منابع مشابه
Giant Radio Galaxies
Giant radio galaxies (GRGs) are the largest structures associated with single galaxies. Their linear sizes exceed 1 Mpc and so they form the extreme tail of the radio galaxy population. Because they have expanded to such large sizes, GRGs are thought to be the endpoint of radio galaxy evolution and provide important constraints to evolutionary models. They extend well past the environment of th...
متن کاملRadio Mode Outbursts in Giant Elliptical Galaxies
Outbursts from active galactic nuclei (AGN) affect the hot atmospheres of isolated giant elliptical galaxies (gE’s), as well as those in groups and clusters of galaxies. Chandra observations of a sample of nearby gE’s show that the average power of AGN outbursts is sufficient to stop their hot atmospheres from cooling and forming stars, consistent with radio mode feedback models. The outbursts ...
متن کاملLarge-scale Radio Structure in the Universe: Giant Radio Galaxies
Giant radio galaxies (GRGs), with linear sizes larger than 1 Mpc (H0 = 50 km s Mpc), represent the biggest single objects in the Universe. GRGs are rare among the entire population of radio galaxies (RGs) and their physical evolution is not well understood though for many years they have been of special interest for several reasons. The lobes of radio sources can compress cold gas clumps and tr...
متن کاملOptical Properties of Low z Radio Galaxies
The optical morphological and photometric properties of 79 low redshift radio galaxies are discussed. It is found that most radio galaxies are luminous bulge dominated systems similar to normal non radio giant ellipticals. The average absolute magnitude of the sample is < MHOST (tot) > = -23.98, with a clear trend for FR I sources to be ∼ 0.5 mag brighter than FR II galaxies. In about 40% of th...
متن کاملStochastic particle acceleration in the lobes of giant radio galaxies
We investigate the acceleration of particles via the second-order Fermi process in the lobes of giant radio galaxies. Such sites are candidates for the accelerators of ultra-high energy cosmic rays. We focus on the nearby FR I radio galaxy Centaurus A. This is motivated by the coincidence of its position with the arrival direction of several of the highest energy Auger events. The conditions ne...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1996
ISSN: 0074-1809
DOI: 10.1017/s007418090008089x