The gaseous environments of double radio galaxies

Details The gaseous environments of double radio galaxies The gaseous environments of double radio galaxies

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.215..799m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 215, Aug. 15, 1985, p. 799-814. Research supported by C

Astronomy and Astrophysics

Astronomy

30

Interstellar Gas, Radio Galaxies, X Rays, Brightness, Emissivity, Gas Temperature, Luminosity, Mass, Thermal Emission

Scientific paper

A detailed investigation is made of the X-ray emission from five 3CR double radio galaxies, and upper limits are set to the X-ray emissivity of the regions around the radio lobes. These limits, when combined with the expected behaviour of hot gas in and around the lobes, show that most of the radio-emitting plasma observed is unlikely to be maintained in static pressure-balance with an external medium. The plasma must expand, and the luminosities of double radio galaxies may therefore decrease with time for most of their lifetimes. A lower limit on the magnetic field strength in the lobes of one-tenth the equipartition value is also derived.

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