galaxy, with radio emission coming from jets of material emitted from the region surrounding a supermassive black hole.
The radio emission of the active galaxies was puzzling because it could not be attributed to a collection of stars and gas under normal conditions.
Active galaxies come in a variety of types, including Seyfert galaxies, radio galaxies, and quasars.
They are relatively weak sources compared to active galaxies, which fall into various categories such as radio galaxies, Seyfert galaxies, and quasars.
The GBT has joined Spektr - R in several observations of active galactic nuclei, the supermassive black holes lurking inside galaxies that are bright in radio waves.
Another idea is that the variations in the radio emission are not connected to the burst itself, but are arising within an active galaxy in which the burst occurred.
A third type of active galaxy called BL Lacertae objects (BL Lac objects for short) are probably radio galaxies with their jets pointed right at us.
Active galaxy (PKS 1519 - 273) as imaged with HALCA satellite, along with the National Science Foundation's VLBA and VLA ground - based radio telescopes.
The large - scale optical and radio structures previously have been thought to indicate the symmetry axis of the active nucleus in the inner light - months of the galaxy, an idea now called into question by the new VLBA images.
The main science targets specific to these Hubble observations are the host galaxies of Green Double Radio - lobed Active Galactic Nuclei (Green DRAGN — pronounced Green Dragon) and Spiral Double Radio - lobed Active Galactic Nuclei (S - DRAGN).
The «active» part of the galaxy is the supermassive black hole in its core, which spews out strong jets of energetic particles that produce enormous lobes of radio emission.
Astronomers believe that supermassive, central black holes generate the radio, X-ray, and gamma - ray energy radiated by active galaxies such as Centaurus A, as well as quasars like SDSS J1030 +0524.